SYNTHESIS OF β-KETOSULFIDES BASED ON BENZALACETONE AND RESEARCH INTO THEIR INHIBITORY PROPERTIES

Abstract

The interaction of benzalacetone with mercaptoacetic acid and its alkyl esters was used to synthesize and characterize new representatives of β-ketosulfides, the structure of which was proved by 1H and 13С NMR- spectroscopy. The gravimetric method was used to study the influence of the synthesized compounds on the corrosion rate of St-3 in various aggressive medium. It was established that the studied compounds inhibit the corrosion process both in single-phase acidic (0.1N HCl и 0.1N H2SO4), and in twophase (electrolyte-hydrocarbon) media. In the latter case, they are more effective - the corrosion rate of St-3 decreases from 2.1 to 0.06-0.35 g/m 2 hour, while the degree of protection against corrosion is 83.3-97.1 %. The studied compounds exhibit a greater protective effect in hydrochloric acid solution (97.1-92.45%), than in sulfuric acid (76.9-87.1%). Among the tested compounds, β-ketosulfide obtained on the basis of mercaptoacetic acid showed the highest inhibitory efficiency in both mediums.