Microscopic ellipsometric observation of the change in passive film on 18Cr-8Ni stainless steel with the initiation and growth of pit

Changes in passive films on 18Cr--8Ni stainless steel with the initiation and growth of pit have been measured in 1 kmol x m exp --3 NaCl using a microscopic ellipsometer which provides a max. magnification of approx 600 times. The spatial distribution of film thickness within each grain was observe...

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Bibliographic Details
Published in:Journal of the Electrochemical Society 1985-08, Vol.132 (8), p.1791-1795
Main Authors: SUGIMOTO, K, MATSUDA, S, OHIWARA, Y, KITAMURA, K
Format: Article
Language:English
Subjects:
Applied sciences
Corrosion
Corrosion mechanisms
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Materials science
Metals, semimetals and alloys
Metals. Metallurgy
Physics
Specific materials
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Summary:Changes in passive films on 18Cr--8Ni stainless steel with the initiation and growth of pit have been measured in 1 kmol x m exp --3 NaCl using a microscopic ellipsometer which provides a max. magnification of approx 600 times. The spatial distribution of film thickness within each grain was observed on the steel before pit initiation. The first pit initiated at a site where there was a small difference of 0.2-0.5 nm in the film thickness. With the growth of the first pit, film thinning first occurred around the pit, and then film thickening started beneath the pit. The second pit broke out on the boundary between the film thinned area and the original film thickness preserved area. 11 ref.--AA
ISSN:0013-4651
1945-7111
DOI:10.1149/1.2114219