Hot corrosion behaviour of 2.25Cr-1Mo steel in sulphate-chloride atmosphere

Oxidation of 2.25Cr--1Mo steel and the effect of salt mixtures in enhancing the oxidation rates are reported. Corrodents and test conditions were selected to simulate the conditions in resulting in hot gas corrosion in coal fired superheaters. Kinetic plots for the oxygen uptake revealed the fact th...

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Bibliographic Details
Published in:Journal of materials science letters 1993-08, Vol.12 (15), p.1191-1192
Main Authors: AHILA, S, RADHAKRISHNAN, V. M, RAMAKRISHNA IYER, S
Format: Article
Language:English
Subjects:
Applied sciences
Corrosion
Corrosion environments
Exact sciences and technology
Metals. Metallurgy
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Summary:Oxidation of 2.25Cr--1Mo steel and the effect of salt mixtures in enhancing the oxidation rates are reported. Corrodents and test conditions were selected to simulate the conditions in resulting in hot gas corrosion in coal fired superheaters. Kinetic plots for the oxygen uptake revealed the fact that the coated samples showed more weight gain than uncoated samples. The coated surface was severly degraded after 80 h of exposure showing extensive cracking and spalling of surface layers. Compounds formed on the surface were identified as oxides of iron and chromium using XRD studies
ISSN:0261-8028
1573-4811
DOI:10.1007/BF00274495