Corrosion Resistance of Silane Modified Concrete

Silane modification is one of the common techniques used for enhancing the corrosion resistance of carbon steel in concrete, due to the superior penetrability and hydrophobicity of silane. Octyl triethoxysilane(OTES) was taken to modify the concrete surface. The results of IR spectra, contact angle, water absorption and electrochemical tests showed that a hydrophobic layer with water contact angle over 100°was formed on the micropore surface of concrete through the hydrolysis and condensation reactions of silane, resulting in a significant decrease of water absorption and enhancement of corrosion resistance of concrete.