유/무기 하이브리드 용액에 의한 자동차용 냉연 강판 SPCC와 SPFC590의 내식특성

Abstract

The cold-rolled steel sheet for automobile is liable to corrosion, and will be painting in a variety of ways for the anticorrosive. This paper was coated on cold rolled steel (SPCC and SPFC590) for automobiles using five kinds of organic/inorganic hybrid solution. This was evaluated corrosion resistance and so on by the salt spray. Corrosion area was less according to increasing of curing time in 2 types of steel plate with 5 types of the coating solution. The coating solution with SiO2 polysilicate 7 wt.% and melamine 3 wt.% was showed superior corrosion resistance at 3 minutes of hardening time. It was good for two kinds of the steel sheet. It is judged that the melamin hardner had the role of bridge between SiO2 polysilicate and urethan resin. Other properties were excellent in all solution.