The Effect of Additive to Corrosion Resistance of Heavy Anti-Corrosive Paint

J. Ocean Eng. Technol. 2007;21(3):65-70.

Moon, Kyung-Man;Cho, Hwang-Rae;Lee, Myung-Hoon;Kim, Hyun-Myung;Lee, In-Won;Chun, Ho-Hwan;

Dept. of Mechanical and Material Engineering, Korea Maritime Univ.;Dept. of Mechanical and Material Engineering, Korea Maritime Univ.;Dept. of Marine System Engineering, Korea Maritime Univ.;Byucksanpaint & Coatings co, ltd.;Dept. of Naval Architecture an

중방식 도료의 내식성에 미치는 첨가제의 영향

문경만;조황래;이명훈;김현명;이인원;전호환;

한국해양대학교 기계소재공학부;한국해양대학교 기계소재공학부;한국해양대학교 기관시스템공학부;벽산페인트(주);부산대학교 조선해양공학과;부산대학교 조선해양공학과;

Keywords: Corrosion resistance, Coating protection method, Anti-corrosive paint, Additive, Cyclic voltammogram, Impedance

핵심용어: 내식성, 피복방식법, 방식도료, 첨가제, 사이클릭 볼타모그램, 임피던스

Abstract

There are many kinds of protection methods for marine structures, with varyingeconomical and environmental advantages. The coating protection method is being widely used in both continental and marine structures. In this study, by adding some additives, such as Zn powder(Zn), carbon black(CB) to epoxy anti-corrosive paint, the effect on the corrosion resistance was investigated throughan electrochemical method. The additive of Zn(20)+CB(10) showed the lowest passivity current density. Polarization resistance in both cyclic voltammogram and impedance measurement of an additive of Zn(20)+CB(10) was also the largest value, compared to other additives. Furthermore, rusting and bubbling was not observed on the surface of the test specimen with the additive of Zn(20)+CB(10), compared to other specimens. It is suggested that the corrosion resistance of the anti-corrosive paint can be improved by using some additives.