ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
The oxidation behaviour of a Ferritic 10%Cr steel in Ar-H2O mixtures was investigated at 650°C.The studies aimed at elucidating the effect of water vapour content as well as the gas flow rate onthe mechanisms of oxide scale formation. An important observation of the present investigation is,that H2 produced by the reaction of water vapour with the steel, can play a significant role in theoxidation process. It affects the possibility to form an external haematite layer and may alter theoxide scale growth rate. The extend by which the H2 affects the oxidation behaviour depends on thegas flow conditions, the water vapour content and the exposure time. To confirm these observationsa number of specimens were oxidized in Ar-H2-H2O mixtures. This atmosphere guarantees a verylow equilibrium oxygen partial pressure, in which H2 formed by reaction of the gas with the metal,does not substantially alter the thermodynamic properties of the gas
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/13/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.522-523.155.pdf
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