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Volume 24 Issue 5
May  2017
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文章导航 >  矿物冶金与材料学报（英文）  > 2017  >  24(5): 566-573
M. Siva Prasad, M. Ashfaq, N. Kishore Babu, A. Sreekanth, K. Sivaprasad, and V. Muthupandi, Improving the corrosion properties of magnesium AZ31 alloy GTA weld metal using microarc oxidation process, Int. J. Miner. Metall. Mater., 24(2017), No. 5, pp. 566-573. https://doi.org/10.1007/s12613-017-1438-x
Cite this article as:
M. Siva Prasad, M. Ashfaq, N. Kishore Babu, A. Sreekanth, K. Sivaprasad, and V. Muthupandi, Improving the corrosion properties of magnesium AZ31 alloy GTA weld metal using microarc oxidation process, Int. J. Miner. Metall. Mater., 24(2017), No. 5, pp. 566-573. https://doi.org/10.1007/s12613-017-1438-x
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研究论文

Improving the corrosion properties of magnesium AZ31 alloy GTA weld metal using microarc oxidation process

  • Department of Advanced Materials Engineering, Dong-Eui University, 995 Eomgwangno, Busanjin-gu, Busan 614-714, South Korea

  • Advanced Materials Processing Laboratory, Department of Metallurgical and Materials Engineering, National Institute of Technology, Tiruchirapalli 620015, India

  • FARCAMT, Advanced Manufacturing Institute, King Saud University, Riyadh, Saudi Arabia

  • Empa, Swiss Federal Laboratories for Materials Science and Technology, Laboratory for Advanced Materials Processing, Feuerwerkerstrasse 39, CH-3602 Thun, Switzerland

  • 通讯作者:

    M. Siva Prasad    E-mail: msiva048@gmail.com

  • In this work, the morphology, phase composition, and corrosion properties of microarc oxidized (MAO) gas tungsten arc (GTA) weldments of AZ31 alloy were investigated. Autogenous gas tungsten arc welds were made as full penetration bead-on-plate welding under the alternating-current mode. A uniform oxide layer was developed on the surface of the specimens with MAO treatment in silicate-based alkaline electrolytes for different oxidation times. The corrosion behavior of the samples was evaluated by potentiodynamic polarization and electrochemical impedance spectroscopy. The oxide film improved the corrosion resistance substantially compared to the uncoated specimens. The sample coated for 10 min exhibited better corrosion properties. The corrosion resistance of the coatings was concluded to strongly depend on the morphology, whereas the phase composition and thickness were concluded to only slightly affect the corrosion resistance.
    • Research Article

    Improving the corrosion properties of magnesium AZ31 alloy GTA weld metal using microarc oxidation process

    + Author Affiliations
      Abstract
    • In this work, the morphology, phase composition, and corrosion properties of microarc oxidized (MAO) gas tungsten arc (GTA) weldments of AZ31 alloy were investigated. Autogenous gas tungsten arc welds were made as full penetration bead-on-plate welding under the alternating-current mode. A uniform oxide layer was developed on the surface of the specimens with MAO treatment in silicate-based alkaline electrolytes for different oxidation times. The corrosion behavior of the samples was evaluated by potentiodynamic polarization and electrochemical impedance spectroscopy. The oxide film improved the corrosion resistance substantially compared to the uncoated specimens. The sample coated for 10 min exhibited better corrosion properties. The corrosion resistance of the coatings was concluded to strongly depend on the morphology, whereas the phase composition and thickness were concluded to only slightly affect the corrosion resistance.
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