Effect of Homogenization Treatment on the Corrosion Behavior and Mechanism of Mg-Y Alloys


The effect of homogenization treatment on the corrosion behavior and corrosion mechanism of Mg-Y alloys in 3.5 wt% NaCl solution was investigated by electrochemical characterization, immersion testing and SEM observations. The diffusion kinetics model of Mg-Y alloy was established, and the homogenization system was determined. With increasing of homogenization temperature and time, the Mg24Y5 phase gradually decreased, which increased the self-corrosion potential and the high-frequency arc radius. The corrosion resistance of the five alloys could be given as follow: Mg-0.25Y < Mg-8Y < Mg-15Y < Mg-5Y < Mg-2.5Y. The Mg- (0.25, 2.5 and 5) Y show localized corrosion in a wide range and small depth, while Mg- (8 and 15) Y showed localized corrosion in a smaller range and larger depth.

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Correspondence to Xin Zhang 张新.

Additional information

Funded by the National Key Technologies R & D Program of China (No. 2019YFC1511405), and the National Science and Technology Support Program of China (No. 2011BAE22B06)

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Zhang, X., Zhang, K. & Wu, Z. Effect of Homogenization Treatment on the Corrosion Behavior and Mechanism of Mg-Y Alloys. J. Wuhan Univ. Technol.-Mat. Sci. Edit. 35, 635–652 (2020). https://doi.org/10.1007/s11595-020-2301-x

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Key words

  • homogenization
  • Mg-Y alloy
  • corrosion
  • diffusion kinetics
  • tafel
  • corrosion rate