Enhanced corrosion resistance of AZ31 Mg alloy by one-step formation of PEO/Mg-Al LDH composite coating

被引：0
|
作者：
Xinxin Zhang [1 ,2 ]
Yupeng Zhang [1 ,2 ]
You Lv [1 ,2 ]
Zehua Dong [1 ]
Teruo Hashimoto [3 ]
Xiaorong Zhou [3 ]
机构：
[1] Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure,School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology
[2] Hubei Engineering Research Centre for Biomaterials and Medical Protective Materials, Huazhong University of Science and Technology
[3] Corrosion and Protection Centre, Department of Materials, The University of
来源：
Corrosion Communication | 2022年 / 6卷 / 02期
关键词：
D O I：
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中图分类号：
TG174.4 [金属表面防护技术];
学科分类号：
摘要：
In the present work, a novel one-step plasma electrolytic oxidation(PEO) method is developed for the formation of PEO/Mg-Al layered double hydroxide(LDH) composite coating on AZ31 Mg alloy. Through the control of electrolyte concentration, a Mg-Al LDH layer was formed on the surface of the resultant PEO coating. The corrosion properties of the composite coating were evaluated by electrochemical analysis, hydrogen evolution measurement and salt spraying testing, which exhibited improved corrosion resistance due to the presence of the Mg-Al LDH layer. This work provides a new strategy to take advantage of alloying elements in Mg alloys in PEO treatment to enhance corrosion resistance.
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页码：67 / 83
页数：17
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