Anodic oxidation of AZ31 Mg alloy in ionic liquid

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

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 proceeding › Conference Paper › Research › peer-review

Abstract

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 language	English
Title of host publication	18th International Corrosion Congress 2011
Subtitle of host publication	20-24 November 2011; Perth, Australia
Place of Publication	Blackburn VIC Australia
Publisher	Australasian Corrosion Association
Pages	274-284
Number of pages	11
Volume	1
ISBN (Print)	9781618393630
Publication status	Published - 2011
Event	International Corrosion Congress 2011 - Perth Convention and Exhibition Centre, Perth, Australia Duration: 20 Nov 2011 → 24 Nov 2011 Conference number: 18th

Conference

Conference	International Corrosion Congress 2011
Abbreviated title	ICC 2011
Country	Australia
City	Perth
Period	20/11/11 → 24/11/11
Other	The 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.

Keywords

Anodising
AZ31
Corrosion protection
Ionic liquid
Magnesium
Oxidation

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Cite this

Latham, J-A., Howlett, P. C., MacFarlane, D. R., & Forsyth, M. (2011). Anodic oxidation of AZ31 Mg alloy in ionic liquid. In 18th International Corrosion Congress 2011: 20-24 November 2011; Perth, Australia (Vol. 1, pp. 274-284). Australasian Corrosion Association.

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title = "Anodic oxidation of AZ31 Mg alloy in ionic liquid",

abstract = "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.",

keywords = "Anodising, AZ31, Corrosion protection, Ionic liquid, Magnesium, Oxidation",

author = "J.-A. Latham and Howlett, {P. C.} and MacFarlane, {D. R.} and M. Forsyth",

year = "2011",

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Anodic oxidation of AZ31 Mg alloy in ionic liquid. / Latham, J.-A.; Howlett, P. C.; MacFarlane, D. R.; Forsyth, M.

18th International Corrosion Congress 2011: 20-24 November 2011; Perth, Australia. Vol. 1 Blackburn VIC Australia : Australasian Corrosion Association, 2011. p. 274-284.

Research output: Chapter in Book/Report/Conference proceeding › Conference Paper › Research › peer-review

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AU - Howlett, P. C.

AU - MacFarlane, D. R.

AU - Forsyth, M.

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N2 - 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.

AB - 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.

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KW - Corrosion protection

KW - Ionic liquid

KW - Magnesium

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