The effect of coupling agents on the anti-corrosion properties of acrylic latex coatings

The anti-corrosion ability of acrylic latex coatings was enhanced by the in troduction of silane coupling agents to the coating/metal interface. The in fluence of coupling agent type, its dosage, and the treating method upon th e performance of corrosion resistance were investigated. Electrochemical im pedance spectroscopy (EIS) and adhesive strength measurements were used to study the corrosion protection of the latex coatings. The results have show n that a steel substrate, pretreated with methacryloxypropyl trimethoxysila ne and cured at 120 degrees C, exhibited excellent anti-corrosive performan ce, This could be attributed to the formation of a new interfacial layer, w ith its high hydrophobicity, strong adhesive strength, and minimization of layer defects.