Anodic coating of Mg-Nd-Gd-Zn-Zr (ev31a) and Mg-Y-Nd-Gd-Zr (WE43C) in saline solution

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Published: Jun 27, 2019
Keywords:
Magnesium rare earth alloy Anodic coating Chloride

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J. Ninlachart
Department of Marine Engineering, Education Branch, Royal Thai Naval Academy, 204 Sukumwit Rd. Pak Num, Muang Samut Prakan, Samut Prakan, 10270
K.S. Raja
Department of Chemical and Materials Engineering, University of Idaho, Moscow, Idaho, 83844, USA

Abstract

Mg-Nd-Gd-Zn-Zr (EV31A) and Mg-Y-Nd-Gd-Zr (WE43C) are heat-treatable magnesium (Mg) alloys which are used in aerospace and high-performance applications. Their strength to weight ratios are higher than aluminum alloys. In addition, their corrosion resistance was improved. Anodization in NaF is a typical method to protect surface of Mg alloys from corrosion.  EV31A and WE43C in as-received and peak-aged conditions were anodized in NaF and investigated. The studies were conducted in 0.1 M NaOH solution with 500 ppm of chloride concentration. Anodized EV31A in as-received condition showed similar pitting protection potential to the non-anodized one. In contrast, peak-aged EV31A which was not anodized presented better pitting protection potential compared to anodized peak-aged EV31A. Pitting protection potentials of both as-received and peak-aged conditions of WE43C were improved when the materials were anodized.

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How to Cite
Ninlachart, J., & Raja, K. (2019). Anodic coating of Mg-Nd-Gd-Zn-Zr (ev31a) and Mg-Y-Nd-Gd-Zr (WE43C) in saline solution. Journal of Research and Applications in Mechanical Engineering, 7(1), 83–90. Retrieved from https://ph01.tci-thaijo.org/index.php/jrame/article/view/183186
Issue
Vol. 7 No. 1 (2019)
Section
RESEARCH ARTICLES

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