THE ACTIVE PASSIVE TRANSITION IN LOW-ALLOY STEELS IN CARBONATE SOLUTIONS

被引：21
|
作者：
RILEY, AM [1 ]
SYKES, JM [1 ]
机构：
[1] UNIV OXFORD,DEPT MET & SCI MAT,OXFORD OX1 3PH,ENGLAND
来源：
ELECTROCHIMICA ACTA | 1990年 / 35卷 / 01期
关键词：
D O I：
10.1016/0013-4686(90)85033-J
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
A rotating ring-disc electrode has been used to study film growth on low alloy steels in carbonate-bicarbonate solution. Soluble Fe(II) ions have been detected during film growth initiated by potential steps to active, pre-passive and passive potential regions. Film growth in the pre-passive region has two distinct stages. Initial passivation during Stage 1 is followed by reactivation and extensive dissolution during Stage 2. Stage 2 film growth may be attributed to either the transformation of metastable passive film into a poorly protective film or the local break-down of the passive film at bainite laths or prior austenite grain boundaries. © 1990.
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页码：35 / 45
页数：11
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