The effects of a corrosion product film on the corrosion behavior of Mg-Al alloy with micro-alloying of yttrium in a chloride solution

Yao Yang; Sijun Cao; Tao Ying; Fuyong Cao; Jingya Wang; Qingchun Zhu; Xiaoqin Zeng

Corrosion Communications (Sep 2023)

The effects of a corrosion product film on the corrosion behavior of Mg-Al alloy with micro-alloying of yttrium in a chloride solution

Yao Yang,
Sijun Cao,
Tao Ying,
Fuyong Cao,
Jingya Wang,
Qingchun Zhu,
Xiaoqin Zeng

Affiliations

Yao Yang: National Engineering Research Center of Light Alloy Net Forming and State Key Laboratory of Metal Matrix Composite, Shanghai Jiao Tong University, Shanghai 200240, China
Sijun Cao: Aeronautical Radio Electronics Research Institute, Aviation Industry Corporation of China, Shanghai 200241, China
Tao Ying: National Engineering Research Center of Light Alloy Net Forming and State Key Laboratory of Metal Matrix Composite, Shanghai Jiao Tong University, Shanghai 200240, China
Fuyong Cao: Center for Marine Materials Corrosion and Protection, College of Materials, Xiamen University, Xiamen 361005, China
Jingya Wang: National Engineering Research Center of Light Alloy Net Forming and State Key Laboratory of Metal Matrix Composite, Shanghai Jiao Tong University, Shanghai 200240, China
Qingchun Zhu: National Engineering Research Center of Light Alloy Net Forming and State Key Laboratory of Metal Matrix Composite, Shanghai Jiao Tong University, Shanghai 200240, China
Xiaoqin Zeng: National Engineering Research Center of Light Alloy Net Forming and State Key Laboratory of Metal Matrix Composite, Shanghai Jiao Tong University, Shanghai 200240, China; Corresponding author.

Journal volume & issue: Vol. 11
pp. 12 – 22

Abstract

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Micro-alloying Mg alloys with rare earth elements is an economical and promising way to improve their corrosion resistance. It is of great importance to understand their corrosion behavior for designing corrosion-resistant Mg alloys. In this work, Mg-11Al-0.2Y alloy was prepared for exploring its corrosion behavior in 3.5 wt.% neutral NaCl solution. It exhibits a low corrosion current density of 2.3 µA/cm2 after immersion for 1 d due to the formation of a protective surface film containing Al2O3, MgO and Mg(OH)2. However, nano-scaled pores exhibit at the film/matrix interface, which undermines integrity and protectiveness of the surface film after long-term exposure to chloride solution.

Published in Corrosion Communications

ISSN: 2667-2669 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials
Website: https://www.journals.elsevier.com/corrosion-communications

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