Corrosion properties of metals in dicyanamide-based ionic liquids

Yi Chen Wang, Tai Chou Lee, Jheng Yi Lin, Jeng-Kuei Chang*, Chuan Ming Tseng

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

33 Scopus citations

Abstract

Corrosion behavior of metals in 1-ethyl-3-methylimidazolium-dicyanamide, butylmethylpyrrolidinium-dicyanamide, and 1-ethyl-3-methylimidazolium chloride-chloroaluminate ionic liquids (ILs) is studied. The constituent anions, rather than the cations, are the predominant species that govern the IL corrosivity toward materials. Among the materials investigated, Ni shows the lowest corrosion current and the best resistance against anodic dissolution in the three ILs. In the dicyanamide-based ILs, 304 stainless steel, Ti, and Al also exhibit satisfactory anti-corrosion characteristics. However, the use of Cu, carbon steel, and Mg in the same environment should be avoided due to their poor corrosion resistance, especially under anodic polarization conditions.

Original languageEnglish
Pages (from-to)81-88
Number of pages8
JournalCorrosion Science
Volume78
DOIs
StatePublished - 1 Jan 2014

Keywords

  • A. Molten salts
  • B. Polarization
  • B. Potentiostatic
  • B. SEM
  • C. Passivity

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