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Effect of Microstructures on Corrosion Behavior of Nickel Coatings: (II) Competitive Effect of Grain Size and Twins Density on Corrosion Behavior

  • Guozhe Meng*
  • , Yang Li
  • , Yawei Shao
  • , Tao Zhang
  • , Yanqiu Wang
  • , Fuhui Wang
  • , Xuequn Cheng
  • , Chaofang Dong
  • , Xiaogang Li
  • *Corresponding author for this work
  • Harbin Engineering University
  • CAS - Institute of Metal Research
  • University of Science and Technology Beijing

Research output: Contribution to journalArticlepeer-review

Abstract

Nanocrystalline nickel coatings with grain size of 50 nm were annealed in vacuum at 200 °C and 400 °C for 10 min. Their microstructures were investigated by transmission electron microscopy (TEM). And their corrosion behaviors were studied by means of polarization and electrochemical impedance spectroscopy (EIS). The results showed that their grain size grew up to about 60 nm (200 °C) and 500 nm (400 °C), respectively. The specimen annealed at 200 °C possessed higher density of twins in compared with the counterparts of as-deposited and annealed at 400 °C. The normal grain size effect on the corrosion behavior was not observed. However, it was found that the corrosion resistance of the coating linearly changed with the density of twins.

Original languageEnglish
Pages (from-to)465-469
Number of pages5
JournalJournal of Materials Science and Technology
Volume32
Issue number5
DOIs
StatePublished - 1 May 2016
Externally publishedYes

Keywords

  • Annealing twins
  • Corrosion properties
  • Grain sizes
  • Nanocrystalline

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