STUDY ON THE PERFORMANCE OF ANODIZED COATING PREPARED ON 2024 ALUMINUM ALLOY VIA PULSE ANODIZING

Kongbao Lu, Liang Chen, Minxiang Pan, Hangfu Yang and Yundan Yu
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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

Surface Review and Letters (SRL), 2025, vol. 32, issue 02, 1-11

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.

Keywords: Anodizing; aluminum alloy; corrosion resistance (search for similar items in EconPapers)
Date: 2025
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DOI: 10.1142/S0218625X24501117

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