ELECTROCHEMICAL STUDIES OF THE PROTECTIVE PROPERTIES OF VOLATILE INHIBITORS

A series of volatile corrosion inhibitors were obtained by reacting ethanolamine and boric acid. Experiments were conducted to determine the composition and conditions for producing an inhibitor with high anti-corrosion properties, in which the reactant ratio and thei reaction temperature were varying. Based on the results of electrochemical and accelerated tests, the corrosion rate, degree of protection, and inhibition coefficient were calculated. St3 steel plates were selected as the samples on which the anti-corrosion action of the volatile corrosion inhibitors was tested. It was determined that during an electrochemical study in a 0.1 M sodium chloride solution, the best protective properties were observed when using an inhibitor based on the product of the interaction of ethanolamine and boric acid in a molar ratio of 3:1, namely tri (aminoethyl) borate. The optimal inhibitor concentration on steel surfaces during accelerated tests in an environment with a relative humidity of 100% air is 200 g / m³.