Microstructural evolution and corrosion behavior of constituent particles of AA2024-T3 Al alloy during zirconium conversion coating

Guan-Ting Shen,Siao-Ying Chen,Chao-Yu Huang,Chao-Sung Lin

Applied Surface Science（2023）

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摘要

•Constituent particles of AA2024-T3 Al undergo different corrosion during pretreatment.•Constituent particle/Al galvanic coupling prevails during Zr conversion coating.•Alkaline degreasing and acidic desmutting promote Zr conversion reaction rate.•Zr conversion coating reduces the anodic kinetics in chloride solutions.

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关键词

Aluminum alloy, Constituent particle, Pretreatment, Zr conversion coating, Corrosion resistance, Microstructure

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