Formation and Evolution of Corrosion Products on Eutectic Microstructures: A Novel Study to Understand Corrosion Protection of Zn–Al–Mg Coatings

IF 1.6 4区材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials and Corrosion-werkstoffe Und Korrosion Pub Date : 2024-11-14 DOI:10.1002/maco.202414474

Jiashun Zhou, Youbin Wang, Yongkun Li, Zhengbing Xu, Kezhun He, Zhaodong Wang

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引用次数: 0

Abstract

Zn–Al–Mg coatings contain Zn phase and Zn/Mg–Zn, Zn/Al, and Zn/Al/Mg–Zn eutectics. The formation and evolution of corrosion products on different eutectics that affect the corrosion resistance of Zn–Al–Mg coatings require further exploration. In this work, the formation and evolution of corrosion products on different microstructures were investigated. The results show that while the corrosion products on different microstructures are mainly Zn₅(OH)₈Cl₂, the phase composition and morphology of corrosion products vary significantly. These differences in corrosion products on each microstructure were discussed in detail. The corrosion protective properties of corrosion products on different microstructures were compared. The protective properties of corrosion products are closely related to the content and morphology of Zn₅(OH)₈Cl₂ and Zn₆Al₂(OH)₁₆CO₃. The corrosion products on Zn/Al/Mg₂Zn₁₁ eutectic are the finest and densest, with high content of Zn₅(OH)₈Cl₂ and Zn₆Al₂(OH)₁₆CO₃, showing good protective performance. Increasing the content of Zn/Al/Mg–Zn eutectic to enhance the corrosion resistance of Zn–Al–Mg coatings should be considered in the subsequent work.

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来源期刊

Materials and Corrosion-werkstoffe Und Korrosion 工程技术-材料科学：综合

CiteScore

3.70

自引率

11.10%

发文量

199

审稿时长

1.4 months

期刊介绍： Materials and Corrosion is the leading European journal in its field, providing rapid and comprehensive coverage of the subject and specifically highlighting the increasing importance of corrosion research and prevention. Several sections exclusive to Materials and Corrosion bring you closer to the current events in the field of corrosion research and add to the impact this journal can make on your work.