Effects of diamond-like carbon film on the corrosion behavior of NdFeB permanent magnet

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

8 Scopus Citations
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  • Shu Xiao
  • Donglai Chen
  • Kejian Ding
  • Guosong Wu


Original languageEnglish
Pages (from-to)66-74
Journal / PublicationSurface and Coatings Technology
Publication statusPublished - 25 Feb 2017


A diamond-like carbon (DLC) film is deposited on the NdFeB permanent magnet by plasma immersion ion implantation and deposition (PIII&D) and characterized by atomic force microscopy, scanning electron microscopy, Raman scattering, and mechanical tests. Electrochemical and immersion tests conducted for different time durations show that the corrosion resistance in 3.5% NaCl and 5 mM H2SO4 is improved by the DLC coating and corrosion tests also reveal enhanced corrosion resistance in both media. The corrosion mechanism of both the untreated and DLC-coated NdFeB is proposed and discussed.

Research Area(s)

  • Corrosion, Diamond-like carbon, EIS, Permanent magnet, Rare earth elements