Characterization of Mg,Al-hydrotalcite conversion film on Mg alloy and Cl- and CO32- anion-exchangeability of the film in a corrosive environment

被引：152

作者：

Lin, J. K. ^{[1
]}

Hsia, C. L. ^{[1
]}

Uan, J. Y. ^{[1
]}

机构：

[1] Natl Chung Hsing Univ, Dept Mat Engn, Taichung 402, Taiwan

来源：

SCRIPTA MATERIALIA | 2007年 / 56卷 / 11期

关键词：

magnesium alloys; corrosion; coating; minerals; anion-exchangeability;

D O I：

10.1016/j.scriptamat.2007.02.020

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

This work explores an environmentally clean method for synthesizing chemical conversion coatings on Mg alloy. An Mg,Al-hydrotalcite (Mg6Al2(OH)(16)CO3 center dot 4H(2)O) layer was initially developed on Mg alloy in an HCO3-/CO32- aqueous solution to protect the alloy from corrosion. The Mg,Al-hydrotalcite-coated Mg sample had a much greater corrosion resistance than an as-die-cast sample. In a corrosive environment (chloride solution), the hydrotalcite layer exhibited CO32- for Cl- anion-exchangeability, causing that the layer protected Mg alloy against corrosion. (C) 2007 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：927 / 930

页数：4

共 22 条

[1] Evaluation of microstructural effects on corrosion behaviour of AZ91D magnesium alloy [J].

Ambat, R ;

Aung, NN ;

Zhou, W .

CORROSION SCIENCE, 2000, 42 (08) :1433-1455

[2]

AVEDESIAN M M, 1999, AM SOC METALS SPECIA, P199

[3]

AVEDESIAN MM, 1999, ASM SPECIALTY HDB MA, P143

[4]

BOMMER H, 1998, MAGNESIUM ALLOYS THE, P79

[5] Active corrosion protection and corrosion sensing in chromate-free organic coatings [J].

Buchheit, RG ;

Guan, H ;

Mahajanam, S ;

Wong, F .

PROGRESS IN ORGANIC COATINGS, 2003, 47 (3-4) :174-182

[6] BASIC PROPERTIES OF MG1-X(2+)ALX(3+) LAYERED DOUBLE HYDROXIDES INTERCALATED BY CARBONATE, HYDROXIDE CHLORIDE AND SULFATE ANIONS [J].

CONSTANTINO, VRL ;

PINNAVAIA, TJ .

INORGANIC CHEMISTRY, 1995, 34 (04) :883-892

[7]

GHALI E, 2004, J MAT ENG PERFORM, V13

[8] A NON-CHROMATE CONVERSION COATING FOR MAGNESIUM ALLOYS AND MAGNESIUM-BASED METAL-MATRIX COMPOSITES [J].

GONZALEZNUNEZ, MA ;

NUNEZLOPEZ, CA ;

SKELDON, P ;

THOMPSON, GE ;

KARIMZADEH, H ;

LYON, P ;

WILKS, TE .

CORROSION SCIENCE, 1995, 37 (11) :1763-1772

[9] Protective coatings on magnesium and its alloys - a critical review [J].

Gray, JE ;

Luan, B .

JOURNAL OF ALLOYS AND COMPOUNDS, 2002, 336 (1-2) :88-113

[10] On the application of computer simulation techniques to anionic and cationic clays: A materials chemistry perspective [J].

Greenwell, HC ;

Jones, W ;

Coveney, PV ;

Stackhouse, S .

JOURNAL OF MATERIALS CHEMISTRY, 2006, 16 (08) :708-723

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