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http://dx.doi.org/10.5695/JKISE.2018.51.4.224

Improvement of Corrosion Resistance by Mg Films Deposited on Hot Dip Aluminized Steel using a Sputtering Method  

Park, ae-Hyeok (Division of Marine Engineering, Korea Maritime and Ocean University)
Kim, Soon-Ho (Division of Marine Engineering, Korea Maritime and Ocean University)
Jeong, Jae-In (Materials Solution Research Group, Research Institute of Industrial Science & Technology)
Yang, Ji-Hoon (Materials Solution Research Group, Research Institute of Industrial Science & Technology)
Lee, Kyung-Hwang (Materials Solution Research Group, Research Institute of Industrial Science & Technology)
Lee, Myeong-Hoon (Division of Marine Engineering, Korea Maritime and Ocean University)
Publication Information
Journal of the Korean institute of surface engineering / v.51, no.4, 2018 , pp. 224-230 More about this Journal
Abstract
In this study, Mg films were prepared on hot dip aluminized steel (HDA) by using a sputtering method as a high corrosion resistance coating. The corrosion resistance of the Mg films was improved by controlling the morphology and the crystal structure of films by adjusting the Ar gas pressure during the coating process. Anodic polarization measurement results confirm that the corrosion resistance of the Mg films was affected by surface morphology and crystal structure. The corrosion resistance of the Mg coated HDA specimen increased with decreasing crystal size of the Mg coating and it was also improved by forming a film with denser morphology. The crystal structure oriented at Mg(101) plane showed the best corrosion resistance among crystal planes of the Mg metals, which is attributed to its relatively low surface energy. Neutral salt spray test confirmed that corrosion resistance of HDA can be greatly improved by Mg coating, which is superior to that of HDG (hot dip galvanized steel). The reason for the improvement of the corrosion resistance of Mg films on hot dip aluminized steel was due to the barrier effect by the Mg corrosion products formed by the corrosion of the Mg coating layer.
Keywords
Mg film; physical vapor deposition; hot dip aluminized steel; corrosion resistance;
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Times Cited By KSCI : 1  (Citation Analysis)
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