Corrosion behaviour of polypyrrole-coated WE43 Mg alloy in a modified simulated body fluid solution

被引：51

作者：

Ascencio, M. ^{[1
]}

Pekguleryuz, M. ^{[2
]}

Omanovic, S. ^{[1
]}

机构：

[1] McGill Univ, Dept Chem Engn, 3610 Univ St, Montreal, PQ H3A 0C5, Canada

[2] McGill Univ, Dept Min & Mat Engn, Montreal, PQ H3A 0C5, Canada

来源：

CORROSION SCIENCE | 2018年 / 133卷

基金：

加拿大自然科学与工程研究理事会;

关键词：

Magnesium; Alloy; EIS; SEM; Polymer coatings; Oxidation; IN-VITRO DEGRADATION; RARE-EARTH ALLOY; MAGNESIUM ALLOY; CONDUCTING POLYMERS; PURE MAGNESIUM; ELECTROCHEMICAL POLYMERIZATION; CONVERSION COATINGS; COMPOSITE COATINGS; CORONARY-ARTERIES; OXIDIZABLE METALS;

D O I：

10.1016/j.corsci.2018.01.044

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The corrosion behaviour of PPy-coated WE43 Mg alloy in a simulated body fluid solution with daily electrolyte renewal is investigated by electrochemical, hydrogen evolution and analytical techniques. It is shown that the PPy coating effectively contributes to a decrease in the corrosion rate of WE43 Mg alloy and production of H-2 gas. An increase in the PPy coating protective properties observed after every electrolyte renewal is attributed to: 1) a decrease in the coating conductivity by the adsorption of CO2 species, and 2) substrate/coating decoupling due to uncompensated coating positive charging and misalignment of the substrate and coating Fermi levels.

引用

页码：261 / 275

页数：15

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