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  • 101
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 6 (1955), S. 507-507 
    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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  • 102
    Electronic Resource
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 6 (1955), S. 511-511 
    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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  • 103
    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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  • 104
    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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  • 105
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 6 (1955), S. 520-520 
    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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  • 106
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 6 (1955), S. I 
    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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  • 107
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 6 (1955) 
    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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  • 108
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 6 (1955), S. 521-523 
    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: Zinc rich paint, a New remarkable Surface ProtectionAt first the well known hot galvanizing methods like the wet and dry, lead-zinc, galvanealing, Crapo and Sendzimir processes are discussed. The review is continued by cold galvanisation, Sheradizing and the galvanizing by flame spraying with electric and autogenic spraying guns. Finally the new zinc rich paint is described. Advantage and disadvantage of all these processes are compared. The article concludes with a charges comparison account of the different galvanizing methods and a list of literature references.
    Notes: Zunächst werden die bekannten Feuerverzinkungsverfahren, wie Naß- und Trockenverfahren, das Blei-Zink-, Galvannealing-, Crapo- und Sendzimir-Verfahren behandelt. Darauf folgt die galvanische Verzinkung, das Sherardisieren und die Verzinkung durch Flammspritzen mit elektrischen und autogenen Spritzpistolen. Anschließend wird der neue Kaltzinkschutz beschrieben. Die Vor- und Nachteile der verschiedenen Verfahren werden gegenübergestellt. Den Schluß bilden ein Kostenvergleich der verschiedenen Verzinkungsarten und ein Schrifttumsnachweis.
    Type of Medium: Electronic Resource
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  • 109
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 6 (1955), S. 523-527 
    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: Cathodic ProtectionThe most important field of application of the cathodic protection is the protection of buried pipe lines. Good protection will be achieved if the potential of the pipe against its surrounding material is -0,85 V  -  measured by means of a Cu/CuSO4 electrode. Soils of low specific resistance of about 1000 ω/cm are very aggressive while those of more than 10 000 ω/cm are fairly incorrosive. The arrangement of graphite anodes with extern sources of electricity and of Mg- or Zn anodes is discussed. The pipes should be insulated with impregnated strips as under these conditions only low current densities are necessary to achieve a good protection.
    Notes: Das wichtigste Anwendungsgebiet des kathodischen Korrosionsschutzes ist der Schutz von Rohrleitungen im Erdboden. Ein guter Schutz wird erreicht, wenn das Potential des Rohres gegenüber der Umgebung  -  gemessen mit Cu/CuSO4-Elektrode  -  einen Wert von -0,85 V erreicht. Böden mit geringem Widerstand von etwa 1000 ω/cm greifen stark an, bei mehr als 10 000 ω/cm ist kein Angriff zu befürchten. Die Anordnung von Graphitanoden mit äußeren Stromquellen und von Mg- oder Zn-Anoden (Opferanoden) wird besprochen. Außerdem sollte stets für eine gute Isolierung der Rohre mit imprägnierten Streifen gesorgt werden, da dann nur geringe Ströme zum Schutz erforderlich sind.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
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  • 110
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 6 (1955), S. 538-541 
    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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  • 111
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 6 (1955), S. 527-535 
    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: On the Electrochemical Measurement of Oxygen by the Method of F. Tödt1. Method of measurement.  -  A noble metal electrode is the cathode which is in galvanic connection with an impolarizable anode. Under suitable conditions (suitable potential) an oxygen limiting current flows. It is proportional to the concentration of oxygen of the electrolyte.  -  2. The hydrogen and oxygen currents are always superposed. The amount of the hydrogen current depends on the potential of the cathode and its hydrogen overvoltage. 3. Selection of electrolytes.  -  Alkaline solutions afford good results as the oxygen wave is wider than in acid solutions. The use of buffer solutions prevents an increase of pH-values on the cathode. 4. Selection of the anode.  -  It is selected according to the required potential of the cathode. 5. Selection of the cathode.  -  6. Selection of the measuring instrument.  -  7. Dependence of temperature.  -  It is resulting from the dependence of temperature of the coefficient of diffusion and of the solubility of oxygen in the electrolyte. 8. Adjustment.  -  By conducting gases or dosing solutions of known concentrations of oxygen or by an electrochemical method. 9. The consumption effect is caused by the consumption of oxygen in the electrolyte by the flowing current. The consumption obeys a time equation
    Notes: 1. Meßmethode.  -  Eine unangreifbare Elektrode wird als Kathode benutzt. Sie ist mit einer unpolarisierbaren Anode galvanisch verbunden. Unter geeigneten Bedingungen (geeignetes Potential) fließt ein Sauerstoff-Diffusionsgrenzstrom, der der Sauerstoffkonzentration im Elektrolyten proportional ist. 2. Der Wasserstoffstrom ist stets dem Sauerstoffstrom überlagert. Seine Größe hängt vom Potential der Kathode und der Wasserstoffüberspannung der Kathode ab. 3. Wahl des Elektrolyten.  -  Alkalische Löungen liefern günstige Ergebnisse, da das Diffusionsgrenzstromgebiet breiter als in saurer lösung ist. Die Verwendung von Pufferlösungen verhindert ein Ansteigen des pH-Wertes an der Kathode. 4. Wahl der Anode.  -  Sie erfolgt entsprechend dem erforderlichen Potential der Kathode. 5. Wahl der Kathode.  -  6. Wahl des Meßinstrumentes. 7. Temperaturabhängigkeit.  -  diese ist durch die Temperaturabhängigkeit des Diffusionskoeffizienten und der Lößlichkeit des Sauerstoffs im Elektrolyten bedingt. 8. Eichen.  -  Durch Einleiten von Gasen oder durch Zudosierung von Lösung mit bekanntem Sauerstoffgehalt oder nach einer elektrochemischen Methode. 9. Zehrungseffekt  -  stellt einen Sauerstoffverbrauch im Elektrolyten durch den fließenden strom dar, der einem Zeitgesetz folgt.
    Additional Material: 12 Ill.
    Type of Medium: Electronic Resource
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  • 112
    Electronic Resource
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 6 (1955), S. 541-543 
    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
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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  • 113
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    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 6 (1955), S. 544-545 
    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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  • 114
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    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 6 (1955), S. 535-538 
    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 Effect of Light on the Solubility of Copper in electrolytesA survey of the relationship between the photo- and electrochemical reactions in the corrosion of copper is given. On the surface of copper electrodes in a HCl-HNO3-solution photo sensitive covers are formed. If you expose a copper electrode of a certain size, immersed into a 0,1 n KCl solution, to light and keep an other electrode of the same size and in the same solution in darkness a current of about 0,2 mA flows from one electrode to the other. The differences of the solubility of exposed and not exposed copper electodes in 0,1-0,001 n KCl solutions are represented in a diagram. The solubility of the exposed copper electrode is severely inhibited if 1 ccm of a 0,001 m FeSO4 solution is added to the used 0,001 n KCl solution. The sensitivity of ironsalts to visible light causes the formation of a more stable system obeying the equation Fe″ + Cu″ + hv Fe‴ + Cu′.
    Notes: Überblick über den Zusammenhang zwischen photochemischen und elektrochemischen Reaktionen bei der Korrosion des Kupfers. In einer HCl-HNO3-Lösung bilden sich auf der Oberfläche von Kupferelektroden lichtempfindliche Überzüge aus. Setzt man eine Cu-Elektrode von bestimmter Oberfläche in 0,1 n-KCl der Einwirkung einer Lichtquelle aus, während man eine gleichgroße Cu-Elektrode in 0,1 n-KCl in Dunkelheit hält, so fließt zwischen beiden Elektroden ein strom von etwa 0,2 mA. Die zwischen der belichteten und der unbelichteten Cu-Elektrode in 0,1 bid 0,001 n-KCl-Lösung auftretenden Löslichkeitsunterschiede wurden graphisch dargestellt. Nach Zugabe von 1 ml 0,001 m-FeSO4 zu der 0,01 n-KCl ist die Löslichkeit der belichteten Cu-Elektrode verhältnismäßig stark gehemmt, die Lichtempfindlichkeit der Eisensalze gegen sichtbares Licht bewirkt die Bildung eines stabileren Systems, das sich durch die Gleichung Fe″ + Cu″ + hv ⇌ Fe‴ + Cu′ wiedergeben läßt.
    Additional Material: 5 Ill.
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  • 115
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 6 (1955), S. 548-549 
    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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  • 116
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 6 (1955), S. 546-547 
    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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  • 117
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 6 (1955), S. 549-550 
    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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  • 118
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 6 (1955), S. 551-553 
    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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  • 119
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 6 (1955), S. 554-554 
    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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  • 120
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 6 (1955), S. 554-554 
    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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  • 121
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 6 (1955), S. 554-554 
    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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  • 122
    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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  • 123
    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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  • 124
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 6 (1955), S. 555-555 
    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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  • 125
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 6 (1955), S. 555-566 
    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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  • 126
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 6 (1955), S. 566-568 
    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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  • 127
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 6 (1955), S. 568-568 
    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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  • 128
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 6 (1955), S. 555-555 
    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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  • 129
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 6 (1955), S. I 
    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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  • 130
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 6 (1955) 
    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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  • 131
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 6 (1955), S. 569-571 
    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: A contribution Relating to the Execution of Corrosion TestsThere is a description of an apparatus for the automatic control of the temporal progress of corrosion of a specimen in a constant amount of electrolyte and in absence of a gas phase. A polarographic control is used. The specimen rotated magnetically from outside the cell will corrode also under a controlled polarization. The described apparatus is especially adapted for the investigation of the consumption of oxygen of the electrolyte.
    Notes: Es wird ein Gerät beschrieben, das zur automatischen Beobachtung des zeitlichen Verlaufs der in einem konstanten Flüssigkeitsvolumen bei Abwesenheit einer Gasphase stattfindenden Korrosion bestimmt ist. Das angewandte Kriterium ist das polarographische. Die Versuchsprobe, die magnetisch von außen in Drehung versetzt wird, kann auch unter einer kontrollierten Polarisation der Korrosion ausgesetzt werden. Die Versuchsvorrichtung ist für die Erforschung des Verbrauchs an in der Lösung vorhandenem Sauerstoffs besonders geeignet.
    Additional Material: 3 Ill.
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  • 132
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 6 (1955), S. 577-580 
    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 Progress in ElectroplatingThe article contains a concise survey of the postwar progress in electroplating. Bright and levelling deposits, automatic plants, degreasing, nickel, zinc, chrome, cadmium, passivation, brass, tin, silver, indium, nickel substitutes, anodic brightening and standardization are discussed among others.
    Notes: Die Arbeit gibt in gedrängter Form einen Überblick über die wichtigsten seit Kriegsende in der Galvanotechnik erzielten Fortschritte. Behandelt werden u. a.: hochglänzend abgeschiedene und einebnende Überzüge, automatische Anlagen, Entfettung, Nickel, Chrom, Zink, Cadmium, Passivierung, Messing, Zinn, Silber, Indium, Ersatz für Nickel, anodisches Glänzen, Normung.
    Additional Material: 4 Ill.
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  • 133
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 6 (1955), S. 575-577 
    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 Behavior of Plastics upon Mineral OilsThe behavior of plastics upon mineral oils is of special importance as they are gaining increasing application as building and constructing materials. The behavior depends essentially on the nature of the macromolecular plastic and the filling material as well as on the nature of the mineral oil, the duration of action and temperature. The resistance of many thermoplastic materials and rubber goods to oil is decreased considerably at higher contents of aromatic substances of the mineral oil.The behavior of the most important plastics upon oils of different composition is reported. Special importance has been given to the standardization of the experimental conditions.
    Notes: Angesichts der steigenden Verwendung von Kunststoffen als Bau- und Konstruktionsmaterial kommt ihrem Verhalten gegen Mineralöle besondere Bedeutung zu. Dieses Verhalten wird sowohl durch die Art des hochmolekularen Kunststoffes und verschiedene Füll- und Zusatzstoffe als auch durch die Natur des Mineralöles, die Einwirkungsdauer und Beanspruchungstemperatur wesentlich beeinflußt. So ist insbesondere festzustellen, daß höhere Aromatengehalte im Mineralöl die Ölbeständigkeit vieler thermoplastischer Kunststoffe und Gummiwerkstoffe beträchtlich herabsetzen.Es wird über das Verhalten der wichtigsten Kunststoffe gegenüber Ölen verschiedenere Zusammensetzung berichtet, wobei auf die genaue Festlegung der Versuchsbedingungen besonderer Wert gelegt wird.
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  • 134
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 6 (1955), S. 582-584 
    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 6 (1955), S. 585-588 
    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
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    Materials and Corrosion/Werkstoffe und Korrosion 6 (1955), S. 571-575 
    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: Zinc Dust CompoundsZinc dust compounds are consisting chiefly of zinc dust and small amounts of an adhesive and a solvent. The dry film should contain of 94 per cent of zinc dust at least. Under these conditions the particles are in metallic contact with each other as well as with the metal surface.The anti-corrosive properties of zinc dust compounds are due to cathodic protection as well as to sealing off the atmosphere. The cover becomes more compact by the formation of insoluble zinc salts which increase the anti-corrosive properties. Damaged spots of zinc dust compounds films in sea water prove better anti-corrosive properties than those of minium films. These products could also be applied to slightly rusted steel surfaces without any danger of under rusting. They are generally less surface sensitive than the usual anti-corrosive paints. Examples in practice prove their great possibilities of use. These compounds have proved to be good not only on iron and steel but also in the reconditioning of old hot galvanized constructions which had been exposed to atmosphere for a longer time.
    Notes: Zinkstaubkompounds sind Produkte, welche vorwiegend Zinkstaub und daneben kleinere Mengen eines Bindemittels und Lösungsmittel erhalten. Im trocknen Film sollen mindestens 90% Zinkstaub vorhanden sein.Hiermit wird erreicht, daß die Teilchen in metallischem Kontakt miteinander somit der Metalloberfläche stehen.Die Rostschutzwirkung der Zinkstaubkompounds beruht auf einem kathodischen Schutz sowie auf der Abdichtung des Untergrundes von der Atmosphäre. Die Schicht wird nämlich durch Bildung unlöslicher Zinksalze verdichtet und deren Schutzwirkung dadurch noch gesteigert. Im Meereswasser zeigen Zinkstaub-Kompounds einen höheren Rostschutz als Bleimennige bei beschädigten Stellen im Film. Auch auf leicht gerosteten Stahloberflächen lassen sich diese Produkte aufbringen, ohne daß die Gefahr der Unterrostung besteht.Sie sind also im allgemeinen weniger oberflächenempfindlich als die normalen Rostschutzfarben. Beispiele aus der Praxis zeigen ihre beachtlich weiten Anwendungsmöglichkeiten.Nicht nur auf Eisen und Stahl, sondern auch für die Aufarbeitung alter feuerverzinkter Konstruktionen, welche seit längerer Zeit der Atmosphäre ausgesetzt waren, haben die Kompounds sich bewährt.
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    Materials and Corrosion/Werkstoffe und Korrosion 6 (1955), S. 580-581 
    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: Model Tests for Investing Cathodic Protection in SoilTo clear the mechanisms of the corrosion processes of buried metals corrosion tests were carried out under varying conditions of the water-air-concentration by means of model cells; these cells consisted of two electodes of different metals of the same size. Iron being in metallic connection with zinc was found to be nearly totally protectable under increased attack of the zinc as the base electrode if the corrosion takes place under lack of oxygen; which means that the accession of oxygen to the electrode is hindered by saturation of the soil with water.
    Notes: Zur Klärung der an metallen im Erdreich ablaufenden Korrosionsvorgänge wurden an Modellelementen, die aus zwei verschiedenen Metallen mit gleich großer Oberfläche bestanden, unter verschiedenen Verhältnissen von „ Wasser zu Bodenluft“ Korrosionsversuche durchgeführt. Dabei wurde festgestellt, daß man Eisen, das mit Zink in leitender Verbindung steht, bei verstärktem Angriff des Zinks als unedle Elektrode fast vollständig schützen kann, wenn der Korrosionsvorgang unter Sauerstoffmangel abläuft; der Sauerstoffzutritt zu den Elektroden also durch eine Sättigung des Erdreichs an Wasser gehindert ist.
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    Materials and Corrosion/Werkstoffe und Korrosion 6 (1955), S. 589-594 
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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: 2 Tab.
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    Materials and Corrosion/Werkstoffe und Korrosion 6 (1955), S. 595-598 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Materials and Corrosion/Werkstoffe und Korrosion 6 (1955), S. 605-606 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Materials and Corrosion/Werkstoffe und Korrosion 6 (1955), S. 603-605 
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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 6 (1955), S. 599-602 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Materials and Corrosion/Werkstoffe und Korrosion 6 (1955), S. 607-611 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Materials and Corrosion/Werkstoffe und Korrosion 6 (1955), S. 611-611 
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    Materials and Corrosion/Werkstoffe und Korrosion 6 (1955), S. 611-612 
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    Materials and Corrosion/Werkstoffe und Korrosion 6 (1955), S. 612-612 
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    Materials and Corrosion/Werkstoffe und Korrosion 6 (1955), S. 612-613 
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    Materials and Corrosion/Werkstoffe und Korrosion 6 (1955), S. 613-613 
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    Materials and Corrosion/Werkstoffe und Korrosion 6 (1955), S. 613-613 
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    Materials and Corrosion/Werkstoffe und Korrosion 6 (1955), S. 614-616 
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    Materials and Corrosion/Werkstoffe und Korrosion 6 (1955), S. I 
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    Materials and Corrosion/Werkstoffe und Korrosion 6 (1955), S. 616-616 
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    Materials and Corrosion/Werkstoffe und Korrosion 6 (1955), S. 616-616 
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    Materials and Corrosion/Werkstoffe und Korrosion 6 (1955), S. 618-648 
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    Materials and Corrosion/Werkstoffe und Korrosion 6 (1955), S. 617-617 
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    Materials and Corrosion/Werkstoffe und Korrosion 6 (1955), S. 649-665 
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    Materials and Corrosion/Werkstoffe und Korrosion 6 (1955), S. 683-702 
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    Materials and Corrosion/Werkstoffe und Korrosion 6 (1955), S. 703-703 
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    Materials and Corrosion/Werkstoffe und Korrosion 6 (1955), S. 682-682 
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    Materials and Corrosion/Werkstoffe und Korrosion 6 (1955), S. 666-681 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Materials and Corrosion/Werkstoffe und Korrosion 6 (1955), S. 704-704 
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    Materials and Corrosion/Werkstoffe und Korrosion 6 (1955) 
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    Materials and Corrosion/Werkstoffe und Korrosion 6 (1955), S. 705-716 
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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 6 (1955), S. 369-369 
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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 6 (1955), S. 369-374 
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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 of Alloyed Steels and Nickel alloys by Phosphoric AcidPhosphoric acid gains a permanently increasing industrial importance. But the knowledge of its corrosive effects especially upon the industrially important normal stainless steels are very incomplete as proved by a short review of the concerned literature. Therefore investigations on the corrosion of high alloyed steels and modern nickel alloys (containing Mo) were carried out over the whole range of concentration and temperature up to the atmospheric boiling point. The obtained corrosion data are represented in chart form. The corrosion resistance regions are delineated by isocorrosion lines.At high temperatures and concentrations the corrosion by phosphoric acid is so vigorous that the nickel molybdenum alloy 70/30 only is considered to be practically unaffected. In the great range of concentration and temperature below 100 centigrades are great regions of excellent or even absolute resistance to corrosion for many materials. In the range above 100 centigrades some Mo and Cu containing Cr-Ni-Steels are fairly resistant up to considerable high temperatures.
    Notes: Die Phosphorsäure gewinnt technisch eine dauernd steigende Bedeutung, jedoch sind, wie eine kurze Literaturübersicht zeigt, die Kenntnisse über ihre korrodierende Wirkung besonders auf die technisch wichtigen normalen korrosionsbeständigen Stähle recht lückenhaft. Daher wurde mit den hoch legierten Stählen und den modernen Nickellegierungen (Mo-haltig) eine Korrosionsuntersuchung über das gesamte Temperatur-Konzentrationsgebiet bis zu den atmosphärischen Siedepunkten durchgeführt. Die Resultate wurden in Form von Korrosionsdiagrammen dargestellt, wobei die Beständigkeitsgebiete durch Isokorrosionslinien abgegrenzt werden.Die Korrosion durch Phosphorsäure ist bei hohen Temperaturen und Konzentrationen sehr stark, so daß schließlich nur noch die Ni-Mo-Legierungen 70/30 als praktisch vollkommen beständig anzusehen sind. In dem großen Temperatur-Konzentrationsgebiet unter 100°C sind jedoch bei vielen Werkstoffen große Gebiete vollkommener oder auch absoluter Korrosionsbeständigkeit vorhanden. In dem Gebiet über 100°C sind einige Mo- und Cu-haltige Cr-Ni-Stähle bis zu ziemlich hohen Temperaturen ausreichend beständig.
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    Materials and Corrosion/Werkstoffe und Korrosion 6 (1955), S. 375-385 
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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 Progress of the Production and Employment of Refined Steel Dead Mold Castings for the Chemical Industry.Modern corrosion- and high temperature-resistant materials and their importance to the chemical industry-Informations on analyses of various especially gravelly steel alloys and high alloyed materials of the stellit and hastelloy groups and titanium.-Time stability factor of hightemperature resistant steel alloys in dependence of temperature and time.  - Description of the technics and employment of the various gravel processes normal and centrifugal casting and the Croning mold casting method and precession casting methods using models which can be molten out.-Coordination of the different methods.
    Notes: Neuzeitliche korrosions- und hochwarmfeste Werkstoffe und ihre Bedeutung für die chemische Industrie  -  Hinweise auf Analysen verschiedener, besonders gießgerechter Stahllegierungen und hochlegierter Werkstoffe der Stellit- und Hastelloy-Gruppe und Titan.  -  Zeitstandfestigkeit hochwarmfester Stahllegierungen in Abhängigkeit von Temperatur und Zeit.Beschreibung der Technik un Anwendung der einzelnen Gießverfahren, normale Formtechnik, Schleudergußverfahren, formmaskenverfahren nach Croning und Präzisionsgußverfahren unter Anwendung ausschmelzbarer Modelle.  -  Abgrenzung der einzelnen Verfahren gegeneinander.
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    Materials and Corrosion/Werkstoffe und Korrosion 6 (1955), S. 385-389 
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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 Sintered Metal Filters and their Structure and Properties and ApplicationThe porous sintered metal filters have been used in the USA for long and lately in Europe too are gaining increasing importance for chemical equipment. The structure of porous sintered metals and the influence of granulation of the used powder on the arrangement of the requested filtering channels are explained to show the possibilities of their application. The to-day available materials and their properties concerning their pressure drop and chemical resistance as well as their mechanical and physical properties are under discussion.Practical examples prove the possibilities of their use. Porous sintered metals can also be used for the diffusing of liquids and gases and seperators and the control of flow of gases and liquids and flash back arrestors.The examples quoted are intendeds to activate interest in the proper use of the improvement of existing equipment by application of porous sintered metals, increase of the industrial efficiency of working processes and of safety, and development of new techniques.
    Notes: Die schon seit längerer Zeit in den USA und neuerdings auch in Europa verwendeten Filter aus porösen Sintermetallen gewinnen steigende Bedeutung für das chemische Apparatewesen. Um die Möglichkeiten ihres Einsatzes zu veranschaulichen, wird der Aufbau poröser Sintermetalle und der Einfluß der kornform der verwendeten Pulver auf die Anordnung der erwünschten Filterkanäle erläutert. Die bis jetzt zur Verfügung stehenden Werkstoffe und ihre Eigenschaften werden hinsichtlich ihres Druckverlustes, der chemischen Beständigkeit, sowie der mechanischen und physikalischen Eigenschaften besprochen.Beispiele aus der Praxis Zeigen die Einsatzmöglichkeiten. Außer für Filter erstreckt sich der Einsatz poröser Sintermetalle auf die Gebiete „gleichmäßige Verteilung von Gasen und Flüssigkeiten“, „Separatoren“, „Mengenbegrenzer“ und „Flammensperren“.Die angeführten Beispiele sollen dazu anregen, die spezifischen Eigenschaften poröser Sintermetalle sinnvoll auszunutzen, z. B. vorhandene Konstruktionen durch Einsatz von porösen Sintermetallen zu verbessern, die Wirtschaftlichkeit von Arbeitsprozessen zu steigern, ihre Betriebssicherheit zu erhöhen oder sogar neue Wege in der Verfahrenstechnik zu erschließen.
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    Materials and Corrosion/Werkstoffe und Korrosion 6 (1955), S. 411-422 
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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 6 (1955), S. 423-436 
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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 6 (1955), S. 437-442 
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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 6 (1955), S. 397-410 
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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: On the Selection of Contact Agent MaterialThe present state of developement of the heterogeneous catalysis is displayed at hand of the latest literature. Special consideration is paid to the relations of the catalytic activity and the structure of catalysis. Contact-potential and electric conductivity and chemisorption measurements as well as the determination of the coefficient of accomodation have been proved good for the research of contact surface process. The Taylor theory of active centres and the balandin “Multiplett” theory and the Schwab “Adlineation” theory are compared with the modern conception of a frequently decicive influence of the electron configuration of a catalyst. The discussion results in new points of view even for the selection of contact agents of industrially important reactions.
    Notes: Anhand der neueren Literatur wird der gegenwärtige Entwicklungsstand auf dem Gebiet der heterogenen Katalyse beschrieben, wobei die Zusammenhänge zwischen der katalytischen Aktivität und der Struktur des katalysators besonders berücksichtigt werden. Als Untersuchungsmethoden für die Vorgänge in der Katalysatoroberfläche haben sich Kontaktpotential-, elektrische Leitfähigkeits- und Chemisorptionsmessungen und die Bestimmung des Akkommodationskoeffizienten besonders bewährt. Die TAYLOR- sche Theorie der „aktiven Zentren“, die Balandinsche „Multiplett-Theorie“ und die Schwabsche „Adlineations-Theorie“ werden der heutigen Auffassung eines vielfach maßgebenden Einflusses der Elektronenkonfiguration eines katalysators gegenübergestellt. Dabei ergeben sich auch für die Auswahl von Kontaktkatalysatoren technisch wichtiger Reaktionen neue Gesichtspunkte.
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    Materials and Corrosion/Werkstoffe und Korrosion 6 (1955), S. 452-452 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Materials and Corrosion/Werkstoffe und Korrosion 6 (1955), S. 443-446 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Materials and Corrosion/Werkstoffe und Korrosion 6 (1955), S. 447-451 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Materials and Corrosion/Werkstoffe und Korrosion 6 (1955), S. 454-460 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Materials and Corrosion/Werkstoffe und Korrosion 6 (1955), S. 453-453 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Materials and Corrosion/Werkstoffe und Korrosion 6 (1955), S. 461-462 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Materials and Corrosion/Werkstoffe und Korrosion 6 (1955), S. 463-463 
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    Materials and Corrosion/Werkstoffe und Korrosion 6 (1955), S. 463-463 
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    Materials and Corrosion/Werkstoffe und Korrosion 6 (1955), S. 464-464 
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    Materials and Corrosion/Werkstoffe und Korrosion 6 (1955), S. 467-468 
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    Materials and Corrosion/Werkstoffe und Korrosion 6 (1955), S. 468-468 
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    Materials and Corrosion/Werkstoffe und Korrosion 6 (1955), S. I 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Materials and Corrosion/Werkstoffe und Korrosion 6 (1955), S. 9-14 
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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 Prevention of Corrosion of Hardware during Storage and ShipmentThe type of corrosion referred to in this article results from failure to remove a11 traces of residual water, pickle, soldering flux, fingerprints, etc., which arise during manufacture. However, in most cases the deciding factor is the quantity of sea water vapour, sulphur oxides or humidity present in the ambient air, as well as the type of material used for packaging. To prevent such corrosion from occuring, packaging materials and containers containing and corrosive agents are used. In most cases, however, protective coatings of mineral oils and greases, usually with an addition of some corrosion inhibitor, are applied. Furthermore, removeable coatings (having a cellulose acetate or butyrate base) are often applied. The articles must be absolutely clean before such coatings can be applied. Finally, the highlights of the pertinent U. S. Government Specifications, which were brought to the lecturer's notice during a recent visit to the U.S.A., are given.
    Notes: Die Ursachen der behandelten Korrosionsart liegen mitunter in Fabrikationsmängeln wie Spülwasser-. Beiz- und Lötmittelrückstanden oder Fingerabdrücken. Meistens sind jedoch der Gehalt der umgebenden Luft an Feuchtigkeit, Schwefeloxyden und Meerwassersprühnebeln oder das Packmaterial entscheidend. Zur Bekämpfung der Korrosion verwendet man Packungen oder Transportbehälter, in denen korrosionsverhütende Verhältnisse bestehen. Meist bringt man jedoch Schutzüberzüge aus Mineralölen oder fetten Ölen auf, die Zusatzmittel, im besonderen Korrosionsinhibitoren, enthalten. Ferner werden abziehbare Überzüge (z. B. auf Celluloseacetat oder -butyralgrundlage) verwendet. Für die Aufbringung der Überzüge müssen die Waren einwandfrei gereinigt sein. Die amerikanischen Spezifikationen für die genannten Schutzverfahren, die der Verfasser bei einer Studienreise näher kennen gelernt hat, werden nach ihren wesentlichen Gesichtspunkten geschildert.
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    Materials and Corrosion/Werkstoffe und Korrosion 6 (1955), S. 15-26 
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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: Solid products of Corrosion as Corrosion-Governing-ElementsCorrosion of metal in aqueous solutions is the result of complicated reactions governed by the electro-chemical properties of the metal and of the electrolytic solution and by the chemical and thermodynamic properties as well as the existing activity and morphological formation of the solid products of corrosion. Exact knowledge of the chemical and physico-chemical properties of the possible solid products of corrosion (oxides, hydroxides, hydroxide-salts) is necessary to understand corrosion in solutions as well as in acid vapours.It is demonstrated by experiments with zinc in sodium chloride solutions how to determine the dispersion and the formation of the products of corrosion by means of microscopes and electronmicroscopes and how to identify these by means of X-ray-photographs and of electron-diffractive spectra. The detailed results show in which way the solid products govern the whole corrosionprocess according to their constitution, formation and dispersal.
    Notes: Der korrosive Angriff eines Metalls in wäßriger Lösung ist das Ergebnis eines komplizierten Zusammenspiels von Faktoren, die durch die elektrochemischen Eigenschaften des Metalls und der Elektrolytlösung bestimmt sind und Faktoren, die gegeben sind durch die chemischen und thermodynamischen Eigenschaften der festen Korrosionsprodukte, sowie deren Reaktionsfähigkeit und morphologische Ausbildung. Voraussetzung für das Verständnis der Korrosionsvorgänge in Lösungen wie in sauren Dämpfen sind genaue Kenntnisse der chemischen und physikalisch-chemischen Eigenschaften der möglichen festen Korrosionsprodukte, Oxyde, Hydroxyde und Hydroxysalze.An einigen Beispielen von Korrosionsversuchen mit Zink in Natriumchloridlösung wird gezeigt, wie mit Hilfe von Mikroskop und Elektronenmikroskop die Verteilung und Ausbildungsform der Korrorionsprodukte festgestellt werden kann und wie diese mit Hilfe von Röntgen- und Elektronenbeugungsaufnahmen identifiziert werden können. Die detaillierten Kenntnisse der Natur der festen Korrosionsprodukte, deren Ausbildungsform und Verteilung lassen erkennen, in welcher Weise diese den ganzen Korrosionsvorgang lenken.
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    Materials and Corrosion/Werkstoffe und Korrosion 6 (1955), S. 33-34 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Materials and Corrosion/Werkstoffe und Korrosion 6 (1955), S. 35-37 
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    Materials and Corrosion/Werkstoffe und Korrosion 6 (1955), S. 38-40 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Materials and Corrosion/Werkstoffe und Korrosion 6 (1955), S. 41-41 
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    Materials and Corrosion/Werkstoffe und Korrosion 6 (1955), S. 42-43 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Materials and Corrosion/Werkstoffe und Korrosion 6 (1955), S. 26-32 
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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: Inhibition and InhibitorsBy corrosion-inhibition is meant every suppression of corrosion of metals or non-metals caused by one or several substances (Corrosion-Inhibitors) in so far these substances are ingredients of the corrosive agent. Corrosion-inhibitors cause the corrosive agent to form preserving films on the surface of the metal. (The film itself is not the inhibitor.)Physical inhibitors block the surface of a metal by adsorption. Chemical inhibitors react upon the surface of the metal forming thin, mostly multimolecular, covers or preserving films (Passivators or Deckschichtenbildner). Other chemical inhibitors do not react upon the surface but upon the corrosive agent (Destimulators). Physical inhibitors are sufficient to block the discharge of ions, which is a step of the corrosion process e. g. corrosion under discharge of hydrogen. Chemical inhibitors are necessary to suppress the passage of electrons from the metal to the ions of the corrosive agent, as is the case with corrosions consuming oxygen. The mechanism of physical and chemical inhibition its existence and use are thoroughly discussed.
    Notes: Unter Korrosions-Inhibition wird jeder Hemmungsvorgang der Korrosion von Metallen (oder Nichtmetallen) verstanden, den ein oder mehrere Stoffe (Korrosions-Inhibitoren) hervorrufen, sofern diese Stoffe in dem chemisch angreifenden Mittel enthalten sind. Korrosions-Inhibitoren bilden also  -  stets aus dem Korrosionsmittel heraus  -  einen schützenden Film auf der Metalloberfläche (nicht der Film selbst ist der Inhibitor).Physikalische Inhibitoren blockieren die Metalloberfläche mittels Adsorption. Chemische Inhibitoren reagieren mit der Metalloberfläche, indem sie dünne (meist mehrmolekulare) Schutzfilme oder Deckschichten bilden (Passivatoren oder Deckschichtenbildner). Chemische Inhibitoren können aber auch schützen, indem sie nicht mit dem Metall, sondern mit dem Korrosionsmittel reagieren (Destimulatoren). Physikalische Inhibitoren reichen bei Ionenübergängen, als Teilvorgängen der Korrosion, aus (z. B. Korrosion unter H-Entwicklung). Zur Hemmung von Elektronenübergängen, wie etwa bei allen Korrosionen unter Verbrauch von O2, sind chemische Inhibitoren notwendig. Der Mechanismus der physikalischen und der chemischen Inhibition, ihr Existenz- und ihr Anwendungsbereich werden eingehend erörtert.
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    Materials and Corrosion/Werkstoffe und Korrosion 6 (1955), S. 44-44 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Materials and Corrosion/Werkstoffe und Korrosion 6 (1955), S. 45-45 
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    Materials and Corrosion/Werkstoffe und Korrosion 6 (1955), S. 46-47 
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