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http://dx.doi.org/10.5695/JKISE.2018.51.6.405

Adhesion and Corrosion Resistance of Electrophoretic Paint on "Electroless" Paint Coated AZ31 Mg Alloy  

Phuong, Nguyen Van (MSC Co., Ltd.)
Kim, Donghuyn (MSC Co., Ltd.)
Moon, Sungmo (Korea Institute of Materials Science)
Publication Information
Journal of the Korean institute of surface engineering / v.51, no.6, 2018 , pp. 405-414 More about this Journal
Abstract
The present study investigated the adhesion and corrosion resistance of subsequent electrophoretic paint (E-paint) on "electroless" paint coated AZ31 Mg alloy, which was formed by immersion of AZ31 Mg alloy in E-painting solution. It was found that with increasing immersion time of AZ31 in E-painting solution, the amount of paint deposited by electroless process increased but it decreased the electrochemical equivalent of E-painting process and the adhesion of the subsequent E-paint layer. The E-paint on electroless paint coated AZ31 contained pores with the highest pore density and the largest pore size was obtained on the samples with electroless times of 2 and 5 minutes, respectively. Results of the salt-spray test showed an accelerated growth of blisters over the entire surface of the sample immersed for less than 5 minutes whereas blisters were observed only in the vicinity of the scratch in case of samples treated for 15 and 30 minutes. The E-paint on AZ31 with shorter electroless immersion time in E-painting solution was found to have good adhesion and better corrosion resistance.
Keywords
Magnesium alloy; E-painting; Electroless; Corrosion; Adhesion;
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Times Cited By KSCI : 1  (Citation Analysis)
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