Influences of current density on the properties of micro-arc oxidation coatings on AZ91D Mg alloy

Yanhua Wang; Jia Wang; Jibiao Zhang

Influences of current density on the properties of micro-arc oxidation coatings on AZ91D Mg alloy

Yanhua Wang^*, Jia Wang, Jibiao Zhang

^*Corresponding author for this work

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

4 Citations (Scopus)

Abstract

By using optical microscopy, X - ray diffraction (XRD) and electrochemical impedance spectroscopy (EIS) technique, the structure, composition characteristics and the electrochemical properties of micro - arc oxidation (MAO) coatings prepared at different current density on AZ91D magnesium alloy were studied. It was found that with increasing the current density, the growth rate of the coating and its crystallization became higher, while the roughness and porosity of the coatings increased, and the film resistance R_f decreased. The properties of the coating were not determined by the total thickness, but the structure of the coating.

Original language	English
Pages (from-to)	332-335
Number of pages	4
Journal	Journal of the Chinese Society of Corrosion and Protection
Volume	25
Issue number	6
Publication status	Published - Dec 2005
Externally published	Yes

Keywords

Current density
Electrochemical impedance
Magnesium alloy
Micro-arc oxidation

Cite this

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abstract = "By using optical microscopy, X - ray diffraction (XRD) and electrochemical impedance spectroscopy (EIS) technique, the structure, composition characteristics and the electrochemical properties of micro - arc oxidation (MAO) coatings prepared at different current density on AZ91D magnesium alloy were studied. It was found that with increasing the current density, the growth rate of the coating and its crystallization became higher, while the roughness and porosity of the coatings increased, and the film resistance Rf decreased. The properties of the coating were not determined by the total thickness, but the structure of the coating.",

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author = "Yanhua Wang and Jia Wang and Jibiao Zhang",

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T1 - Influences of current density on the properties of micro-arc oxidation coatings on AZ91D Mg alloy

AU - Wang, Yanhua

AU - Wang, Jia

AU - Zhang, Jibiao

PY - 2005/12

Y1 - 2005/12

N2 - By using optical microscopy, X - ray diffraction (XRD) and electrochemical impedance spectroscopy (EIS) technique, the structure, composition characteristics and the electrochemical properties of micro - arc oxidation (MAO) coatings prepared at different current density on AZ91D magnesium alloy were studied. It was found that with increasing the current density, the growth rate of the coating and its crystallization became higher, while the roughness and porosity of the coatings increased, and the film resistance Rf decreased. The properties of the coating were not determined by the total thickness, but the structure of the coating.

AB - By using optical microscopy, X - ray diffraction (XRD) and electrochemical impedance spectroscopy (EIS) technique, the structure, composition characteristics and the electrochemical properties of micro - arc oxidation (MAO) coatings prepared at different current density on AZ91D magnesium alloy were studied. It was found that with increasing the current density, the growth rate of the coating and its crystallization became higher, while the roughness and porosity of the coatings increased, and the film resistance Rf decreased. The properties of the coating were not determined by the total thickness, but the structure of the coating.

KW - Current density

KW - Electrochemical impedance

KW - Magnesium alloy

KW - Micro-arc oxidation

UR - http://www.scopus.com/inward/record.url?scp=30344453048&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:30344453048

SN - 1005-4537

VL - 25

SP - 332

EP - 335

JO - Journal of the Chinese Society of Corrosion and Protection

JF - Journal of the Chinese Society of Corrosion and Protection

IS - 6

ER -

Influences of current density on the properties of micro-arc oxidation coatings on AZ91D Mg alloy

Abstract

Keywords

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