Copper corrosion inhibition by triphenylmethane derivatives in sulphuric acid media

被引：143

作者：

Bastidas, JM

Pinilla, P

Cano, E

Polo, JL

Miguel, S

机构：

[1] CSIC, Natl Ctr Met Res, CENIM, Madrid 28040, Spain

[2] Univ Politecn Madrid, Sch Naval Engn, Madrid 28040, Spain

[3] Univ Castilla La Mancha, Sch Ind Engn, Toledo 45071, Spain

来源：

CORROSION SCIENCE | 2003年 / 45卷 / 02期

关键词：

copper corrosion; fuchsin basic; fuchsin acid; benzotriazole; adsorption and kinetic model isotherms; projected molecular area;

D O I：

10.1016/S0010-938X(02)00123-3

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Triphenylmethane derivatives, namely fuchsin basic (FB) and fuchsin acid (FA), were studied for their possible use as copper corrosion inhibitors in 0.001 to 1.0 M sulphuric acid solutions. Benzotriazole (BTA) was also tested for comparative purposes. These inhibitors were studied in concentrations from 1 x 10(-5) to 1 x 10(-1) M at temperatures from 298 to 328 K. The gravimetric method was employed to study the protective effect of FB, FA and BTA. The order of inhibition efficiency was BTA > FB > FA. Up to nine adsorption isotherms were tested to fit the experimental data. The best fit was obtained using the Frumkin isotherm model. A thermodynamic/kinetic model of adsorption was also fitted. The projected molecular area of the inhibitors was calculated to elucidate inhibitor orientation in the adsorption process. (C) 2002 Elsevier Science Ltd. All rights reserved.

引用

页码：427 / 449

页数：23

共 40 条

[1]

Al-Mayouf AM, 2001, BRIT CORROS J, V36, P127

[2]

ATEYA BG, 1984, CORROS SCI, V24, P509, DOI 10.1016/0010-938X(84)90033-7

[3] Substitutional inhibition mechanism of mild steel hydrochloric acid corrosion by hexylamine and dodecylamine [J].