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Materials Science and Technology Volume 39, 2023 - Issue 18
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Research Article

Effects of Ga and In on the properties of Zn-Al sacrificial anodes

Junqi Shaoa Faculty of Materials Metallurgy and Chemistry, Jiangxi University of Science and Technology, Ganzhou, People’s Republic of China
,
Fei Yangb Mineral Application Institute of Guangdong Province, Shaoguan, People’s Republic of China
,
Jian Wangc Shaoguan Smelter, Shaoguan, People’s Republic of China
,
Shenghua Denga Faculty of Materials Metallurgy and Chemistry, Jiangxi University of Science and Technology, Ganzhou, People’s Republic of ChinaCorrespondence[email protected]
,
Yong Lianga Faculty of Materials Metallurgy and Chemistry, Jiangxi University of Science and Technology, Ganzhou, People’s Republic of China
,
Hongjin Zhaoa Faculty of Materials Metallurgy and Chemistry, Jiangxi University of Science and Technology, Ganzhou, People’s Republic of China
,
Tongsheng Denga Faculty of Materials Metallurgy and Chemistry, Jiangxi University of Science and Technology, Ganzhou, People’s Republic of China
&
Liang Xud Ganzhou Tengyuan Cobalt New Material Co., Ltd, Ganzhou, People’s Republic of China
 show all
Pages 3015-3024 | Received 04 Mar 2023, Accepted 26 Jun 2023, Published online: 06 Jul 2023
 
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Abstract

The influence of Ga and In on the microstructure and electrochemical performance of a Zn-Al alloy was investigated. It was found that the microstructure of the Zn-Al sacrificial anode can be significantly refined by Ga and In, but excess Ga or In leads to segregation. Electrochemical tests show that Zn-0.5Al-0.07 Ga and Zn-0.5Al-0.1In have the most negative OCPs, the corrosion products of which can easily flake off from the corroded surface, showing the good performance of cathodic protection. A small amount of Ga and In contribute to the corrosion of the Zn-Al alloy; however, excess Ga or In can improve the corrosion resistance of the alloy by refining the grains and making the surface of the oxide film form quickly.

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No potential conflict of interest was reported by the author(s).

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