Effects of coverage layer on the electrochemical corrosion behaviour of Mg-Al-Mn alloy subjected to massive laser shock peening treatment

K. Y. Luo, C. Y. Wang, C. Y. Cui, J. Z. Lu, Y. F. Lu

Research output: Contribution to journalArticle

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Abstract

Effects of coverage layer on electrochemical corrosion behaviour and pitting morphologies of Mg-Al-Mn alloy subjected to massive laser shock peening (LSP) treatment were investigated by potentiodynamic polarisation test, electrochemical impedance spectroscopy (EIS), and scanning electron microscope (SEM) observations. Microstructures of Mg-Al-Mn alloy subjected to massive LSP treatment were also characterized. Results showed that LSP induced an obvious improvement in electrochemical corrosion resistance with increasing coverage layer. Even in a higher corrosive solution concentration, LSP could still prevent corrosion to some extent. The improvement in electrochemical corrosion resistance was due to the grain refinement and compressive residual stress induced by massive LSP treatment. Finally, the influence mechanism of the coverage layer on electrochemical corrosion behaviour of Mg-Al-Mn alloy was revealed.

Original languageEnglish (US)
Pages (from-to)1058-1075
Number of pages18
JournalJournal of Alloys and Compounds
Volume782
DOIs
StatePublished - Apr 25 2019

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Keywords

  • Coverage layer
  • Electrochemical corrosion
  • Laser shock peening
  • Mg-Al-Mn alloy
  • Microstructure

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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