Electrodissolution of cobalt in carbonate/bicarbonate media

被引：18
作者：
Calderón, JA
Mattos, OR
Barcia, OE
de Torresi, SIC
da Silva, JEP
机构：
[1] UFRJ, COPPE, PEMM, Lab Corrosao Prof Manoel de Castro, BR-21945970 Rio De Janeiro, Brazil
[2] Univ Antioquia, Grp Corros & Protecc, Medellin, Colombia
[3] UFRJ, IQ, Dept FisicoQuim, Rio De Janeiro, Brazil
[4] Univ Sao Paulo, Inst Quim, Dept Quim Fundamental, Sao Paulo, Brazil
来源：
ELECTROCHIMICA ACTA | 2002年 / 47卷 / 28期
基金：
巴西圣保罗研究基金会;
关键词：
cobalt; dissolution; carbonate/bicarbonate; Raman spectroscopy;
D O I：
10.1016/S0013-4686(02)00542-X
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
The electrodissolution of cobalt in carbonate/bicarbonate solutions was studied at room temperature by steady state polarisation, interfacial pH measurements and Raman spectroscopy. The active dissolution of cobalt leads to an initial CoO film formation. The CO32- metal passivation occurs by a slow transformation of the CoO into a Co3O4 oxide. The influence of HCO3- and CO32- anions was investigated. Two different parallel electrochemical processes were proposed to account for the anion role on the electrochemical steady state behaviour of cobalt in the studied solutions. (C) 2002 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码：4531 / 4541
页数：11
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