ELECTROCHEMICAL ASPECTS OF MUTUAL EFFECTS OF SURFACE-ACTIVE CATIONS AND ANIONS OF COMBINED INHIBITORS ON ACIDIC CORROSION OF IRON

The corrosion and electrochemical behavior of iron in a 1 M H2SO4 solu tion With added 2-(2'-pyridyl)benzimidazole, sodium chloride, or sodiu m thiocyanate, as well as with their double and triple mixtures, was s tudied, The mutual effects of inhibitors on iron dissolution and hydro gen depolarization were classified in approximation of the independent influence of surfactants on the rates of electrode reactions. A relat ionship between the mutual effect of inhibitors in mixtures and the in formation entropy of a system, including single and combined additives , was shown.