CORROSION INHIBITION OF COBALT WITH A THIN-FILM OF CU-BTA

被引:22
作者
BRUSIC, V [1 ]
FRANKEL, GS [1 ]
SCHROTT, AG [1 ]
PETERSEN, TA [1 ]
RUSH, BM [1 ]
机构
[1] UNIV CALIF BERKELEY,DEPT CHEM ENGN,BERKELEY,CA 94720
关键词
D O I
10.1149/1.2220852
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
Electrochemical techniques, ellipsometry and x-ray photoelectron spectroscopy were used to evaluate the use of benzotriazole, alone or in combination with boric acid/borate buffer and dilute copper sulfate for the protection of cobalt. The data indicate that in slightly alkaline solutions benzotriazole is a strong inhibitor for cobalt corrosion, whereas in water and neutral solutions it produces a barely measurable effect. In the presence of benzotriazole and Cu+2 ions, spontaneous reduction of copper ions leads to the formation of a thin film of Cu-BTA on the cobalt surf ace. This film acts as a corrosion protector that is better than benzotriazole, with a significant reduction of the corrosion rate even during subsequent exposure to solutions without inhibitors.
引用
收藏
页码:2507 / 2511
页数:5
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