corrosion protection of copper by tio2 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.