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http://dx.doi.org/10.5762/KAIS.2012.13.10.4365

Effects of Nitrate Electrolyte as the MAO process for Ceramic Coating treatments of AZ31 alloy  

Cho, Young-Hee (Dept. of Advanced Material Eng., Kongju National University)
Jang, Kyong-Soo (Dept. of Advanced Material Eng., Kongju National University)
Park, Sei-He (Dept. of Advanced Material Eng., Kongju National University)
Lee, Ho-Jeong (Dept. of Advanced Material Eng., Kongju National University)
Lee, Tae-Haeng (Dept. of Advanced Material Eng., Kongju National University)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.13, no.10, 2012 , pp. 4365-4370 More about this Journal
Abstract
AZ31 Mg alloy were coated by Macro Arc Oxidation(MAO) with 3 types of electrolyte and various coating times at 4A/$cm^2$. The Surface morphology of coatings became lager pores and surface crack initiated as the coating time increased. The thickness and micro-hardness of coatings increased as the coating time increased. also. The phase of coatings on AZ31 alloy consisted of MgO, $Mg_2SiO_4$ and $MgAl_2O_4$ oxides. The salt spray corrosion resistance of coated AZ31 alloys revealed excellent corrosion resistance in 5% NaCl solution for 168hr.
Keywords
Micro Arc Oxidation; Magnesium Alloy; AZ31; Ceramic Coating; Electrolyte;
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