An investigation of the corrosion mechanisms of WE43 Mg alloy in a modified simulated body fluid solution: The influence of immersion time

被引：209

作者：

Ascencio, M. ^{[1
]}

Pekguleryuz, M. ^{[2
]}

Omanovic, S. ^{[1
]}

机构：

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

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

来源：

CORROSION SCIENCE | 2014年 / 87卷

基金：

加拿大自然科学与工程研究理事会;

关键词：

Alloy; Magnesium; EIS; SEM; Oxidation; Interfaces; CONSTANT-PHASE-ELEMENT; ELECTROCHEMICAL IMPEDANCE SPECTROSCOPY; PORCINE CORONARY-ARTERIES; SODIUM-SULFATE SOLUTIONS; AZ91 MAGNESIUM ALLOY; RARE-EARTH ALLOY; HIGH-PURITY MG; PURE MAGNESIUM; IN-VITRO; LOCALIZED CORROSION;

D O I：

10.1016/j.corsci.2014.07.015

中图分类号：

T [工业技术];

学科分类号：

120111 [工业工程];

摘要：

The corrosion mechanisms and kinetics of WE43 Mg alloy in a modified simulated body fluid (m-SBF) are investigated by electrochemical, hydrogen evolution and analytical techniques. The changes in the impedance response over time are related to four corrosion stages involving the formation of a partially protective corrosion layer and adsorption of Mg intermediates, formation of an inner passive MgO layer with increasing coverage over time, rupture of the corrosion layer and lateral growth of stable pits. ATR-FTIR, XRD and XPS results show the presence of an amorphous carbonated apatite/Mg(OH)(2) mixed corrosion layer. (c) 2014 Elsevier Ltd. All rights reserved.

引用

页码：489 / 503

页数：15

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