Examination of trialkyl-substituted sulfonium, selenonium, and telluroniumsalts as inhibitors of acid corrosion of iron and steel

The effect of a number of trialkyl-substituted sulfonates, selenates, and t ellurates on free corrosion and its partial processes on iron and steels in sulfuric and hydrochloric acid solutions was examined with the use of grav imetric, voltammetric, and capacitance methods. The considered onium compou nds of the elements of 6A group, especially with aromatic substituents, wer e shown to be inhibitors of acid corrosion. The higher the effective charge on the heteroatom, the more effective the inhibitors; the effectiveness in creases in the presence of specifically adsorbing iodine ions.