Polypyrrole-functionalized boron nitride nanosheets for high-performance anti-corrosion composite coating

Fushen Lu*, Chenqi Liu, Zihua Chen, Udayakumar Veerabagu, Zhaobin Chen, Mingen Liu, Liangsheng Hu, Hong Xia, Limei Cha, Wenjing Zhang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Boron nitride nanosheet (BNNS) is non-covalently functionalized with polypyrrole (PPy) and incorporated into epoxy for anti-corrosion coating, in which the functionalized BNNS (f-BNNS) exhibits excellent compatibility and dispersibility in the matrix. The f-BNNS0.5-PPy3/EP coating achieved a corrosion rate of 15 nm/year and a high impedance of 1.9 × 107 Ω cm2 after immersion in 3.5 wt% NaCl solution for 40 days, which are 58 times lower and two orders of magnitude larger than those of pure epoxy, respectively. The remarkably improved anti-corrosion activities of f-BNNS0.5-PPy3/EP coating may be mainly ascribed to the homogenous dispersion of insulative and hydrophobic BNNS in the matrix and the synergetic effect of polypyrrole.

Original languageEnglish
Article number127273
JournalSurface and Coatings Technology
Volume420
DOIs
StatePublished - 25 Aug 2021

Keywords

  • Anti-corrosion
  • Boron nitride nanosheet
  • Composite coating
  • Epoxy
  • Polypyrrole
  • Steel

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