Quantitative Measurements of Passive Dissolution of Chromium, Iron, and Molybdenum from a Stainless Steel

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Abstract
Selective dissolution behavior and concomitant changes in surface composition have been elucidated by combined γ‐spectrometry and ESCA studies of a passive stainless steel immersed in an artificial saliva solution. Quantitative γ‐spectrometry data show that there is a selective dissolution of iron during all times of exposure. Quantitative ESCA data suggest that all expected surface accumulation of chromium occurs in the passive film formed. Under present conditions, the chromium content of the film increases With time of immersion, having its highest values at the outermost surface region and exhibiting a decrease when approaching the film/alloy interface.

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