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J. Ocean Eng. Technol. > Volume 25(1); 2011 > Article
J. Ocean Eng. Technol. 2011;25(1):32-38.    
DOI: https://doi.org/10.5574/KSOE.2011.25.1.032   

Corrosion Resistance of Galvanized Steel by Treating Modified Si Organic/Inorganic Hybrid Coating Solution
Seo Hyun-Soo,Moon Hee-Joon,Kim Jung-Ryang,Kim Jong-Soon,Ahn Seok-Hwan,Moon Chang-Kwon,Nam Ki-Woo
Defence Agency for Technology and Quality,Graduate school Pukyong National University,Graduate school Pukyong National University,NGE Tech Ltd.,Bukyong Education Center for Vehicle Safety Component Technology Pukyong National University,Materials Scien
Si 변성 유/무기 하이브리드 코팅액에 의한 아연도금강판의 내식특성
서현수,문희준,김정량,김종순,안석환,문창권,남기우
국방기술품질원,부경대학교 대학원,부경대학교 대학원,엔지텍,부경대학교 수송기계안전편의융합부품소재인재양성센터,부경대학교 신소재공학부,부경대학교 신소재공학부
© 2011 The Korean Society of Ocean Engineers     Open access / Under a Creative Commons License
Keywords: Organic/inorganic hybrid, Electrolytic galvanized, Hot-dip galvanized, Salt spray test, Coating solution, White rust
핵심용어: 유/무기 하이브리드, 전기아연도금, 용융아연도금, 염수분무시험, 코팅액, 백청
Abstract
Galvanized steel has gone through a chemical process to keep it from corroding. The steel gets coated in layers of zinc because rust will not attack this protective metal. For countless outdoor, marine, or industrial applications, galvanized steel is an essential fabrication component. The reduction of the corrosion rate of zinc is an important topic. In the past, a very popular way to reduce the corrosion rate of zinc was to use chemical conversion layers based on $Cr^{+6}$. However, a significant problem that has arisen is that the use of chromium salts is now restricted because of environmental protection legislation. Therefore, it is very important to develop new zinc surface treatments that are environmentally friendly to improve the corrosion resistance of zinc and adhesion with a final organic protective layer. In this study, a Urethane solution (only Urethane 20 wt.%; S-700) and an organic/inorganic solution with Si (Si polysilicate 10 wt.% + Urethane 10 wt.%; LRO-317) are used. Based on the salt spray test of 72 h, S-700 and LRO-317 had a superior effect for the corrosion resistance on EGI and HDGI, respectively.


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