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

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.