Proceedings of the Korean Institute of Surface Engineering Conference (한국표면공학회:학술대회논문집)
- 2015.11a
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- Pages.268-268
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- 2015
Corrosion protection behavior of AZ31 magnesium alloy with cathodic electrophoretic coating pretreated by cerium based conversion coatings at various pH
- Fazal, Basit Raza (Surface Technology Division, Korea Institute of Materials Science) ;
- Phuong, Nguyen Van (Surface Technology Division, Korea Institute of Materials Science) ;
- Moon, Sungmo (Surface Technology Division, Korea Institute of Materials Science)
- Published : 2015.11.26
Abstract
The corrosion protection behavior of AZ31 magnesium alloy (Mg alloy) with cathodic electrophoretic coating (E-coating) pretreated by cerium-based conversion coatings at various pH was investigated in this study. Cerium-based conversion coatings (CeCCs) were deposited on AZ31 Mg alloy by immersion treatment in the nitrate-based cerium salt solution. The morphology and composition of the CeCCs were analyzed using scanning electron microscopy and energy dispersive X-ray spectroscopy. The corrosion properties of the AZ31 Mg alloy pretreated with cerium coating and subsequently E-coated were studied during salt-spray testing. The surface morphologies of the E-coated Mg alloy were examined in detail after different testing times using digital photography. It was found that the protective properties of the E-coating on AZ31 Mg alloy generated are heavily dependent upon the CeCC factors such as treatment time, coating thickness and pH of the solution.
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