유/무기 하이브리드 용액에 의한 아연도금강판의 내식특성 (SiO2 폴리실리케이트와 멜라민의 양이 일정한 경우)

Abstract

This study evaluated the corrosion resistance for three kinds of zinc plated steel sheets. A high corrosion resistant coating solution had different amounts of urethane resin. The corrosion resistance of GI and GA steels were worse as the amount of urethane resin increased. However, EGI steel showed similar corrosion resistance regardless of the amount of urethane resin. The abrasion resistance, scratch resistance and flexural resistance were excellent in four kinds of coating solutions coated on three kinds of zinc plated steel sheets. It is considered that the excellent corrosion resistance of the coating liquid is due to the crosslinking of the melamine hardener to the SiO2 polysilicate and the urethane resin.