钼
氯化物
点蚀
极化(电化学)
奥氏体
材料科学
腐蚀
冶金
奥氏体不锈钢
阳极
钝化
电极
无机化学
化学
微观结构
复合材料
物理化学
图层(电子)
作者
K. Sugimoto,Yoshinobu Sawada
标识
DOI:10.1016/0010-938x(77)90032-4
摘要
In order to clarify the mechanism for increased resistance to pitting in acid chloride solutions by addition of Me to CrNi stainless steels, the anodic polarization curves, a.c. electrode impedances, ellipsometric parameters and X-ray photo-electron spectra have been measured on the Mo-containing steels passivated in 1N HCl. The results showed that the presence of an adequate amount of Cr is indispensable for the improvement of pitting resistance by the Mo addition. The passive films of the Mo-containing steels were found to be composed of a complex oxyhydroxide containing Cr3+ Fe2+, Ni2+, Mo6+ and Cl− and showed a rather higher d.c. resistance in HCl solution than in H2SO4 solution. The thickness of the passive film increases with increase in Mo content.
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