Corrosion Protection of Copper by TiO 2 Nanoparticles and SN Schiff base Coating

The corrosion protection abilities of modified copper in 2-[((Z)-1-{6- [(2-sulfanylphenyl)ethanimidoyl]-2-pyridyl}ethylidene) amino]-1- benzenthiol solution containing TiO2 nanoparticles were evaluated by Tafel polarization and impedance spectroscopy in 3.5% sodium chloride solution. The samples were characterized by energy dispersive X-ray (EDX) and scanning electron microscopy (SEM). The electrochemical results indicated corrosion resistance of this coating depends on the concentration of TiO2 nanoparticles and assembling time at this solution. After immersing copper for 10 min in Schiff base solution containing 150 mg L-1 nanoparticles, the coating was able to protect the copper against corrosion about 97%. Results indicated high ability of coating at high temperature and immersing time in sodium chloride solution.