Influence of Anodic Oxidation on the Organizational Structure and Corrosion Resistance of Oxide Film on AZ31B Magnesium Alloy

Magnesium alloys, notably AZ31B, hold promise for lightweight structural applications in the aerospace, automotive, and biomedical sectors due to their excellent strength-to-weight ratios. The broad adoption of these alloys, however, is hindered by their inherent susceptibility to corrosion, reducin...

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Bibliographic Details
Published inCoatings (Basel) Vol. 14; no. 3; p. 271
Main Authors Kang, Yuxin, Yan, Shufang, Li, Zhanlin, Wang, Zhigang, Yang, Ao, Ma, Wen, Chen, Weidong, Qu, Yinhui
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.03.2024
Subjects
Anodizing
Corrosion and anti-corrosives
Corrosion potential
Corrosion resistance
Electric potential
Electrochemical analysis
Electrodes
Energy consumption
Ethylenediaminetetraacetic acid
Film thickness
Magnesium alloys
Magnesium base alloys
Morphology
Optimization
Organizational structure
Oxidation
Oxidation resistance
Oxide coatings
Phase composition
Process controls
Specialty metals industry
Strength to weight ratio
Surface treatment
Voltage
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Summary:Magnesium alloys, notably AZ31B, hold promise for lightweight structural applications in the aerospace, automotive, and biomedical sectors due to their excellent strength-to-weight ratios. The broad adoption of these alloys, however, is hindered by their inherent susceptibility to corrosion, reducing durability and functional integrity in corrosive environments. This study explores anodic oxidation as a viable surface treatment to improve the corrosion resistance of the AZ31B magnesium alloy. Focusing on the impact of oxidation voltage on the oxide film’s structural and electrochemical properties, we aim to optimize these characteristics to enhance the alloy’s utility and lifespan significantly. Through detailed analysis of surface and cross-sectional morphologies, film thickness, phase composition, and corrosion resistance, we identify an optimal oxidation voltage of 17.5 V that notably improves the oxide film’s density and corrosion resistance. Through this research, we contribute to the ongoing efforts to overcome the corrosion vulnerability of magnesium alloys, thereby unlocking their full potential in contributing to more sustainable and efficient technological advancements.
ISSN:2079-6412
2079-6412
DOI:10.3390/coatings14030271