Anticorrosion performance of eco-friendly silane primer for coil coating applications
- 作者：Gunjan Gupta ; gunjan.iitian@gmail.com ; S.S. Pathak ; A.S. Khanna
- 关键词：Silane (Sol&ndash ; gel) ; Corrosion resistance ; Coil coating ; Aluminium ; Environment friendly ; Primer
- 刊名：Progress in Organic Coatings
- 出版年：2012
- 期刊代码：70_03009440
- 类别：ce
- 出版时间：May, 2012
- 卷：74
- 期：1
- 页码：106-114
- 文件大小：1941 K
摘要
In this paper, corrosion resistance and adhesion of environmental friendly silane primer on coil substrate was studied. Primer was formulated by using methyltrimethoxysilane and 3-glycidoxypropyltrimethoxysilane via acid hydrolysis and condensation reaction. Three different formulations (5%, 15%and 30%) were developed on the basis of sol/water ratio. Aluminium coils was dipped into primer and cured at 120 掳C for 20 min. Fourier Transform Infrared Spectroscopy and Scanning Electron Microscope was used to analyse the structural and morphological behaviour of the coating. Corrosion resistance of the coating was evaluated by salt-spray test and potentiodynamic polarization measurement. The adhesion behaviour of the coating was investigated by cross hatch test, before and after salt-spray immersion. Results showed that 15 wt%sol content showed significant improvement in the corrosion resistance, adhesion of the coating and its UV resistance. Silane primers have excellent adhesion with substrate and commercial grade polyester, polyurethane and polyvinyldiene fluoride top coats.