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http://dx.doi.org/10.7840/kics.2015.40.5.974

Electrochemical Characteristics in Sea Water of Al-3%Mg Arc Spray Coating Layer for Corrosion Protection with Sealing Treatment  

Park, Il-Cho (Division of Marine Engineering, Mokpo National Maritime University)
Kim, Seong-Jong (Division of Marine Engineering, Mokpo National Maritime University)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.40, no.5, 2015 , pp. 974-980 More about this Journal
Abstract
Arc thermal spray coating using Al-3%Mg thermal spray wire was carried out to prevent steel from corrosion damage under the marine environment. Post-sealing was applied to Al-3%Mg spray coating treatment using organic/inorganic composite ceramics in order to improve the corrosion resistance of the as-sprayed coating. The results of various electrochemical experiments with sealing treatment indicated that the improvement in corrosion resistance was observed due to low current density in all applied potential range during anodic and cathodic polarization experiments. Futhermore, the natural potential measurement exhibited severe potential fluctuation due to influence of micro-crack presence on the surface of sealed thermal spray coating layer. In addition, the sealed layer was easily eliminated during anodic polarization. Nevertheless, Al-3%Mg spray coating layer improved corrosion resistance by sealing treatment because the sealed coating efficiency was determined to be 92.11%, indicating the exterior environment barrier effect which is based on the Tafel analysis.
Keywords
Arc Thermal Spray coating; Al-3%Mg; Post-sealing; Corrosion;
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Times Cited By KSCI : 2  (Citation Analysis)
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