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  • 1960-1964  (11,177)
  • 1945-1949  (1,234)
  • 1935-1939  (2,943)
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  • 201
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 1068-1068 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
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  • 202
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 1068-1068 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
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  • 203
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 1068-1068 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
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  • 204
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
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  • 205
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
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  • 206
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 1070-1070 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
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  • 207
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 1070-1070 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
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  • 208
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 327-329 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
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  • 209
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 336-338 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
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  • 210
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 569-572 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
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  • 211
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 537-543 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Corrosion behaviour of zinc and zinc coatings exposed to the atmosphereThe paper sets out to provide a synopsis of the subject. In particular,. it deals with the corrosion resistance of zinc exposed to indoor atmosphere. This resistance is normally very high; but it can be greatly reduced in the presence of large quantities of condensation water, especially if the water is formed on the zinc at packing pieces or on the underside of roofing sheets.Outdoors, the corrosion rate of zinc is generally between 1 and 10 μm per annum. Under inland conditions, this rate is roughly equivalent to the absorption of SO2 from the air. Through contact with nobler metals, the corrosion rate is sometimes increased; with contact with lead-tin solder, this increase is, however, insignificant. The resistance of galvanized steel, up to the first traces of rust, is roughly proportional to the zinc coating. The degree of purity of the zinc is largely immaterial to atmospheric corrosion; but it is of great importance to zinc castings.
    Notes: Es wird ein Überblick über das Gebiet gegeben. Im einzelnen wird ausgeführt: Gegen die Luft geschlossener Räume ist Zink meist sehr beständig. Einen erheblichen Angriff erleidet es jedoch bei schwerer Schwitzwasser-Beanspruchung, im besonderen, wenn Schwitzwasser auf dem Zink in Packstücken und an der Unterseite von Dacheindeckungsblenden entsteht.  -  Im Freien liegt die Korrosionsgeschwindigkeit des Zinks meist zwischen 1 und 10 μm je Jahr. Im Binnenland ist sie der Geschwindigkeit der SO2-Aufnahme aus der Luft etwa äquivalent.  -  Durch Kontakt mit edlerem Metall wird die Korrosion mitunter erhöht; bei Kontakt mit Blei- Zinn-Lot ist diese Erhöhung jedoch belanglos.  -  Die Beständigkeit verzinkten Stahls bis zur ersten Rostbildung ist der Zinkauflage etwa proportional.  -  Der Reinheitsgrad des Zinks ist für die atmosphärische Korrosion weitgehend belanglos, nur für Zinkdruckguß ist er wichtig.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
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  • 212
    Electronic Resource
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 578-583 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
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  • 213
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 589-596 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
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  • 214
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 584-588 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
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  • 215
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
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  • 216
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
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  • 217
    Electronic Resource
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 346-346 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
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  • 218
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 346-347 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
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  • 219
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 347-347 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
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  • 220
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. XIII 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
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  • 221
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964) 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
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  • 222
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 363-370 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Some observations concerning the climate effect upon the atmospheric corrosion of metalsThe overall influence exercised upon the corrosion of metals by the climate is discussed and elucidated by experimental results collected on the corrosion of iron in several countries. The question is raised whether or not it is possible to forecast corrosion upon the basis of meteorologic data. The most important factors involved are the relative humidity of the air, the gaseous and solid contaminants in the atmosphere and - to a lesser degree - the temperature of the air. In practical work, particular attention should be paid to the microclimate, i.e. to all the physical factors encountered in the immediate neighbourhood of the metal being corroded. In addition to the three factors mentioned above, these physical factors include the shape and mass of the metal itself, its orientation in space with regard to the soil and to the cardinal points, the direction and the velocity of the attacking air and of currents in it. Some examples are given to illustrate the effect of these factors.
    Notes: Der allgemeine Einfluß des Klimas auf die Korrosion der Metalle wird erörtert und durch Versuchsergebnisse über die Korrosion des Eisens in mehreren Ländern illustriert. Die Frage, ob man die Korrosion auf Grund meteorologischer Beobachtungen vorhersagen kann, wird diskutiert. Die wichtigsten bestimmenden Faktoren sind die relative Feuchtigkeit der Luft und deren gasförmige und feste Verunreinigungen und, in geringerem Grade, die Lufttemperatur. In der Praxis soll man vor allem dem Mikroklima Beachtung schenken, d.h. den sämtlichen physikalischen Faktoren in der unmittelbaren Nähe des Korrosion erleidenden Metalls. Darunter kommen in Betracht: die Form und die Masse des Metalls selbst, seine Orientierung, sowohl in bezug auf den Boden als auf die Himmelsrichtung, und für die angreifende Atmosphäre die Richtung und die Geschwindigkeit der Luftströmungen, außer den drei schon oben erwähnten Faktoren. Es werden einige Beispiele für die Wirkung solcher Faktoren gegeben.
    Additional Material: 16 Ill.
    Type of Medium: Electronic Resource
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  • 223
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 371-373 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Corrosion protection in steel hydraulic engineeringA description is given of a course of lectures (No. 328) at Wuppertal Technical Academy.After a review of the objects to be protected in steel hydraulic engineering, the corrosion protection methods employed with Swiss steel hydraulic engineering works are described.The article deals with pretreatment through de-rusting and the problems associated with it, methods and means of coating, spray galvanisation in steel hydraulic engineering, zinc dust primers, thickness of the protective films, guarantees, air conditioning and acclimatisation with internal paints for piping, stresses encountered in the tidal zone, atmospheric risks during the execution of the work, and the internal preservation of turbines.
    Notes: Es wird ein Bericht über den Kursus 328 an der Technischen Akademie Wuppertal gegeben.Einer Übersicht über die im Stahlwasserbau zu schützenden Objektteile folgt eine Übersicht über bei schweizerischen Stahlwasserbauten angewandte Korrosions-schutzmethoden.Die Vorbehandlung durch Entrostung und die hiermit zusammenhängenden Fragen, die Anstrichverfahren und -mittel, Spritzverzinkung im Stahlwasserbau, Zinkstaubanstrichmittet, Schichtdicke der Schutzüberzuge, Gewährleistung, Luftkonditionierung und Klimatisierung bei Innenanstrichen von Rohrleitungen, Beanspruchung in der Wasserwechselzone, das Schlechtwetter-Risiko bei der Arbeitsausführung und die Turbinen-Innenkonservierung werden behandelt.
    Type of Medium: Electronic Resource
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  • 224
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 357-362 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Microscope and electron-optical observations concerning corroslon by airborne dustBeing an interaction between dust particles and the metal surface, corrosion by airborne dust starts in the submicroscopic range. Particles of this minute size, if exposed to pressure and heat (e.g. bearing friction) tend to recrystallize and in general, to be transformed into harder structures of high energy content; these phenomena are largely unexplored so far. Optically void, i.e. genuinely smooth and clean metal surfaces, are rather rare in practice; an investigation of foils reveals, in addition to grain boundaries, grooves produced by tools, irregularities in galvanic coatings and coatings deposited from the vapour phase, imprints due to irregularities in pressing stamps, a. s. o. The corrosion by airborne dust in moving metal surfaces preferentially starts along surface discontinuities. The airborne dust particles are accompanied by adsorbed gasses, e. g. SO2; the corrosion is further characterized by particles breaking away from the metal surface and by whiskers (filiform crystals) growing under the effects of pressure and heat, in particular at the grain boundaries. The adhesion of the dust particles to the metal surface appears to be a special case of sorption, while the fracture of the surface crystallites may be compared to spark erosion. This comparison yields an access to the mathematical treatment and to the approximative numerical evaluation of the problem of corrosion by airborne dust.
    Notes: Als Wechselwirkung zwischen Staubteilchen und Metalloberfläche beginnt die Luftstaubkorrosion im sublichtmikroskopischen Gebiet. In dieser Kleinheit neigen Staubteilchen unter dem Einfluß von Druck und Hitze, z. B. der Lagerreibung, zur Umkristallisation und ganz allgemein zur Umformung in härtere, energiereiche, weitgehend unerforschte Strukturen. Im Bild optisch leere, also echt glatte Metalloberflächen sind in der Praxis äußerst selten, vielmehr zeigen Folienabrisse außer Korngrenzen auch Werkzeugriefen, die Unregelmäßigkeiten galvanischer Niederschläge oder Aufdampfungen, die Einprägung der Unebenheiten von Preßstempeln u. a. Die Korrosion von Luftstaub beginnt bei bewegten Metalloberflächen bevorzugt längs ihrer Unstetigkeiten. Dem Luftstaub gesellen sich an ihn gebundene Gase wie SO2 zu; ferner aus der Metalloberfläche gebrochene Teilchen, sowie unter Druck und Hitze, besonders an Korngrenzen gewachsene Haarkristalle (Whiskers). Die Haftung der Staubteilchen an den Metalloberflächen erscheint als Sonderfall der Sorptionshaftung; der Bruch der Oberflächenkristallite als vergleichbar mit einer Funkenerosion, wodurch die Luftstaubkorrosion einem mechanischen Formelansatz und einer zahlenmäßigen Abschätzung zugängig wird.
    Additional Material: 14 Ill.
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  • 225
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 390-393 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
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  • 226
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 394-396 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
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  • 227
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: The influence of corrosion products upon the long-therm progress of atmospheric corrosionAn analysis of the electrochemical reaction involved in atmospheric corrosion, and of the solid corrosion products and their properties reveals that the longterm progress of atmospheric corrosion depends from the mechanism of formation and from the properties of the corrosion products. Particular emphasis is placed upon the bonding type of the corrosion stimulator (e.g. SO2) in the corrosion products, and upon their water absorption capacity; the relation between these two factors is discussed. The longterm progress of atmospheric corrosion is divided into the following partial steps: formation of an electrolyte layer, destruction of the primary oxide layer, formation of solid corrosion products, corrosion in the presence of a layer of solid corrosion products. It is this latter step that is considered to be the step determining the mechanism of longterm corrosion; this step is discussed on the assumption of being a stationary state. This state is influenced in a first line by the properties of the corrosion products. The practical application of this view is demonstrated on three examples: increasing the corrosion resistance of carbon steels by alloying, corrosion protection of rust-covered steel surfaces, elaboration of laboratory testing methods. Some ways are pointed out which might enable a quantitative evaluation of the longterm mechanism of metallic corrosion in the atmosphere.
    Notes: Auf Grund einer Analyse der elektrochemischen Reaktionen der atmosphärischen Korrosion, des Entstehungsmechanismus ihrer festen Korrosionsprodukte und deren Eigenschaften folgt, daß für den langzeitigen Verlauf des Vorganges der Entstehungsmechanismus und die Eigenschaften der Korrosionsprodukte ausschlaggebend sind. Besonders betont wird die Bindungsform des Korrosionsstimulators (z. B. SO2) in den Korrosionsprodukten, ihre Wasseraufnahmefähigkeit, wobei der Zusammenhang beider Faktoren erörtert wird. Der langzeitige Verlauf der atmosphärischen Korrosion wird in folgende Teilvorgänge gegliedert - Bildung einer Elektrolytschicht, Zerstörung der primären Oxydschicht, Entstehung fester Korrosionsprodukte, Korrosion bei bestehender Schicht von Korrosionsprodukten. Dabei wird besonders die Korrosion bei bestehender Korrosionsproduktschicht als für den langzeitigen Verlauf des Vorganges bestimmend betrachtet und vom Standpunkt eines stationären Zustandes besprochen. Dieser Zustand wird vor allem von den Eigenschaften der Korrosionsprodukte beeinflußt. Die praktische Anwendungsfähigkeit dieser Auffassung wird an drei Beispielen gezeigt - der Erhöhung der Korrosionsbeständigkeit von Kohlenstoffstählen durch Legieren, des Korrosionsschutzes verrosteter Stahloberflächen und beim Entwurf von Laborprüfmethoden. Wege zur quantitativen Erfassung des langzeitigen Verlaufs der atmosphärischen Metallkorrosion werden angedeutet.
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  • 228
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 871-882 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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  • 229
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 882-882 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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  • 230
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 882-882 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
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  • 231
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 451-457 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: The weight constancy of rhodium and iridium bowls during analytical operationsFollowing a survey of literature on the use of rhodium and iridium devices for analytical and preparative purposes, a report is given on experience with bowls of these metals, roller-plated with platinum or unplated, for the following operations: annealing at 800 to 1000°C; boiling in concentrated nitric and hydrochloric acid; melting of potassium hydrogen sulphate at 400 to 600°C and of sodium and potassium carbonate at 8OO°C. In connection with the above-mentioned acids and with potassium hydrogen sulphate melts of 400°C, the unplated metals are more resistant than platinum. As expected, bowls made of rhodium or iridium rollerplated with platinum show the same high corrosion resistance as equipment made of normal platinum; but they retain their shape, even at high temperatures, better than the latter.
    Notes: Eingangs wird ein Literaturüberblick über den Einsatz von Rhodium- und Iridium-Geräten für analytische und präparative Zwecke gegeben. Anschließend wird berichtet über die Erprobung von Schalen aus den mit Platin walzplattierten sowie aus den unplattierten beiden Metallen bei folgenden Operationen: Glühen bei 800 bis 1000°C; Auskochen in konzentrierter Salpeter- und Salzsäure; Schmelzen von Kaliumhydrogensulfat bei 400 und 600° sowie von Soda-Pottasche bei 800°C. Gegenüber den genannten Säuren und Kaliumhyudogensulfatschmelzen won 400°C sind die unplattierten Metalle beständiger als Platin. Schalen aus mit Platin walzplattiertem Rhodium oder Iridium besitzen erwartungsgemäß dieselbe gute Korrosionsbeständigkeit solche aus normalem Geräteplatin, behalten aber ihre Form auch bei hohen Gebrauchstemperaturen besser als letztere.
    Additional Material: 1 Ill.
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  • 232
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    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 464-467 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: The atmospheric corrosion behaviour of aluminium and aluminium alloysSince the chemical corrosion effects of the atmosphere show a great variation, a brief description is given, first of all, of the most important characteristics of the corrosion behaviour of aluminium and aluminium alloys. The difference in the behaviour of the different alloys and the influence of the different types of atmosphere are discussed. The way in which the natural protective layers are formed, and the rate of their formation, have a decisive bearing on the corrosion behaviour. By way of examples, practical experience is discussed. Possibilities of providing protection in specific cases and the need, if any, for special maintenance measure are indicated.
    Notes: Da die chemische Beanspruchung durch die Atmosphäre sehr unterschiedlich ist, werden zunächst die wichtigsten Merkmale des Korrosionsverhaltens von Aluminium and Aluminiumlegierungen kurz geschildert. Die Unterschiede im Verhalten der einzelnen Legierungen und der Einfluß der verschiedenen Arten der Atmosphäre werden besprochen. Art und Bildungsgeschwindigkeit der entstehenden natürlichen Schutzschicht sind für das Korrosionsverhalten von entscheidender Bedeutung. Anhand einiger Beispiele wird über das Verhalten in der Praxis berichtet. Möglichkeiten des Schutzes in speziellen Fällen und der gegebenenfalls notwendigen Pflege werden diskutiert.
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  • 233
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    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 457-463 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: The influence of sulphur dioxide on the atmospheric corrosion of metalsThe paper provides a synopsis of present-day knowledge of the subject. In particular, the paper deals with the following aspects: - With zinc, nickel and cadmium, the atmospheric corrosion is roughly equivalent to the quantity of SO2 absorbed from the air, and sulphates are formed. Low air humidity reduces the absorption of SO2 and thus the corrosion of these metals. With iron, on the other hand, a simple mechanism causes the sulphur dioxide to have a catalytic effect, and oxides are fromed. A high relative humidity of the air promotes these process; a low humidity reduces them but does not affect the SO2 absorption. Due to the formation of protective layers containing sulphates, lead and copper have a particularly high weather resistance. The high weather resistance of aluminium is due to protective layers of aluminium oxides and their low capacity of absorbing SO2.
    Notes: Der Vortrag gibt einen Überblick über die jetzigen Kenntnisse auf dem behandelten Gebiet. Im einzelnen wird ausgeführt: Bei Zink Nickel und Cadmium ist die atmosphärische Korrosion der aus der Luft aufgenommenen SO2-Menge etwa äquivalent; es entstehen Sulfate. Niedrige rel. Luftfeuchtigkeit setzt die SO2-Aufnahme und damit die Korrosion dieser Metalle herab. - Bei Eisen wirkt das Schwefeldioxyd hingegen nach einem einfachen Mechanismus katalytisch; es entstehen Oxyde. Hohe relative Luftfeuchtigkeit begünstigt diese Vorgänge, niedrige verringert sie, beeinflußt die SO2-Aufnahme aber nicht. - Blei und Kupfer sind infolge Entstehung sulfathaltiger Schutzschichten besonders witterungsbeständig. Die hohe Witterungsbeständigkeit des Aluminiums beruht auf Schutzschichten aus Aluminiumoxyden und deren geringer Aufnahmefähigkeit für SO2.
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  • 234
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    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 437-450 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Corrosion investigations on metallic coatings during outdoor exposure in industrial and marine climatesCorrosion-prone materials, especially when exposed to the free atmosphere, must be protected against corrosion by protective layers. e. g. galvanic coatings. Outdoor exposure tests are very important for an assessment of coating systems as they permit a determination of the protective value of the coatings under practical conditions. The corrosion of metals in the free atmosphere is decisively governed by a number of influence factors, including in particular the moisture content at all climates, the presence of sea water drops during exposure to marine climate, and the presence of sulphur dioxide or dust during exposure to industrial climate.The outdoor exposure tests were carried out at two test fences, one at Duisburg (markedly industrial climate) and one on Helgoland (marine climate). The test specimens were fixed in an inclined position on the top of racks facing the weatherexposed side.At both test stands, the tests included specimens with galvanic zinc, cadmium, nickel and tin layers in unprotected position. The corrosion rate experienced at Duisburg with zinc and cadmium layers is several times higher than in Helgoland. Zinc coatings are much superior to cadmium coatings in the industrial climate, but show an approximately similar performance in marine climate. Chromium plating improves the corrosion resistance of zinc coatings, but has not a beneficial effect on cadmium coatings.Comparatively thin nickel and tin coalings fail in both climates after a short time. The corrosion resistance is not improved by copper priming. Currentlessly generated nickel coatings have a somewhat better performance than galvanic nickel coatings but they are, especially in a marine climate, greatly inferior to zinc or cadmium coatings of equal thickness.
    Notes: Korrosionsanfällige Werkstoffe müssen, besonders wenn sie der freien Atmosphäre ausgesetzt sind, durch Schutzschichten, z. B. galvanische Überzüge, vor Korrosion geschützt werden. Freibewitterungsversuche sind für die Beurteilung von Überzugssystemen sehr wichtig, weil durch sie der Schutzwert van Überzügen unter praktischen Einsatzbedingungen ermittelt werden kann. Bei der Korrosion von Metallen in Freiluft spielt eine Reihe von Einflüssen, vor allem aber Feuchtigkeit in allen Klimaten, Meerwassertröpfchen in Seeklima and Schwefeldioxyd bzw. Staub in Industrieklima eine entscheidende Rolle.Zur Durchführung der Naturversuche dienten zwei Freibewitterungsstände, und zwar in Duisburg (starkes Industrieklima) und Helgoland (Meeresklima). Die Prüfbleche wurden auf der Oberseite von Gestellen, deren Vorderfront nach der Wetterseite zeigte, in schräger Anordnung befestigt.Auf den beiden Prüfständen wurden galvanische Zink-, Cadmium-, Nickel- und Zinnschichten in ungeschützter Lage geprüft. Die Korrosion verläuft in Duisburg bei Zink- und Cadmiumschichten um ein Mehrfaches schneller als in Helgoland. Zinküberzüge sind in Industrieklima den Cadmiumschichten erheblich überlegen, verhalten sich aber in Seeklima ähnlich wie diese. Eine Chromatierung verbessert die Korrosionsbeständigkeit von Zinküberzügen, wirkt sich aber bei Cadmium nicht günstig aus.Verhältnismäßig dünne Nickel- und Zinnschichten versagen in beiden Klimaten innerhalb kurzer Zeit. Eine Unterkupferung verbessert die Korrosionbeständigkeit nicht. Stromlos erzeugte Nicklüberzüge verhalten sich etwas besser als galvanische Nickelschichten, aber - vor allem in Seeklima - erheblich schlechter als Zink- oder Cadmiumüberzüge gleicher Schichtdicke.
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    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. XXV 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 704-704 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
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  • 237
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    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964) 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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  • 238
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    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 705-721 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Materials displayed at the ACHEMA 1964The ACHEMA report covers briefly the following topics: iron and steel; nonferrous metals and alloys; ceramics and glass; rubber and plastics; natural and chemical fibres; other materials; pre-treatment; testing methods; development trends. In many cases, the exhibits give rise to comparisons with the author's own experience. High-resistance steels and alloys continue to be in the foreground. In addition, however, the so-called rare metals and the plastics are gaining ground. In this connection, the fluorine carbons play a prominent part.
    Notes: Der Achemabericht berücksichtigt kurz Eisen und Stahl  -  NE-Metalle und -legierungen  -  Keramik und Glas  -  Kautschuk und Kunststoffe  -  Natürliche und Chemie-Fasern  -  Sonstige Werkstoffe  -  Vorbehandlung, Prüfverfahren  -  Entwicklungstendenzen. Er verwertet an vielen Stellen eigen Erfahrungen des Autors zum Vergleich. Die hochbeständigen Stähle/ Legierungen stehen weiter im Vordergrund. Daneben ist aber ein Vordringen der sog. seltenen Metalle und der Kunstoffe zu verzeichnen. Die Fluorcarbone nehmen dabei eine bevorzugte Stellung ein.
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  • 239
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    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 726-728 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Homogeneously lead-coated steel as a structural material Part IIOn the basis of the conventional pretinning method developed by Flosol the question of a more economic use of tin by chosing suitable lead alloys (Pb—Sn—As alloys) as an intermediate, adhesion-improving coat prior to the lead coating in the melt is investigated. A textual and pictorial description is given of the technology of the relevant methods, especially those used by Knapp Mills Inc. and Broken Hill Ass. Lead Smelters.
    Notes: Ausgehend von dem klassischen Vorverzinnungsverfahren nach Flosol wird die Frage der Einsparung won Zinn durch Wahl geeigneter Bleilegierungen (Pb—Sn—As-Leg.) als haftverbessernde Zwischenschicht vor dem Verbleien im Schmelzfluß untersucht. Die Technologie der einschlägigen Arbeitsverfahren, insbesondere die der Knapp Mills Inc. und der Broken Hill Ass. Lead Smelters, wird in Wort und Bild dargestellt.
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    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 722-725 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: The differential etchin effect of hydrofluoric and hydrochloric acid on aluminiumWhilst the etching effect of hydrochloric acid on aluminium takes the form of pronounced surface roughness, that of hydrofluorid acid merely takes the form of a shallow erosion of metal; this phenomenon can be explained by two different reaction mechanisms:With hydrochloric acid, because of the anodic polarisation of the aluminium surface, the chlorine ions penetrate into weak zones of the oxide film, and the hydrogen ions are discharged at cathodic points (e.g. crystalline impurities in the aluminium surface).With hydrofluoric acid, on the other hand, the hydrogen ions penetrate the entire surface of the oxide film evenly, but the ion charges are exchanged without the intervention of cathodic points.This difference in the reaction mechanisms is ascribed to the lower penetration capacity o f the fluorine ion into the oxide film. In this connection, it is assumed that the fluorine ion is either, like un-dissociated hydrofluoric acid, present as a polymer, or that it possesses a larger hydrate shell than the chlorine ion.The different reaction mechanisms are discussed.
    Notes: Die Erscheinung, daß bei der Ätzung von Aluminium mit Salzsäure eine starke Oberflächenaufrauhung, bei der Verwendung von Flußsäure dagegen nur eine flache Metallabtragung erfolgt, wird durch zwei verschiedene Reaktionsmechanismen erklärt:In Salzsäure dringen infolge der anodischen Polarisation der Aluminiumoberfläche die Chlorionen an schwachen Stellen der Oxidschicht ein, wobei sich die Wasserstoffionen an kathodischen Stellen (z. B. Fremdkristallen in der Aluminiumoberfläche) entladen.In Flußs'säure dagegen wird über die gesamte Oberfläche hinweg die Oxidschicht von den Wasserstoffen gleichmäßig durchdrungen, doch erfolgt dann der Austausch ihrer Ladungen ohne die Vermittlung kathodischer Stellen.Diese unterschiedlichen Reaktionsmechanismen erklärt man mit dem geringeren Eindringungsvermögen des Fluorions in die Oxidschicht. Dabei wird angenommen, daß das Fluorion entweder wie die undissoziierte Flußsäure polymer vorliegt oder daß es eine größere Hydrathülle als das Chlorion besitzt.Die verschiedenen Reaktionsmechanismen werden nachgewiesen.
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    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 753-753 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 922-922 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 89-91 
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    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
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    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 94-96 
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    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
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    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 101-103 
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    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
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    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 104-105 
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    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
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    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 107-109 
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    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
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    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 177-179 
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    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
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    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 182-185 
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    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
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    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 192-192 
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    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 192-192 
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    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
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    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 192-192 
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    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
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    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 172-173 
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    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
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    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 180-180 
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    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
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    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 181-181 
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    Source: Wiley InterScience Backfile Collection 1832-2000
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    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 186-192 
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    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 192-192 
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    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 192-192 
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    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 192-192 
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    Source: Wiley InterScience Backfile Collection 1832-2000
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    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 193-193 
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    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 193-193 
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    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 194-199 
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    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Additional Material: 3 Ill.
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    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 200-200 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964) 
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    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
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    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 221-227 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Investigation on the influence of household detergents on metals, and of metals on household detergents. Third communication Metallographical investigations on the corrosivity of aluminium bronzesIn the second communication, the behaviour of aluminium bronzes in four different detergents was investigated. The test results gave rise to the conclusion that the corrosion rate differs depending on the condition of the structure.The investigations were carried out with AlBz 9, Aeterna AF 50, AlMBz 10 and Aeterna W II A.By means of heat treatment, a defined α + β- and α + γ2 structure was obtained. These specimens were then boiled in detergents for different periods of time, and the surface was photographed with an enlargement of 100 or 500 times.It was found that the corrosion caused by detergents is similar to the corrosion caused by a 10 per cent. ammonium persulphate solution. The α + γ2 structure shows a somewhat higher corrosion resistance than the α + β structure.
    Notes: In der 2. Mitteilung wurde das Verhalten von Al-Bronzen in 4 verschiedenen Waschmitteln untersucht. Aus den Versuchsergebnissen konnte geschlossen werden, daß je nach Gefügezustand die Korrosionsgeschwindigkeit unterschiedlich groß ist. Untersucht wurden: AlBz 9, Aeterna AF 50, AlMBz 10 und Aeterna w II A.Durch Wärmebehandlung wurde definiertes α + β bzw. α + γ2-Gefüge erzielt. Diese Proben wurden dann in Waschmitteln verschiedene Zeiten gekocht und Oberflächenaufnahmen mit 100- und 500- facher Vergrößerung hergestellt.Es zeigte sich, daß der Ätzangriff durch Waschlaugen so verläuft wie der Ätzangriff durch 10%ige Ammoniumpersulfat-Lösung.Das α + γ2-Gefüge ist gegen den Waschmittelangriff etwas beständiger als das α + β-Gefüge.
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    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 201-212 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Control measurements on cathodically protected pipelinesThe most important control measurement for the cathodic protection of buried pipelines is the measurement of the pipel soil potential. On the strength of experimental and theoretical investigations, it is possible to indicate safe protection potentials at which the corrosion rate becomes practically insignificant. In applying the scientific results of electro-chemistry to cathodic protection in practice, problems may be encountered if phenomena are over-simplified or if local conditions are not sufficiently taken into account.Such practical problems are not so much concerned with measuring instruments and reference electrodes; they are more associated with the measuring methods subsequently described and with the fact that influence factors difficult to ascertain must be taken into account.The cathodic polarisation at the metal surface to be protected is composed of overtensions of a penetration and a diffusion type. In addition, there occurs a resistance polarisation which may be governed, on the one hand, by the ohmic voltage drop between pipe surface and reference electrode and, on the other hand, by poorly conducting coating or insulating layers. The latter usually cause, at the same time, a change in the diffusion type overtension. Since the resistance polarisation does not partake in the reaction kinetics, this influence must be eliminated in measuring the protection potential. Since the different types of polarisation have different type curves, it is possible to ascertain the separate partial reactions in accordance with the normal methods of electro-chemistry. By means of oscillographic recordings of potential/time curves, through calculation or with the aid of suitable measuring bridges, it is possible to eliminate the resistance polarisation or to determine the ohmic voltage drop in the electrolyte.
    Notes: Die wichtigste Kontrollmessung für den kathodischen Schutz erdverlegter Rohrleitungen ist die Messung des Rohr/Boden-Potentials. An Hand experimenteller und theoretischer Untersuchungen ist es möglich, sichere Schutzpotentiale anzugeben, bei denen die Korrosionsgeschwindigkeit praktisch bedeutungslos wird. Bei der Anwendung wissenschaftlicher Ergebnisse der Elektrochemie auf den kathodischen Schutz in der Praxis können Probleme auftreten, wenn Vorgänge zu stark vereinfacht und örtliche Gegebenheiten nicht genügend berücksichtigt werden.Solche praktischen Probleme liegen weniger bei Meßgeräten und Bezugselektroden, als bei den anschließend beschriebenen Meßverfahren und der Berücksichtigung schwer erfaßbarer Einflußgrößen. Die kathodische Polarisation an der Zu schützenden Metalloberfläche Setzt sich aus einer Durchtritts- und einer Diffusionsüberspannung zusammen. Ferner tritt eine Widerstandspolarisation auf, die einerseits durch den Ohmschen Spannungsabfall zwischen Rohroberfläche und Bezugselektrode, andererseits durch schlecht leitende Deck- oder Isolierschichten gegeben sein kann. Letztere verursachen meist gleichzeitig eine Änderung der Diffusionsüberspannung. Da die Widerstandspolarisation keinen Anteil an der Reaktionskinetik besitzt, muß ihr Einfluß bei der Schutzpotentialmessung eliminiert werden. Auf Grund eines zeitlich unterschiedlichen Verhaltens der Polarisationsarten gelingt die Aufspaltung der einzelnen Teilreaktionen nach den in der Elektrochemie üblichen Verfahren. Durch oszillographische Aufnahme won Potential-Zeitkurven, durch Rechnung oder mit geeigneten Meßbrücken kann die Widerstandspolarisation ausgeschaltet bzw. der Ohmsche Spannungsabfall im Elektrolyten ermittelt werden.
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    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 237-237 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 238-242 
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    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 243-251 
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    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 252-252 
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    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 253-260 
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    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 261-279 
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    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 280-288 
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    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. XXXV 
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    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 971-972 
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    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 289-289 
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    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 289-291 
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    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 1000-1007 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 1008-1009 
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    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
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    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 995-1000 
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    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: New duroplastic coating materials for extreme thermal and chemical conditionsUp to now, the permeability to water vapour of organic coating materials such as duroplastics, thermoplastics and elastomers has given rise, within the condensation phase zone, to considerable destruction, beginning with more or less pronounced blister formation.The application of organic coating materials has therefore been confined to those spheres where nonaqueous media or a negative heat differential are encountered, i.e. where the temperature of the base material to be coated is higher than that of the aqueous medium on the coated side. If the heat differential is in the opposite direction, the water vapour will, because of the prevailing partial pressure, permeate the organic coating and irreversibly condense on the metal base.To eliminate these consequences and to obtain a permanent protection, the types named have been developed. These are absolutely proof to water vapour diffusion and remain, with any temperature differential, within their thermal capacity without causing damage in the form of blisters.In the present article, this development and the practical applications are described on the basis of results obtained in industrial practice.
    Notes: Die Tatsache der Wasserdampfdurchlässigkeit von organischen Beschichtungswerkstoffen, wie Duroplasten, Thermoplasten und Elastomeren führte bisher im Bereich der Kondensationsphase zu erheblichen Zerstörungen, beginnend mit mehr oder weniger starker Blasenbildung.Der Einsatz von organischen Beschichtungswerkstoffen blieb deshalb auf jene Anwendungsgebiete beschränkt, wo nichtwäßrige Medien oder ein negatives Wärmegefälle vorliegt, d. h., wenn die Temperatur des beschichteten Grundwerkstoffes höher ist als die des wäßrigen Mediums auf der beschichteten Seite. Verläuft das Wärmegefälle in entgegen gesetztem Sinne, so durchwandert der Wasserdampf auf Grund des vorherrschenden Partialdruckes die organische Beschichtung und kondensiert irreversibel auf dem metallischen Untergrund.Um diese Folgeerscheinungen auszuschalten und eine dauerhafte Schutzwirkung zu erzielen, wurden die Typen entwickelt. Diese sind absolut wasserdampf-diffusionsfest und bleiben bei jedem Temperaturgefälle innerhalb ihrer thermischen Belastbarkeit ohne Schäden in Form von Blasenbildung.Die vorliegende Arbeit beschreibt diese Entwicklung und die praktische Nutzanwendung an Hand ermittelter Ergebnisse in industriellen Einsatz.
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    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 1038-1046 
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    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
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    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 1051-1052 
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    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 1062-1068 
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    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 1068-1068 
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    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 1068-1068 
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    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 573-577 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 555-562 
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    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: The corrosion behaviour of lead and lead alloys in sulphuric acid solutionsLong-time corrosion tests have been carried out in sulphuric acid solutions of different concentration (up to 70 per cent.) and at different temperatures (up to boiling point), using specimens of fine lead, copper fine lead and different types of hard lead. The only noticeable, and noticeably different, corrosion rates were encountered at temperatures above 100% c.In the medium 'and high concentration range, fine lead and, to a lesser extent, even copper fine lead were increasingly affected by corrosion; in agreement with published data, the corrosion values especially of fine lead showed a marked scatter and some of them were extremely high. Hard lead with 1.5 to 6 percent. antimony was less affected by the highly concentrated acids; but low-alloyed hard lead, showed, a maximum corrosion, rate in diluted acid. The comparatively highest resistance was shown by hard lead with 6 percent. antimony which showed noticeable corrosion under the influence of the strongest acid only (70 percent. H2SO4). A particularly high resistance in this acid was shown by a copper hard lead (0.6 percent antimony).Boiling tests on a minor technical scale with steel pots with homogeneous internal lead coating revealed a surprisingly high corrosion resistance of the lead coating, which consisted of copper lead, even in 70 percent acid heated to 150° C; such resistance was not to be expected from the preceding tests and exceeded that encountered with hard lead (6 percnt. SB) A chemical analysis showed that copper lead coating must, during manufacture, have absorbed tin, and subsequent tests showed that a small admixture of tin results in quite a considerable increase in the corrosion resistance of the copper lead. An increased copper content, too, had a favourable effect but only in the strongest acid.Finally, a number of tests were carried out in order to ascertain the influence, on the corrosion performance of some types of lead, of an admixture of nitric acid to the sulphuric acid (70 percent.). In all cases, the admixture had the effect of reducing the corrosion rate, especially with copper lead.The conclusions to be drawn from the test results in regard to corrosion tests and work practice are discussed.
    Notes: Langzeit-Korrosionsversuche wurden in Schwefelsäurelösungen verschiedener Konzentration (bis 70 %) und Temperatur (bis Siedepunkt) an Proben aus Feinblei, Kupferfeinblei und verschiedenen Hartbleisorten durchgeführt. Dabei ergaben sich merkliche und unterschiedlich große Korrosionsgeschwindigkeiten nur bei Temperaturen oberhalb 100° C.Feinblei und in geringerem Maß auch Kupferfeinblei wurden im mittleren und höheren Konzentrationsbereich zunehmend stärker korrodiert, wobei  -  in Übereinstimmung mit Literaturangaben  -  namentlich bei Feinblei stark streuende und z. T. außerordentlich hohe Korrosionswerte erhalten wurden. Hartblei mit 1,5 bis 6 % Sb wurde von den stärkeren Säuren weniger angegriffen, dagegen zeigte niedriglegiertes Hartblei ein Korrosionsmaximum in verdünnter Säure. Verhältnismäßig am beständigsten erwies sich Hartblei mit 6% Sb, das nur in der stärksten Säure (70 % H2SO4)merklich korrodiert wurde. In dieser war ein CU-Hartblei (0,6 % Sb) besonders beständig.Kleintechnische Kochversuche an innen homogenverbleiten Stahltöpfen ergaben ein überraschend gutes Korrosionsverhalten der aus Kupferblei bestehenden Verbleiung auch in 15O° C heißer 70°/oiger Säure das nach den vorhergehenden Versuchen nicht zu erwarten war und dasjenige der mit Hartblei (6% Sb) ausgekleideten Töpfe übertraf. Durch Analysen wurde festgestellt, daß die Kupferverbleiung offenbar bei der Herstellung Zinn aufgenommen hatte, und durch Versuche wurde gezeigt, daß ein geringer Zinngehalt die Beständigkeit des Kupferbleis ganz beträchtlich verbessert. Auch ein erhöhter Cu-Gehalt wirkte sich günstig aus, jedoch nur in der stärksten Säure.Schließlich wurde in einigen Versuchen der Einfluß eines Salpetersäurezusatzes zur Schwefelsäure (70%) auf das Korrosionsverhalten einiger Bleisorten geprüft. In allen Fällen verminderte er die Korrosion, besonders stark bei Kupferblei.Die aus den Versuchsergebnissen sich ergebenden Folgerungen für die Korrosionsprüfung und Betriebspraxis werden erörtert.
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    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 333-335 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. XXXVIII 
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    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 616-616 
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    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
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  • 298
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
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  • 299
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
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  • 300
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
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