XPS STUDY OF SURFACE-FILM ON NICKEL-ALLOYS IN HOT CONCENTRATED NAOH

被引：23

作者：

HASHIMOTO, K

ASAMI, K

机构：

[1] The Research Institute for Iron, Steel and Other Metals, Tohoku University, Sendai

来源：

CORROSION SCIENCE | 1979年 / 19卷 / 06期

关键词：

D O I：

10.1016/0010-938X(79)90041-6

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

X-ray photo-electron spectroscopy has been used to investigate the composition of surface films formed on Alloy 600 and Alloy 800 in 50wt. %NaOH at 120°C as a function of polarization potential. Anodic polarization from the corrosion potential successively revealed the active, primary passive, transpassive and secondary passive regions. The formation of hydrated chromium oxy-hydroxide resulted in the primary passivation; the chromium content in the passive film increased with the rise in potential. The transpassive reaction led to an abrupt decrease of chromium in the film with a consequent increase in nickel. The secondary passive film was composed exclusively of nickel hydroxide which transformed to hydrated nickelous oxy-hydroxide with an increase in potential. © 1979.

引用

页码：427 / 435

页数：9

共 31 条

[1] X-RAY PHOTOELECTRON-SPECTRUM OF FE2+ STATE IN IRON OXIDES [J].