Preparation and corrosion resistance of titanium-containing coating on AZ31B magnesium alloy

SHI Xiaoting; ZHU Yuanyuan; LI Guoqiang; ZHANG Shufang; ZHAO Rongfang; ZHANG Yijia; ZHANG Rongfa

doi:10.11868/j.issn.1005-5053.2018.001019

Journal of Aeronautical Materials (Jan 2019)

Preparation and corrosion resistance of titanium-containing coating on AZ31B magnesium alloy

SHI Xiaoting,
ZHU Yuanyuan,
LI Guoqiang,
ZHANG Shufang,
ZHAO Rongfang,
ZHANG Yijia,
ZHANG Rongfa

Affiliations

SHI Xiaoting: School of Materials and Electromechanics, Jiangxi Science and Technology Normal University, Nanchang 330013, China
ZHU Yuanyuan: School of Materials and Electromechanics, Jiangxi Science and Technology Normal University, Nanchang 330013, China
LI Guoqiang: School of Materials and Electromechanics, Jiangxi Science and Technology Normal University, Nanchang 330013, China
ZHANG Shufang: School of Materials and Electromechanics, Jiangxi Science and Technology Normal University, Nanchang 330013, China
ZHAO Rongfang: School of Materials and Electromechanics, Jiangxi Science and Technology Normal University, Nanchang 330013, China
ZHANG Yijia: School of Materials and Electromechanics, Jiangxi Science and Technology Normal University, Nanchang 330013, China
ZHANG Rongfa: School of Materials and Electromechanics, Jiangxi Science and Technology Normal University, Nanchang 330013, China

DOI: https://doi.org/10.11868/j.issn.1005-5053.2018.001019
Journal volume & issue: Vol. 39, no. 1
pp. 17 – 25

Abstract

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The titanium-containing oxide film has attracted attention due to the phenomenon of self-sealing pores. The influences of fluorotitanate (K2TiF6), phytic acid (H12Phy) and sodium fluoride(NaF) concentrations as well as final voltage on corrosion resistance of oxide film were investigated by an orthogonal experiment with four factors and three levels. The coating performances were characterized by using scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD) and electrochemical methods. The results show that the sequence of processing factors on the corrosion resistance of oxide film is H12Phy concentration > NaF concentration > final voltage > K2TiF6 concentration. Anodic coatings are mainly composed of TiO2, MgF2, Mg2PO4F and Mg2TiO4. Micro-arc oxidation (MAO) coating can significantly improve the corrosion resistance of magnesium alloy. However, with the prolonging of immersion time, the coating corrosion resistance decreases.

Published in Journal of Aeronautical Materials

ISSN: 1005-5053 (Print)
Publisher: Journal of Aeronautical Materials
Country of publisher: China
LCC subjects: Technology: Motor vehicles. Aeronautics. Astronautics
Website: http://jam.biam.ac.cn/indexen.htm

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