ELECTROCHEMICAL STUDIES WITH COPPER-BASED ALLOYS - OPEN-CIRCUIT POTENTIAL OSCILLATIONS IN ALKALINE MEDIA

被引：13
|
作者：
HURTADO, MRF [1 ]
SUMODJO, PTA [1 ]
BENEDETTI, AV [1 ]
机构：
[1] UNIV SAO PAULO,INST QUIM,BR-01498 SAO PAULO,BRAZIL
来源：
JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 1993年 / 140卷 / 06期
关键词：
D O I：
10.1149/1.2221603
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
In open-circuit potential measurements of certain Cu-based alloys in NaOH solutions oscillations were observed in Cu-Al and Cu-Ag-Al. Studies with various electrolyte concentrations and rotation speeds of the electrode led to a possible explanation of the phenomenon in terms of Al dissolution altering the main Cu dissolution/passivation process. The accumulation of aluminate ions on the interphase and its transportation to the bulk solution are the main causes of the oscillations.
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收藏
页码：1567 / 1571
页数：5
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