Novel conversion coatings for magnesium alloy AZ31 using ionic liquids

P. C. Howlett, S. K. Tan, S. Zhang, J. Efthimiadis, D. R. MacFarlane, M. Forsyth

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearchpeer-review

3 Citations (Scopus)


Ionic liquids (ILs) are generally defined as salts which have a melting point below 100 °C. The work presented here describes an investigation of the properties of the surface film formed when a reactive metal (e.g., magnesium alloy AZ31) is exposed to an IL. Treatment of AZ31 coupons with the IL, trihexyl(tetradecyl)phosphonium bis(trifluoromethanesulfonyl)amide (P 6,6,6,14TFSA), is effective in forming a passivation film which imparts improved corrosion resistance to the alloy. Corrosion data along with spectroscopic evidence detailing the nature of the passivation film formed on the AZ31 surface is presented. In addition, preliminary results from another IL, trihexyl(tetradecyl)phosphonium bis 2,4,4-trimethylpentylpentylphosphinate (P6,6,6,14M3PPh), which shows promise for corrosion mitigation are presented.

Original languageEnglish
Title of host publication46th Annual Conference of the Australasian Corrosion Association 2006
Subtitle of host publicationCorrosion and Prevention 2006
PublisherAustralasian Corrosion Association (ACA)
Number of pages6
ISBN (Print)9781622762422
Publication statusPublished - 1 Jan 2006
EventAustralasian Corrosion Association (ACA) Conference 2006: Corrosion and Prevention - Hobart, Australia
Duration: 19 Nov 200622 Nov 2006
Conference number: 46th


ConferenceAustralasian Corrosion Association (ACA) Conference 2006
Abbreviated titleCP 2006


  • Coating
  • Corrosion
  • Ionic liquids
  • Magnesium alloys
  • Phosphonium

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