INHIBITION OF CORROSION OF α-BRASS (Cu-Zn, 67/33) IN HNO3 SOLUTIONS BY SOME ARYLAZO INDOLE DERIVATIVES.

被引：0

作者：

Fouda, A. S. ^{[1
]}

Mahfouz, H. ^{[1
]}

机构：

[1] El Mansoura Univ, Fac Sci, Dept Chem, Mansoura 35516, Egypt

来源：

JOURNAL OF THE CHILEAN CHEMICAL SOCIETY | 2009年 / 54卷 / 03期

关键词：

corrosion inhibition; alpha-brass; synergistic effect; HNO3; arylazo indole derivatives; COPPER CORROSION; ANIONS; STEEL; BEHAVIOR; CHLORIDE;

D O I：

暂无

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The influence of some arylazo indole derivatives on the corrosion rate of 70/30 alpha-brass in 2 mol l(-1) HNO3, was investigated using weight loss and galvanostatic polarization techniques. It was found that the investigated compounds behave as inhibitors. The inhibition efficiency increases with increasing the inhibitor concentration, but decreases with increasing the temperature. The adsorption of these compounds on the alpha-brass surface follows a Frumkin's adsorption isotherm. The electrochemical results indicated that all the investigated compounds act as mixed-type inhibitors. The influence of the substituent group on the inhibition efficiency of the inhibitor was explained in terms of the density of the electron cloud on arylazo indole moiety. Some thermodynamic parameters for corrosion and adsorption processes were determined and discussed.

引用

页码：302 / 308

页数：7

共 29 条

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