천연 및 인공해수를 이용하여 제작한 환경친화적인 전착코팅막의 형성 특성
Formation Characteristics of Environment Friendly Electrodeposit Films Formed in Natural and Synthetic Seawater Conditions
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Abstract
The environment friendly calcareous deposit films were formed on steel plates by electrodeposition technique in natural seawater and synthetic solutions such as dissolved Mg2+ and Ca2+ ions at various potential conditions. The influence of potential conditions on composition ratio, structure and morphology of the electrodeposited films were investigated by scanning electron microscopy(SEM), energy dispersive spectroscopy(EDS) and X-ray diffractor (XRD).Accordingly, this study was provided a better understanding of the composition between the growth of Mg(OH)2 and that of CaCO3 during the formation of calcareous deposit films on steel substrate under cathodically electrodeposition in synthetic and natural seawater. The results showed that the formation of good overall calcareous deposited film in seawater can be achieved by controlling the Ca/Mg ratio according to interfacial pH with the effective use of the electro deposition technique.
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