Preparation and corrosion resistance of micro-arc oxidation ceramic coating on magnesium alloy

Liang Liang Li; Zhong Ping Yao; Xin Rong Liu; Xiao Lei Zhang; Zhao Hua Jiang

Preparation and corrosion resistance of micro-arc oxidation ceramic coating on magnesium alloy

Liang Liang Li^*
, Zhong Ping Yao
, Xin Rong Liu
, Xiao Lei Zhang
, Zhao Hua Jiang

^*Corresponding author for this work

School of Chemistry and Chemical Engineering

School of Chemistry and Chemical Engineering, Harbin Institute of Technology

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

1 Scopus citations

Abstract

Ceramic coatings containing Ca and P were formed on AZ91D alloy substrate by micro-arc oxidation technique. The surface morphology, phase composition and element content were investigated by SEM, XRD and EDS, respectively. The corrosion resistance was evaluated by Tafel and EIS. The results show that the coating is mainly composed of Mg₂SiO₄ and MgO, and Ca and P elements are successfully doped into the ceramic coating. Increasing the concentration of Ca²⁺ in the electrolyte, the Ca content increases, meantime the number of micro-pores increases and the micro-cracks appear on the coating surface. The ceramic coating improves the magnesium alloy's corrosion resistance in 0.9% NaCl solution by 1 ∼ 2 orders of magnitude according to the corrosion current density. The coating formed in electrolyte containing 0.3g/L Ca(H₂PO₂)₂ exhibits the best corrosion resistance property.

Original language	English
Pages (from-to)	19-21
Number of pages	3
Journal	Jinshu Rechuli/Heat Treatment of Metals
Volume	34
Issue number	8
State	Published - Aug 2009

Keywords

Ceramic coating
Corrosion resistance
Magnesium alloy
Micro-arc oxidation

Cite this

@article{86c1457c4f5a41928c3c57ffbe3dd1ec,

title = "Preparation and corrosion resistance of micro-arc oxidation ceramic coating on magnesium alloy",

abstract = "Ceramic coatings containing Ca and P were formed on AZ91D alloy substrate by micro-arc oxidation technique. The surface morphology, phase composition and element content were investigated by SEM, XRD and EDS, respectively. The corrosion resistance was evaluated by Tafel and EIS. The results show that the coating is mainly composed of Mg2SiO4 and MgO, and Ca and P elements are successfully doped into the ceramic coating. Increasing the concentration of Ca2+ in the electrolyte, the Ca content increases, meantime the number of micro-pores increases and the micro-cracks appear on the coating surface. The ceramic coating improves the magnesium alloy's corrosion resistance in 0.9\% NaCl solution by 1 ∼ 2 orders of magnitude according to the corrosion current density. The coating formed in electrolyte containing 0.3g/L Ca(H2PO2)2 exhibits the best corrosion resistance property.",

keywords = "Ceramic coating, Corrosion resistance, Magnesium alloy, Micro-arc oxidation",

author = "Li, \{Liang Liang\} and Yao, \{Zhong Ping\} and Liu, \{Xin Rong\} and Zhang, \{Xiao Lei\} and Jiang, \{Zhao Hua\}",

year = "2009",

month = aug,

language = "英语",

volume = "34",

pages = "19--21",

journal = "Jinshu Rechuli/Heat Treatment of Metals",

issn = "0254-6051",

publisher = "Chinese Heat Treatment Society",

number = "8",

}

TY - JOUR

T1 - Preparation and corrosion resistance of micro-arc oxidation ceramic coating on magnesium alloy

AU - Li, Liang Liang

AU - Yao, Zhong Ping

AU - Liu, Xin Rong

AU - Zhang, Xiao Lei

AU - Jiang, Zhao Hua

PY - 2009/8

Y1 - 2009/8

N2 - Ceramic coatings containing Ca and P were formed on AZ91D alloy substrate by micro-arc oxidation technique. The surface morphology, phase composition and element content were investigated by SEM, XRD and EDS, respectively. The corrosion resistance was evaluated by Tafel and EIS. The results show that the coating is mainly composed of Mg2SiO4 and MgO, and Ca and P elements are successfully doped into the ceramic coating. Increasing the concentration of Ca2+ in the electrolyte, the Ca content increases, meantime the number of micro-pores increases and the micro-cracks appear on the coating surface. The ceramic coating improves the magnesium alloy's corrosion resistance in 0.9% NaCl solution by 1 ∼ 2 orders of magnitude according to the corrosion current density. The coating formed in electrolyte containing 0.3g/L Ca(H2PO2)2 exhibits the best corrosion resistance property.

AB - Ceramic coatings containing Ca and P were formed on AZ91D alloy substrate by micro-arc oxidation technique. The surface morphology, phase composition and element content were investigated by SEM, XRD and EDS, respectively. The corrosion resistance was evaluated by Tafel and EIS. The results show that the coating is mainly composed of Mg2SiO4 and MgO, and Ca and P elements are successfully doped into the ceramic coating. Increasing the concentration of Ca2+ in the electrolyte, the Ca content increases, meantime the number of micro-pores increases and the micro-cracks appear on the coating surface. The ceramic coating improves the magnesium alloy's corrosion resistance in 0.9% NaCl solution by 1 ∼ 2 orders of magnitude according to the corrosion current density. The coating formed in electrolyte containing 0.3g/L Ca(H2PO2)2 exhibits the best corrosion resistance property.

KW - Ceramic coating

KW - Corrosion resistance

KW - Magnesium alloy

KW - Micro-arc oxidation

UR - https://www.scopus.com/pages/publications/70349248371

M3 - 文章

AN - SCOPUS:70349248371

SN - 0254-6051

VL - 34

SP - 19

EP - 21

JO - Jinshu Rechuli/Heat Treatment of Metals

JF - Jinshu Rechuli/Heat Treatment of Metals

IS - 8

ER -

Preparation and corrosion resistance of micro-arc oxidation ceramic coating on magnesium alloy

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