Inhibition of copper corrosion in aqueous sodium chloride solution by N-Octadecylbenzidine/1-Docosanol mixed Langmuir-Blodgett films

Abstract

Mixed Langmuir-Blodgett (LB) films on N-octadecylbenzidine (NODB)/l-docosanol were deposited onto a copper surface to investigate the inhibition of corrosion of copper in 3.4% sodium chloride (NaCL) solution by wietht loss, corrosion potential, and potentiodynamic polarization measurements. The surface of the copper specimen before and after corrosion was also examined by scanning electron microscopy (SEM). The mixed monolayers of NODB/l-docosanol inhibited the corrosion of copper efficiently. The inhibition efficiency increased wiht the number of monolayers, and the maximum inhibition of about 94% was obtained by 10 monolayers of basis of "blocking action" of LB films of NODB/ l-docosonal on the copper surface.