TY - JOUR
T1 - An electrochemical impedance study of ionic liquid film formation and aqueous corrosion of magnesium alloy ZE41
AU - Howlett, Patrick C.
AU - Neil, Wayne
AU - Khoo, Timothy
AU - Sun, Jiazeng
AU - Forsyth, Maria
AU - MacFarlane, Douglas R.
PY - 2008/12/1
Y1 - 2008/12/1
N2 - Ionic liquid surface treatments are proposed as a method of controlling corrosion processes on magnesium alloys. An important magnesium alloy, ZE41 (nominally 4% Zn and 1% rare earth), was treated with the ionic liquid trihexyl(tetradecyl)phosphonium diphenylphosphate (P66614DPP). Impedance spectra were acquired at intervals during the treatment, indicating the development of a film and allowing a measure of the film formation process to be obtained over time. Mechanically polished and electro-polished surfaces were prepared; these surfaces, treated and untreated, were subsequently exposed to 0.1 M NaCl aqueous solutions. The corrosion behavior of the prepared surfaces were assessed using impedance spectroscopy and optical microscopy. The results indicated a significant role for the method of surface preparation used and, in both cases, the ionic liquid treatment produced a more corrosion-resistant surface.
AB - Ionic liquid surface treatments are proposed as a method of controlling corrosion processes on magnesium alloys. An important magnesium alloy, ZE41 (nominally 4% Zn and 1% rare earth), was treated with the ionic liquid trihexyl(tetradecyl)phosphonium diphenylphosphate (P66614DPP). Impedance spectra were acquired at intervals during the treatment, indicating the development of a film and allowing a measure of the film formation process to be obtained over time. Mechanically polished and electro-polished surfaces were prepared; these surfaces, treated and untreated, were subsequently exposed to 0.1 M NaCl aqueous solutions. The corrosion behavior of the prepared surfaces were assessed using impedance spectroscopy and optical microscopy. The results indicated a significant role for the method of surface preparation used and, in both cases, the ionic liquid treatment produced a more corrosion-resistant surface.
UR - http://www.scopus.com/inward/record.url?scp=59449106626&partnerID=8YFLogxK
U2 - 10.1560/IJC.48.3-4.313
DO - 10.1560/IJC.48.3-4.313
M3 - Article
AN - SCOPUS:59449106626
SN - 0021-2148
VL - 48
SP - 313
EP - 318
JO - Israel Journal of Chemistry
JF - Israel Journal of Chemistry
IS - 3-4
ER -