Microarc oxidation of corrosion resistant ceramic coating on a magnesium alloy

被引：85

作者：

Guo, HF ^{[1
]}

An, MZ ^{[1
]}

Xu, S ^{[1
]}

Huo, HB ^{[1
]}

机构：

[1] Harbin Inst Technol, Dept Appl Chem, Harbin 150001, Peoples R China

来源：

MATERIALS LETTERS | 2006年 / 60卷 / 12期

关键词：

magnesium alloy; microarc oxidation; ceramics; coatings; corrosion;

D O I：

10.1016/j.matlet.2005.11.066

中图分类号：

T [工业技术];

学科分类号：

08 [工学];

摘要：

A ceramic coating was fabricated on AZ31B magnesium alloy in alkaline silicate solution by microarc oxidation to improve its corrosion resistance. XRD analysis indicates that the ceramic coating is composed of spinel phase Mg2SiO4 and MgO. SEM images indicate that the coating is composed of two layers, a porous outer layer and a dense inner layer. A few circular pores of 1-3 mu m diameter are present in the porous outer layer, but they do not penetrate the dense inner layer. The corrosion resistance of magnesium alloys coated with ceramic coating was improved considerably as verified by potentiodynamic polarization curves and weight loss measurement in 3.5 wt.% NaCl solution. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：1538 / 1541

页数：4

共 16 条

[1]

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

[2]

Corrosion of AZ91D magnesium alloy with a chemical conversion coating and electroless nickel layer [J].

Huo, HW ;

Li, Y ;

Wang, FH .

CORROSION SCIENCE, 2004, 46 (06) :1467-1477

[3]

Anodizing of pure magnesium in KOH-aluminate solutions under sparking [J].

Khaselev, O ;

Weiss, D ;

Yahalom, J .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1999, 146 (05) :1757-1761

[4]

Corrosion behaviour of high pressure die-cast and semi-solid cast AZ91D alloys [J].

Mathieu, S ;

Rapin, C ;

Hazan, J ;

Steinmetz, P .

CORROSION SCIENCE, 2002, 44 (12) :2737-2756

[5]

Mato S, 2003, CORROS SCI, V45, P1779, DOI [10.1016/s0010-938X(02)00258-5, 10.1016/S0010-938X(03)00258-5]

[6]

Abrasive wear/corrosion properties and TEM analysis of Al2O3 coatings fabricated using plasma electrolysis [J].

Nie, X ;

Meletis, EI ;

Jiang, JC ;

Leyland, A ;

Yerokhin, AL ;

Matthews, A .

SURFACE & COATINGS TECHNOLOGY, 2002, 149 (2-3) :245-251

[7]

The corrosion protection afforded by rare earth conversion coatings applied to magnesium [J].

Rudd, AL ;

Breslin, CB ;

Mansfeld, F .

CORROSION SCIENCE, 2000, 42 (02) :275-288

[8]

SOGN GL, 2004, CORROS SCI, V46, P955

[9]

Song GL, 1999, ADV ENG MATER, V1, P11, DOI 10.1002/(SICI)1527-2648(199909)1:1<11::AID-ADEM11>3.0.CO

[10]

2-N

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