Corrosion resistance of oxide layers formed on AZ91 Mg alloy in KMnO4 electrolyte by plasma electrolytic oxidation

被引：122

作者：

Hwang, Duck Young ^{[1
]}

Kim, Yong Min ^{[1
]}

Park, Deok-Yong ^{[2
]}

Yoo, Bongyoung ^{[1
]}

Shin, Dong Hyuk ^{[1
]}

机构：

[1] Hanyang Univ, Dept Mat Engn, Ansan 426791, South Korea

[2] Hanbat Natl Univ, Dept Appl Mat Engn, Taejon 305719, South Korea

来源：

ELECTROCHIMICA ACTA | 2009年 / 54卷 / 23期

关键词：

Magnesium alloy; Plasma electrolytic oxidation; Corrosion; Potassium permanganate; Anodizing; MAGNESIUM ALLOY; AL ALLOYS; COATINGS; SILICATE; ANODIZATION; WE43;

D O I：

10.1016/j.electacta.2009.04.047

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The plasma electrolytic oxidation (PEO) process in AZ91 Mg alloy is studied using a solution containing KOH + KF + Na2SiO3 both with and without potassium permanganate (KMnO4). The addition of potassium permanganate to the electrolyte influences coating thickness, surface morphology and the microstructure of oxide layers obtained by the PEO process. Oxide layers formed on AZ91 Mg alloy by the electrolyte containing KMnO4 consists of MgO, MgF2, Mg2SiO4 and Mn2O3. The corrosion resistance of the sample processed in bath containing KMnO4 was superior to that of the sample processed in the bath without KMnO4. It is suggested that enhancement of the corrosion resistance of AZ91 Mg alloy depends strongly on the presence of manganese oxide in the oxide layer. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：5479 / 5485

页数：7

共 28 条

[1] The role of the magnesium industry in protecting the environment [J].

Aghion, E ;

Bronfin, B ;

Eliezer, D .

JOURNAL OF MATERIALS PROCESSING TECHNOLOGY, 2001, 117 (03) :381-385

[2] 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

[3] Corrosion resistance of WE43 and AZ91D magnesium alloys with phosphate PEO coatings [J].

Arrabal, R. ;

Matykina, E. ;

Viejo, F. ;

Skeldon, P. ;

Thompson, G. E. .

CORROSION SCIENCE, 2008, 50 (06) :1744-1752

[4] Characterization of oxide films formed on Mg-based WE43 alloy using AC/DC anodization in silicate solutions [J].

Birss, V ;

Xia, S ;

Yue, R ;

Rateick, RG .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2004, 151 (01) :B1-B10

[5]

CAI Q, 2004, SURF COAT TECH, V200, P3727

[6] Conversion-coating treatment for magnesium alloys by a permanganate-phosphate solution [J].

Chong, KZ ;

Shih, TS .

MATERIALS CHEMISTRY AND PHYSICS, 2003, 80 (01) :191-200

[7] Growth process of plasma electrolytic oxidation films formed on magnesium alloy AZ91D in silicate solution [J].

Duan, Hongping ;

Yan, Chuanwei ;

Wang, Fuhui .

ELECTROCHIMICA ACTA, 2007, 52 (15) :5002-5009

[8] Electrolytic plasma technology: Science and engineering - An overview [J].

Gupta, P. ;

Tenhundfeld, G. ;

Daigle, E. O. ;

Ryabkov, D. .

SURFACE & COATINGS TECHNOLOGY, 2007, 201 (21) :8746-8760

[9] Synthesis and characterization of hard metal coatings by electro-plasma technology [J].

Gupta, P ;

Tenhundfeld, G ;

Daigle, EO ;

Schilling, PJ .

SURFACE & COATINGS TECHNOLOGY, 2005, 200 (5-6) :1587-1594

[10] Anodization of AZ91D magnesium alloy in silicate-containing electrolytes [J].

Hsiao, HY ;

Tsung, HC ;

Tsai, WT .

SURFACE & COATINGS TECHNOLOGY, 2005, 199 (2-3) :127-134

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