EFFECT OF HEXAMETHYLENETETRAMINE AS A CORROSION-INHIBITOR FOR COPPER IN BROMIDE MEDIUM

被引：19
作者：
BROLO, AG
TEMPERINI, MLA
AGOSTINHO, SML
机构：
[1] Instituto de Quimica, Universidade de São Paulo, 01498 São Paulo
来源：
JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 1992年 / 335卷 / 1-2期
基金：
巴西圣保罗研究基金会;
关键词：
D O I：
10.1016/0022-0728(92)80234-U
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
The electrochemical behaviour of copper in bromide medium in the absence and presence of hexamethylenetetramine (HMTA) was studied using a rotating disk electrode by several techniques. The results showed that HMTA is a corrosion inhibitor for copper in bromide medium containing Fe(III) ion or oxygen as oxidants. Corrosion potential measurements and anodic polarization curves indicated that for [HMTA] < 3.0 x 10(-3) M, the oxidation mechanism is reversible while the CuBrn1-n species are still soluble and it is not affected by the presence of HMTA; for [HMTA] > 3.0 x 10(-3) M, there is an inhibitive action and the anodic process is not diffusion controlled. The passive film was characterized by fluorescence spectroscopy as being a Cu(I)-HMTA-Br- complex.
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页码：83 / 92
页数：10
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