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Open AccessArticle

Microstructure and Corrosion Resistance of PEO Coatings Formed on KBM10 Mg Alloy Pretreated with Nd(NO3)3

by Junpeng Lu 1,2, Xing He 1,2, Hongxia Li 3 and Renguo Song 1,2,*
1
Jiangsu Key Laboratory of Materials Surface Science and Technology, Changzhou University, Changzhou 213164, China
2
Jiangsu Collaborative Innovation Center of Photovolatic Science and Engineering, Changzhou University, Changzhou 213164, China
3
College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou 310018, China
*
Author to whom correspondence should be addressed.
Materials 2018, 11(7), 1062; https://doi.org/10.3390/ma11071062
Received: 6 June 2018 / Revised: 19 June 2018 / Accepted: 20 June 2018 / Published: 22 June 2018
(This article belongs to the Special Issue Metals Functionalization via Plasma Electrolytic Oxidation)
Plasma electrolytic oxidation (PEO) technique is one of the important methods used in the surface modification of magnesium alloys. In this paper, the ceramic coatings on pretreated KBM10 magnesium alloy with Nd(NO3)3 solution were prepared by PEO. The effects of Nd(NO3)3 solution concentration on the microstructure and corrosion resistance of PEO coatings on magnesium alloys were investigated by means of scanning electron microscopy (SEM), X-ray diffractometer (XRD), and electrochemical workstation. It was found that the surface of the coatings was porous after PEO, and element Nd could be deposited on the surface of the coatings by pretreatment and existed in the PEO coatings. The coating formed at Nd(NO3)3 solution concentration of 0.06 mol/L exhibited the best corrosion resistance among all the as-prepared coatings. View Full-Text
Keywords: plasma electrolytic oxidation; pretreatment; microstructure; corrosion resistance; magnesium alloy; Nd(NO3)3 solution plasma electrolytic oxidation; pretreatment; microstructure; corrosion resistance; magnesium alloy; Nd(NO3)3 solution
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Lu, J.; He, X.; Li, H.; Song, R. Microstructure and Corrosion Resistance of PEO Coatings Formed on KBM10 Mg Alloy Pretreated with Nd(NO3)3. Materials 2018, 11, 1062.

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