Research ArticleNo Access

School of Mechanical and Automotive Engineering, Zhejiang University of Water Resources and Electric Power, Hangzhou 310018, P. R. China

Corresponding author.

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LIANG CHEN

https://orcid.org/0009-0002-4417-1672

Research and Development Department, Dongyang Dingfeng Magnetics Co. Ltd., Dongyang City, Zhejiang 322100, P. R. China

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MINXIANG PAN

https://orcid.org/0000-0001-5605-9093

College of Materials and Chemistry, China Jiliang University, Hangzhou, Zhejiang 310018, P. R. China

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HANGFU YANG

https://orcid.org/0000-0002-1433-017X

College of Materials and Chemistry, China Jiliang University, Hangzhou, Zhejiang 310018, P. R. China

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, and

YUNDAN YU

https://orcid.org/0000-0002-4914-3120

College of Materials and Chemistry, China Jiliang University, Hangzhou, Zhejiang 310018, P. R. China

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https://doi.org/10.1142/S0218625X24501117Cited by:0 (Source: Crossref)

Abstract

Different anodized coatings are prepared on the surface of 2024 aluminum alloy from different solutions by pulse anodizing to improve corrosion resistance and hardness. The thickness, roughness, structure, hardness, surface morphology, and corrosion resistance of different anodized coatings are studied. It is found that the anodized coating is composed of a porous layer on the surface and a nonporous barrier layer inside, showing the structure of $γ$ $γ$ -Al₂O₃ and $α$ $α$ -Al₂O₃. The anodized coating prepared from sulfuric acid solution mixed with oxalic acid and glycerol has a larger thickness and higher hardness. The surface morphology of the anodized coatings is porous. The thickness of the anodized coating prepared from oxalic acid solution is small and the pore distribution is not uniform. However, the anodized coating obtained from sulfuric acid solution mixed with oxalic acid and glycerol has the smallest average pore size of 6.38nm and ordered pore distribution, resulting in the best corrosion resistance.

Keywords:

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