Anodic oxidation of AZ31 Mg alloy in ionic liquid

J.-A. Latham, P. C. Howlett, D. R. MacFarlane, M. Forsyth

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


This study investigates the film formation of the ionic liquid-Mg alloy system using trihexyl(tetradecyl)phosphonium bis 2, 4, 4- trimethylpentylphopshinate (P 6,6,6,14( iC 8) 2PO 2) ionic liquid with AZ31 magnesium alloy during oxidation. Oxidation was performed at relatively low voltages (<V vs. OCP of AZ31) using both constant-voltage and constant-current techniques. Anodic films were produced in conditions of varying applied voltage, current density, time and temperature. Films formed at a constant voltage of 3 V were highly porous, and inhomogeneous unless treated at an elevated temperature of 50°C. These films provided no improvement in corrosion resistance over the control. Comparatively, anodising AZ31 to a final voltage of 18 V at 0.01 mA/cm 2 in ionic liquid resulted in a reduction in microgalvanic corrosion at cathodic sites. The preliminary results suggest that the ionic liquid solution may be a possible candidate as an anodising electrolyte.

Original languageEnglish
Title of host publication18th International Corrosion Congress 2011
Subtitle of host publication20-24 November 2011; Perth, Australia
Place of PublicationBlackburn VIC Australia
PublisherAustralasian Corrosion Association (ACA)
Number of pages11
ISBN (Print)9781618393630
Publication statusPublished - 2011
EventInternational Corrosion Congress 2011 - Perth Convention and Exhibition Centre, Perth, Australia
Duration: 20 Nov 201124 Nov 2011
Conference number: 18th


ConferenceInternational Corrosion Congress 2011
Abbreviated titleICC 2011
OtherThe 18th International Corrosion Congress took place between the 20th and the 24th November 2011 in the Perth Convention and Exhibition Centre, Australia. The International Corrosion Congress is the major event of the International Corrosion Council (ICC), an international body founded to advance corrosion science and engineering and is held once every three years by different host countries.


  • Anodising
  • AZ31
  • Corrosion protection
  • Ionic liquid
  • Magnesium
  • Oxidation

Cite this