Development and testing of anticorrosive SiO2/phenolic–formaldehydic resin coatings

An efficient and durable option against corrosion of metallic materials has been developed through the preparation and application of thin surface films made of finely disseminated SiO2 colloidal particles, which are trapped inside either functionalized (FPFR) or unfunctionalized (PFR) phenolic–formaldehydic resin polymer networks. Impervious, resistant, and anticorrosive polymer coatings of purely resinous or resinous–inorganic natures are obtainable this way. An assessment of the anticorrosive performance of each PFR–SiO2 and FPFR–SiO2 coating, once deposited on the surface of Cu plates, has been made inside a misty saline chamber operated under accelerated corrosive conditions. The results of this test indicate that the anticorrosive efficiencies of the FPFR and FPFR–SiO2 coating films are superior than those related to the PFR and PFR–SiO2 coverings. Some relevant textural, morphological, and structural properties of the different types of coatings have been determined by FTIR spectroscopy, scanning electron microscopy and optical microscopy of standard resolution.