An electrochemical impedance study of ionic liquid film formation and aqueous corrosion of magnesium alloy ZE41
Data(s) |
01/12/2008
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Resumo |
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 (P<sub>66614</sub>DPP). 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.<br /> |
Identificador | |
Idioma(s) |
eng |
Publicador |
Wiley |
Relação |
http://dro.deakin.edu.au/eserv/DU:30040675/Howlett-electrochemical-2010.pdf http://dx.doi.org/10.1560/IJC.48.3-4.313 |
Direitos |
2010, Wiley |
Tipo |
Journal Article |