Phosphate ions used as green inhibitor against copper corrosion in tap water

被引：55

作者：

Valcarce, M. B. ^{[1
]}

Vazquez, M. ^{[1
]}

机构：

[1] UNMdP, Fac Ingn, INTEMA, Div Corros, Mar Del Plata, Buenos Aires, Argentina

来源：

CORROSION SCIENCE | 2010年 / 52卷 / 04期

关键词：

Copper; Cyclic voltammetry; Pitting corrosion; Passivity; Neutral inhibition; DISTRIBUTION-SYSTEMS; CARBON-STEEL; OXIDE-FILMS; BEHAVIOR; CHLORIDE; DISSOLUTION; PASSIVITY; SURFACE; BRASS;

D O I：

10.1016/j.corsci.2009.12.015

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Three dosages of PO43- ions are evaluated as corrosion inhibitors of copper in artificial tap water by measuring the corrosion potential, polarization resistance, electrochemical impedance and reflectance spectra. The water is moderately hard, highly carbonated and chloride-rich. The results show that the surface film is composed by Cu2O. When the inhibiting agent is added, the film becomes thicker, denser and more compact. This behaviour is attributed to CuO incorporating into the passive layer. The optimal dosage of inhibitor is 10 mg l(-1) P when the polarization resistance increases three times. The inhibitor retards the pit initiation, without hindering pit growth. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：1413 / 1420

页数：8