Abstract
Abstract Passive layers on various stainless steels were studied with an ion microanalyzer. An argon ion beam was directed on the specimen surface in an oxygen atmosphere. The use of oxygen atmosphere effectively minimized the difference in ion yields of the elements in the oxidized layers and matrices, making it possible to determine these elements with good reproducibility. 18% Cr–8% Ni and 18% Cr–8% Ni–0.4% Ti stainless steel was exposed to neutral water containing 8 ppm oxygen at 289 °C. The passive layers contained larger amounts of iron and smaller amounts of chromium than the matrices.
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