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Effect of Na2WO4 on Growth Process and Corrosion Resistance of Micro-arc Oxidation Coatings on 2A12 Aluminum Alloys in CH3COONa Electrolyte

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Abstract

Ceramic coatings were deposited on 2A12 aluminum alloys using micro-arc oxidation (MAO) technology in CH3COONa-Na2WO4 electrolyte. The MAO process was studied by recording the current-time curve. The influences of Na2WO4 concentrations on the coatings in CH3COONa electrolyte were investigated. The results show that the Na2WO4 concentrations affect the MAO process and performances of the coatings directly. Na2WO4 in excess is harmful for the formation of Al2O3 in this electrolyte. The corrosion resistance was enhanced with the decrease of Na2WO4 concentration.

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Acknowledgment

This work is part of a research program financed by the Development Project of Science and Technology of Shandong Province (Project No. 2010GSF10627) and Science and Technology Supporting System Item of Resource-conserving Society of Shandong Province (Project No. 2007JY05).

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Authors and Affiliations

  1. Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, School of Materials Science and Engineering, Shandong University, Jing Shi Road # 17923, Jinan, 250061, Shandong, People’s Republic of China

    Zhaoqing Lin, Siyu He, Diangang Wang & Chuanzhong Chen

  2. Key Laboratory of High-Efficiency and Clean Mechanical Manufacture (Shandong University), Ministry of Education, School of Mechanical Engineering, Shandong University, Ji’nan, 250061, Shandong, People’s Republic of China

    Huijun Yu

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  1. Zhaoqing Lin
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  2. Huijun Yu
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  3. Siyu He
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Correspondence to Huijun Yu or Chuanzhong Chen.

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Lin, Z., Yu, H., He, S. et al. Effect of Na2WO4 on Growth Process and Corrosion Resistance of Micro-arc Oxidation Coatings on 2A12 Aluminum Alloys in CH3COONa Electrolyte. J. of Materi Eng and Perform 25, 297–303 (2016). https://doi.org/10.1007/s11665-015-1803-8

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  • DOI: https://doi.org/10.1007/s11665-015-1803-8

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