Painting system are widely used to prevent corrosion damage The coating method on various corrosion preventive method was usually adopted for the functional ability and excellent appearance. In this study, to evaluate the deterioration curve of coating system for steel bridge, the combined cyclic corrosion test was conducted base on ISO 20340. The deterioration areas were measured depending on corrosion cycle. The deteriorations of newly-built coating were compared with those of re-coating.

Abstract
 1. 서 론
 2. 시험편제작 및 부식실험방법
 3. 실험결과 및 고찰
 4. 결 론
 참고문헌

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