Preparation of micro-arc oxidation coating on Mg-Li alloy and corrosion resistance property

Yong Jun Xu; Kang Li; Zhao Hua Jiang; Zhong Ping Yao; Mi Lin Zhang

Preparation of micro-arc oxidation coating on Mg-Li alloy and corrosion resistance property

Yong Jun Xu^*
, Kang Li
, Zhao Hua Jiang
, Zhong Ping Yao
, Mi Lin Zhang

^*Corresponding author for this work

School of Chemistry and Chemical Engineering

Harbin Institute of Technology
Harbin Engineering University

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

Abstract

Micro-arc oxidation (MAO) coatings were in-situ fabricated on the surface of Mg-5wt%Li alloy in a sodium silicate solution system by a home-made pulsed mono-polar electrical source. The morphology feature, phase composition and corrosion-resistance properties of ceramic coatings were studied by SEM, XRD, electrochemical method and salt water corrosion tests respectively. The results showed that the coatings are composed of MgO and MgSiO₃. The coated samples have much better pitting corrosion resistance than the Mg-Li substrate in terms of cyclic voltammetry curves. Samples the coated samples had severe corrosion in the salt water. The optimum current denstiy, frequency, adjusting ratio and reaction time were 2 A/dm², 300 Hz, 80% and 20 min respectively.

Original language	English
Pages (from-to)	133-136
Number of pages	4
Journal	Cailiao Kexue yu Gongyi/Material Science and Technology
Volume	18
Issue number	1
State	Published - Feb 2010

Keywords

Ceramic coating
Mg-Li alloy
Micro-arc oxidation
Pitting corrosion

Cite this

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title = "Preparation of micro-arc oxidation coating on Mg-Li alloy and corrosion resistance property",

abstract = "Micro-arc oxidation (MAO) coatings were in-situ fabricated on the surface of Mg-5wt\%Li alloy in a sodium silicate solution system by a home-made pulsed mono-polar electrical source. The morphology feature, phase composition and corrosion-resistance properties of ceramic coatings were studied by SEM, XRD, electrochemical method and salt water corrosion tests respectively. The results showed that the coatings are composed of MgO and MgSiO3. The coated samples have much better pitting corrosion resistance than the Mg-Li substrate in terms of cyclic voltammetry curves. Samples the coated samples had severe corrosion in the salt water. The optimum current denstiy, frequency, adjusting ratio and reaction time were 2 A/dm2, 300 Hz, 80\% and 20 min respectively.",

keywords = "Ceramic coating, Mg-Li alloy, Micro-arc oxidation, Pitting corrosion",

author = "Xu, \{Yong Jun\} and Kang Li and Jiang, \{Zhao Hua\} and Yao, \{Zhong Ping\} and Zhang, \{Mi Lin\}",

year = "2010",

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journal = "Cailiao Kexue yu Gongyi/Material Science and Technology",

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TY - JOUR

T1 - Preparation of micro-arc oxidation coating on Mg-Li alloy and corrosion resistance property

AU - Xu, Yong Jun

AU - Li, Kang

AU - Jiang, Zhao Hua

AU - Yao, Zhong Ping

AU - Zhang, Mi Lin

PY - 2010/2

Y1 - 2010/2

N2 - Micro-arc oxidation (MAO) coatings were in-situ fabricated on the surface of Mg-5wt%Li alloy in a sodium silicate solution system by a home-made pulsed mono-polar electrical source. The morphology feature, phase composition and corrosion-resistance properties of ceramic coatings were studied by SEM, XRD, electrochemical method and salt water corrosion tests respectively. The results showed that the coatings are composed of MgO and MgSiO3. The coated samples have much better pitting corrosion resistance than the Mg-Li substrate in terms of cyclic voltammetry curves. Samples the coated samples had severe corrosion in the salt water. The optimum current denstiy, frequency, adjusting ratio and reaction time were 2 A/dm2, 300 Hz, 80% and 20 min respectively.

AB - Micro-arc oxidation (MAO) coatings were in-situ fabricated on the surface of Mg-5wt%Li alloy in a sodium silicate solution system by a home-made pulsed mono-polar electrical source. The morphology feature, phase composition and corrosion-resistance properties of ceramic coatings were studied by SEM, XRD, electrochemical method and salt water corrosion tests respectively. The results showed that the coatings are composed of MgO and MgSiO3. The coated samples have much better pitting corrosion resistance than the Mg-Li substrate in terms of cyclic voltammetry curves. Samples the coated samples had severe corrosion in the salt water. The optimum current denstiy, frequency, adjusting ratio and reaction time were 2 A/dm2, 300 Hz, 80% and 20 min respectively.

KW - Ceramic coating

KW - Mg-Li alloy

KW - Micro-arc oxidation

KW - Pitting corrosion

UR - https://www.scopus.com/pages/publications/77952002855

M3 - 文章

AN - SCOPUS:77952002855

SN - 1005-0299

VL - 18

SP - 133

EP - 136

JO - Cailiao Kexue yu Gongyi/Material Science and Technology

JF - Cailiao Kexue yu Gongyi/Material Science and Technology

IS - 1

ER -

Preparation of micro-arc oxidation coating on Mg-Li alloy and corrosion resistance property

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