The Performance Corrosion Protection of Self-Assembled Copper Phthalocyanine/Nanostructure Hybrid Coating on Carbon Steel in Acidic Solution

In this study, performance corrosion protection of simultaneous self assembled thin layer copper phthalocyanine sulfonated together with nanostructured hybrid inorganic- organic coatings on carbon steel in acidic solution was investigated. Hybrid sol was synthesized via acid catalyzed hydrolysis and condensation of methacryloxypropyl trimethoxysilane (TMSM) and tetraethoxysilane (TEOS) at the molar ratio of 1:1. The morphology and composition of carbon steel coated with hybrid coating and self assembled CuPh was examined by SEM, EDX and FTIR. The performance corrosion protection of the hybrid coatings was investigated with polarization scans and electrochemical impedance spectroscopy (EIS) in aerated 0.5 mol L-1 HCl solution. Self assembled CuPh films coated under the hybrid coating showed a strong influence on its corrosion resistance, mainly when the samples have 24h immersion time and 1 mM concentration. Addition of inhibitor to anti corrosion system, improved the protection of carbon steel in HCl 0.5M solution up to 94%. Th