Corrosion behaviour of a magnesium matrix composite with a silicate plasma electrolytic oxidation coating

被引：93

作者：

Arrabal, R. ^{[1
]}

Pardo, A. ^{[1
]}

Merino, M. C. ^{[1
]}

Mohedano, M. ^{[1
]}

Casajus, P. ^{[1
]}

Matykina, E. ^{[2
]}

Skeldon, P. ^{[3
]}

Thompson, G. E. ^{[3
]}

机构：

[1] Univ Complutense, Fac Ciencias Quim, Dept Ciencia Mat, E-28040 Madrid, Spain

[2] Ctr Nacl Invest Met CENIM CS1C, Dept Corros & Protecc, Madrid 28040, Spain

[3] Univ Manchester, Sch Mat, Ctr Corros & Protect, Manchester M13 9PL, Lancs, England

来源：

CORROSION SCIENCE | 2010年 / 52卷 / 11期

基金：

英国工程与自然科学研究理事会;

关键词：

Magnesium; Metal matrix composites; Oxide coatings; Anodic films; Pitting corrosion; MICROARC OXIDATION; PEO COATINGS; ALLOYS; MG; MICROSTRUCTURE; SURFACE; AL; RESISTANCE;

D O I：

10.1016/j.corsci.2010.07.024

中图分类号：

T [工业技术];

学科分类号：

120111 [工业工程];

摘要：

The corrosion behaviour of AZ92 magnesium alloy reinforced with various volume fractions of silicon carbide particles (SiCp) and treated by alternating current (AC) plasma electrolytic oxidation (PEO) was investigated in humid and saline environments. For untreated composites, corrosion attack started around the Al-Mn inclusions and gradually developed into general corrosion without significant galvanic coupling between the matrix and the SiCp. PEO coatings consisted mainly of MgO and Mg(2)SiO(4), and revealed increased hardness, reduced thickness and slightly higher corrosion resistance with increasing proportion of reinforcement. Pit formation and hydration of the outer layer were the main mechanisms of corrosion of PEO-treated specimens. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：3738 / 3749

页数：12

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