Deposition of polyaniline/silica nanocomposite coating on stainless steel; study of its corrosion properties

摘要

In the present century many efforts have been done to develop efficient methods for corrosion protection of steel in various industries. The use of conducting polymers is one of the new developments in the area. In this study, polyaniline/silica nanocomposite has been coated onto 316L stainless steel via in situ method. The corrosion behaviors of the bare and coated steels have been studied in order to reveal influence of silica nanoparticles (70nm).The prepared coating has been characterized using X-ray diffraction (XRD). The corrosion performance of the coating has been investigated in 1 M H_2SO_4 solution by using electrochemical impedance spectroscopy (EIS). It was found that protecting effect of coated layer is influenced by amounts of silica nanoparticles.