Journal of the Korean Industrial and Engineering Chemistry, Vol.16, No.2, 212-216, April, 2005
내식 방지용 고분자 나노복합재료에 관한 연구
A Study on the Polymer Nanocomposite for Corrosion Protection
E-mail:
초록
아연도금 강판의 부식을 방지하기 위하여, 방청제로서 사용하고 있는 벤조트리아졸을 유기화제로 사용하여 이를 Na-montmorillonite (Na-MMT)에 삽입시켰다. 이것을 XRD로 관찰한 결과 벤조트리아졸의 삽입으로 인하여 MMT의 충간 거리가 증가하였음을 보여주고 있다. 그리고 코팅액으로 사용하기 위하여 벤조트리아졸이 삽입된 MMT를 이용하여 수용성 poly(ethylene-co-acrylic acid) (PEA) 나노복합재료를 제조하였다. 나노복합재료는 PEA 매트릭스에 실리케이트가 단일층으로 잘분산되어 있는 박리형 나노복합재료임을 보여주고 있다. 이것을 인용하여 아연도금강판에 코팅하여 염소분무 시험한 결과 금속의 내식성을 현저히 증가시켰다. 이러한 결과는 PEA 매트릭스에 균일하게 분산되어 있는 실리케이트 층에 의한 산소투과도 감소와 방청제의 효과에 의한 것이다.
Benzotriazole which is used as a corrosion inhibitor for the zinc coated steel was intercalated into Na-MMT. X-ray diffraction experiments on intercalant/silicate composite samples demonstrated that the intercalation of intercalant leads to an increase in the spacing between silicate layers. Water soluble poly(ethylene-co-acrylic acid) (PEA) nanocomposites, to use as a coating agent, were prepared with these modified MMT. We found that mono-layered silicates were dispersed in PEA matrix and those resultants were exfoliated nanocomposites. From the result of salt spray test, we found that this coating agent prepared with water soluble poly(ethylene-co-acrylic acid) (PEA) nanocomposite provided good corrosion protection. These results were caused by decreasing the rate of oxygen permeation from silicate layers dispersed homogeneously in PEA matrix and the effect of corrosion inhibitor from benzotriazole.
Keywords:montmorillonite;benzotriazole;corrosion inhibitor;poly(ethylene-co-acrylic acid);nanocomposite
- Uhlig HH, Corrosion and Corrosion Control, 2nd., Wiley, New York (1971)
- Ryu JG, Park GR, Lyu SG, Rhew JH, Sur GS, Polym.(Korea), 22(2), 328 (1998)
- Lan T, Pinnavaia T, Chem. Mater., 6, 2216 (1994)
- Kaviratna PD, Lan T, Pinnavaia T, J. Polym. Preprints, 35, 788 (1994)
- Wang MS, Pinnavaia T, Chem. Mater., 6, 468 (1994)
- Messersmith PB, Giannelis EP, J. Polym. Sci. A: Polym. Chem., 33(7), 1047 (1995)
- Lyu SG, Park YH,Rhew JH, Sur GS, J. Ins. Ind. Tech., 26, 139 (1998)
- Choi HK, Park YH, Lyu SG, Kim BS, Sur GS, Polym.(Korea), 23(3), 456 (1999)
- Choi HK, Park YH, Lyu SG, Kim BS, Sur GS, Polym.(Korea), 23(5), 724 (1999)
- Lan T, Kaviratna PD, Pinnavaia TJ, J. Phys. Chem. Solids, 57, 1005 (1996)
- Trabanelli G, Carassiti V, Advances in Corrosion Science and Technology, 1. Plenum Press, 147 (1990)
- Scully JC, The Fundamentals of Corrosion, 3rd Ed., Pergamon Press, Oxford (1990)
- Rozenfeld IL, Corrosion Inhibitors, McGraw-Hill Inc., New York, 297 (1980)