The inhibition effect of some pyrimidine derivatives on austenitic stainless steel in acidic media

▶ In this study we examine the inhibition efficiencies of pyrimidine compounds in 0.5 M H2SO4. ▶ The efficiency increases with the inhibitor concentration and the presence of the sulphur atom. ▶ Adsorption of the inhibitors on stainless steel surface is spontaneous. ▶ Also Dubinin-Radushkevich model suggests that DHPMs are adsorbed by physical mechanism.