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High densification and anti-corrosion of graphene-coated aluminum coating deposited on AZ31B magnesium by low-pressure cold spray

  • Carbon Letters
  • Abbr : Carbon Lett.
  • 2020, 30(5), pp.581-584
  • DOI : 10.1007/s42823-020-00128-y
  • Publisher : Korean Carbon Society
  • Research Area : Natural Science > Natural Science General > Other Natural Sciences General
  • Received : September 16, 2019
  • Accepted : February 11, 2020
  • Published : October 1, 2020

Zhang Liuyan 1 Wang Xiujin 2 Wu Huishu 2 Mai Yongjin 2 Liu Cansen 2 Jie Xiaohua 2

1Guangdong University of Technology
2Guangdong University of Technology

Accredited

ABSTRACT

In this paper, graphene-coated Al powders prepared by in situ reduction method were directly used for cold spraying, obtain�ing a graphene-reinforced Al matrix composite coating with more compact structure and better performance. Cross-sectional analysis revealed that compared with the pure Al powders, the graphene-coated Al powders were more severely deformed, and the resulting coating was denser and its porosity was reduced by over 80%. The hardness of the graphene-coated Al coating was increased by 40%, and its brine immersion time was prolonged by nearly three times. However, the graphene increases the pitting sensitivity of the Al coating; so, the enhanced corrosion resistance of the graphene-coated Al coating is mainly attributed to the improvement of its structure densifcation.

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