Improving the corrosion resistance of MgZn1.2GdxZr0.18 (x =0, 0.8, 1.4, 2.0) alloys via Gd additions

Yin, Siqi, Duan, Wenchao, Liu, Wenhong, Wu, Liang, Bao, Jiaxin, Yu, Jiamin, Li, Liang, Zhao, Zhong, Cui, Jianzhong and Zhang, Zhiqiang (2020) Improving the corrosion resistance of MgZn1.2GdxZr0.18 (x =0, 0.8, 1.4, 2.0) alloys via Gd additions. Corrosion Science, 177: 108962. ISSN 0010-938X

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Effects of Gd addition on microstructure, corrosion behavior and mechanism of cast and extruded MgZn1.2GdxZr0.18 alloys are investigated through microstructure observation, weight loss and electrochemical tests. Increasing Gd from 0 to 2.0 at.%, grains are refined, MgZn2 phase, W-phase and X-phase are formed successively, and basal texture intensity is decreased. The significantly decreased grain size by extrusion and Gd addition induces formation of protective Gd2O3 and MgO layer. The extruded MgZn1.2Gd2.0Zr0.18 alloy shows decreased corrosion rate of 3.72 ± 0.36 mm/year, owing to fine and homogeneous microstructure, dual-role (micro-anode and barrier) of X-phase, compact oxidation layer and basal crystallographic texture.

Item Type	Article
Additional information	Funding Information: This research was financially supported by the National Key Research and Development Program of China (Grant No. 2016YFB0301101 ), the National Natural Science Foundation of China (Grant No. 51971054 ) and the Fundamental Research Funds for the Central Universities (Grant Nos. N180904006 and N2009006 ). Publisher Copyright: © 2020 Elsevier Ltd
Keywords	a. magnesium, a. rare earth elements, b. polarization, b. xps, c. intergranular corrosion, c. passive films, general chemistry, general chemical engineering, general materials science
Date Deposited	15 May 2025 14:24
Last Modified	24 Jun 2025 00:03