Effect of equal-channel angular pressing and aging on corrosion behavior of ZK60 Mg alloy

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Xin LI
  • Jing-hua JIANG
  • Yong-hao ZHAO
  • Ai-bin MA
  • Dao-jing WEN

Detail(s)

Original languageEnglish
Pages (from-to)3909-3920
Journal / PublicationTransactions of Nonferrous Metals Society of China (English Edition)
Volume25
Issue number12
Publication statusPublished - Dec 2015
Externally publishedYes

Abstract

Commercial ZK60 Mg alloy was processed by multi-pass equal-channel angular pressing (ECAP) and subsequent aging to investigate the effect of grain refinement and second-phase redistribution on its corrosion behavior. Electrochemical tests show that the fine-grained samples after more ECAP passes have higher corrosion current densities (Jcorr) in the polarization curves, lower charge-transfer resistance (Rt) values in the EIS plots. The severe plastic deformation decreases the alloy corrosion resistance besides the well-known strengthening and toughening. Scanning Kelvin probe (SKP) measurement shows that the anodic and cathode sites are homogeneously distributed on the surface of the fine-grained alloy, which inhibits localized corrosion. The SKP potential, having linear relationship with the corrosion potential (φcorr), decreases with increasing the ECAP pass. Furthermore, the post-ECAP aging can slightly improve the corrosion resistance of the fine-grained ZK60 Mg alloy and enhance the comprehensive performances, due to the stress relief and uniform distribution of second-phase particles.

Research Area(s)

  • aging, corrosion resistance, equal-channel angular pressing, fine-grains, ZK60 Mg alloy

Citation Format(s)

Effect of equal-channel angular pressing and aging on corrosion behavior of ZK60 Mg alloy. / LI, Xin; JIANG, Jing-hua; ZHAO, Yong-hao; MA, Ai-bin; WEN, Dao-jing; ZHU, Yun-tian.

In: Transactions of Nonferrous Metals Society of China (English Edition), Vol. 25, No. 12, 12.2015, p. 3909-3920.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review