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Study On The Performance Of Anodized Coating Prepared On 2024 Aluminum Alloy Via Pulse Anodizing

Author

Listed:
  • KONGBAO LU

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

  • LIANG CHEN

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

  • MINXIANG PAN

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

  • HANGFU YANG

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

  • YUNDAN YU

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

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-Al2O3 and 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.

Suggested Citation

  • Kongbao Lu & Liang Chen & Minxiang Pan & Hangfu Yang & Yundan Yu, 2025. "Study On The Performance Of Anodized Coating Prepared On 2024 Aluminum Alloy Via Pulse Anodizing," Surface Review and Letters (SRL), World Scientific Publishing Co. Pte. Ltd., vol. 32(02), pages 1-11, February.
    • Handle: RePEc:wsi:srlxxx:v:32:y:2025:i:02:n:s0218625x24501117
    DOI: 10.1142/S0218625X24501117
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