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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