Titanium-containing organic-inorganic hybrid coatings: effect of the amount of the coupling reagent

Organic-inorganic hybrid coatings (OIHCs) for corrosion protection represent a very important class of organic-inorganic hybrid materials. It has attracted much attention recently due to people's awareness of environmental friendliness. The OIHCs display various advantages compared to pure organic or inorganic coatings, such as low volatile organic content (VOC), good anti-corrosion and adhesion properties on metal substrate. Here, a series of OIHCs have been prepared by using titanium tetraisopropanolate (TTIP) as the titanium source and glycidyl ether oxypropyl trimethoxysilane (GPTMS) as the coupling reagent. The amount of GPTMS used for the preparation have been adjusted and the corrosion protection performance has been studied. A high corrosion efficiency of 99.3% is achieved of the hybrid coatings on Cu substrates.