Electrochemical study on the effect of a double Sc hiff base and its cobalt complex on the acid corrosion of ca rbon steel

The use of inhibitors is one of the mo st practical methods to secure metals against acid corrosi on. Most of the well known a cid inhibitors are organic compounds containingnitrogen, sulphur, and oxyge n atom [۱, ۲].Schiff ba ses general ly become effective corrosion inhibito rs due to the presence of an imine (–CH=N) group and conjugated doubl e bonds. Besides the imine group, subs titution of different groups also affects the inhibition pr operties [۳]. Th e ability of donor- molecules to form stable complexes clos ely packed in the coordination sphere of meta l ion intr oduces another class of compo unds for corrosion inhibition. However, studies about the e ffect of metal comple xes as corrosion inhi bitor for steel in acid solution appeared in the lite rature are extremely limited. The aim of the present work is to study the corrosi on behaviour of carbo n steel in ۲ M hydrochloric acid in the presence of a Schiff base-[۴-((۱E)-۲ -(۲-pyridil)-۱ azavini yl)phenyl]( ۱Z)-۲-(۲-py ridil)-۱- azaethene and its corresponding cobalt c omplexes.

کلیدواژه ها:

Schif f base ، Com plex ، Corro sion inhibition ، Carbon steel