용사된 도막의 내식성에 관한 전기화학적 평가

다국어 초록 (Multilingual Abstract)

There are many surface protection methods for steel structures under severely corrosive environment, one of them, metallizing(thermal spray) is a available protection method which is comparatively and recently developed for surrface protection of various steel structures. However coating film obtained by spraying is to be needed increasingly more good corrosion resistance due to accelerating of environmental contamination. In this study, coating films(DFT:200㎛) are made with arc spray with wire metal both of pure zinc or aluminum and their alloy metals with some ratio(Al:Zn=85:15, 85:5). And corrosion resistance of their films is investigated with electrochemical methods in seawater solution. Pure aluminum film showed a somewhat good corrosion resistance among those of other films and good corrosion resistance was also observed at alloy films with some ratio compared to pure zinc film. Especially film of galvarium spray(Al:Zn=85:15) showed not good corrosion resistance than that of pure aluminum film in seawater solution. Morphology of corroded surface of pure zinc film appeared the pattern like intergranlar corrosion, however film of pure aluminum showed a general corrosion pattern.