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Catalytic graphene-mediated oxygen blocking and depletion for enhancing dual passive/active anticorrosion of epoxy coatings

  • Carbon Letters
  • Abbr : Carbon Lett.
  • 2022, 32(7), pp.1757-1770
  • DOI : 10.1007/s42823-022-00384-0
  • Publisher : Korean Carbon Society
  • Research Area : Natural Science > Natural Science General > Other Natural Sciences General
  • Received : April 27, 2022
  • Accepted : July 24, 2022
  • Published : December 1, 2022

Yan Tong 1 Cheng Meng 2 Liu Junhao 2 Sun Shuangqing 3 Hu Songqing 3

1College of Science, China University of Petroleum (East China)
2School of Materials Science and Engineering, China University of Petroleum (East China)
3Institute of Advanced Materials, China University of Petroleum (East China)

Accredited

ABSTRACT

Doping graphene to epoxy resins can improve the protective ability of the coating, but the lack of active anticorrosion function greatly limits its application in the field of anticorrosion. Herein, N/S-rich few-layer-graphene (N/S-FLG) was prepared and adopted to endow epoxy coating with dual passive/active corrosion protection. The obtained amphiphilic N/S-FLG is highly dispersed in the epoxy coating, giving rise to the enhanced hosting effect for graphene defects, avoiding the interface corrosion and blocking the penetration of corrosive species. Furthermore, the doping of N and S endows graphene sheets favourable catalytic ability for corrosive oxygen, actively eliminating its contribution to metal corrosion. Under this dual effect, the passive and active anticorrosion properties of epoxy coating are simultaneously enhanced. The coating with 1 wt% N/S-FLG reduces the corrosion rate of metal to 6.5 × 10–5 mm/a, exhibiting almost no corrosion. The proposed concept of introducing nanocatalytic N/S-FLG is facile and eco-friendly, and will undoubtedly promote the practical application of anticorrosion coatings.

Citation status

* References for papers published after 2022 are currently being built.