Acid corrosion of iron in the presence of mixtures of anionic additives and compounds of the reaction series of o-hydroxyazomethine derivatives with nucleophilic substituents

The effects of halide-and sulfur-containing additives on iron corrosion in 1 M H₂SO₄ in the presence of nucleophilic o-hydroxyazomethine derivatives are studied. Dependences of the inhibition factor (as well as its sensitivity to a change in the polarity of the substituents) and the effective activation energy on the nature and concentration of both the groups of additives are interpreted in terms of the Linear Gibbs Energy Relation (LGER) and the principle of Hard and Soft Acids and Bases (HSAB). Original Russian Text ? V.P. Grigor’ev, V.V. Boginskaya, 2006, published in Zashchita Metallov, 2006, Vol. 42, No. 6, pp. 627–631.