A study on environmental friendly silane primer on coil substrate

In this paper, corrosion resistance and adhesion of environmental friendly silane primer on coil substrate was studied. Primer was formulated by using silanes via acid hydrolysis and condensation reaction. Three different formulations (5%, 15% and 30%) were developed on the basis of sol/water ratio. 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.