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http://dx.doi.org/10.5695/JKISE.2017.50.4.266

Density and Corrosion Property Improvement of Zn-Mg Coatings by Controlling the Substrate Temperature during the Deposition  

Song, Myeon-Kyu (Center for Surface Technology and Applications, Department of Materials Engineering, Korea Aerospace University)
La, Joung-Hyun (Center for Surface Technology and Applications, Department of Materials Engineering, Korea Aerospace University)
Kim, Hoe-Kun (Center for Surface Technology and Applications, Department of Materials Engineering, Korea Aerospace University)
Lee, Sang-Yul (Center for Surface Technology and Applications, Department of Materials Engineering, Korea Aerospace University)
Publication Information
Journal of the Korean institute of surface engineering / v.50, no.4, 2017 , pp. 266-271 More about this Journal
Abstract
In this study, the corrosion resistance of Zn-3wt.%Mg coating was enhanced by controlling the density of coating. During the deposition the substrate temperature was controlled via an intermittent deposition process, resulting in the improvement of coating density. The maximum substrate temperature during this intermittent deposition process could be controlled from $200^{\circ}C$ to $80^{\circ}C$, depending upon the number of coating layer. The density of Zn-3 wt.%Mg coating increased from 76.1 % to 95.8 % as the substrate temperature was controlled. The salt spray test results revealed that the corrosion resistance of Zn-Mg coated steel could increase 3 times by increasing the density in coatings, while adhesion strength of coating was not changed significantly during 0-T bending test.
Keywords
Zn-Mg coating; Deposition temperature; Density; Corrosion resistance;
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