Guzal Rakhmatova2025-11-252025-11-252021-12-102311 -5459https://dspace.kstu.uz/xmlui/handle/123456789/3581ABSTRACT In this paper, the inhibitory effect of synthesized bicyclic sulfur α-aminoketones on the corrosion of metals in aggressive environments 15% HCl and 20% H2SO4, as well as 1M HCl, 1M H2SO4. The inhibitors studied were found to slow down the cathode process and inhibit metal corrosion due to electrostatic adsorption in strongly acidic environments and undistributed free electron pairs of nitrogen, sulfur, and oxygen in the molecule in weakly acidic and neutral environments. АenKeywords: inhibitor, corrosion, corrosion rate, a-piperidino-5-acetyl-2-methyl-1 -thiaine, a-morpholinio-5-acetyl-2- methyl-1 -thiaine, a-piperidino-6-acetyl- 1 -thiochroman, α-morpholino-6-acetyl-1-thiochroman, α-diethylamino-5-acetyl- 2-methyl-1 -thiaine, α-diethylamino-6-acetyl-1 -thiochroman, polar resistance, polarity resistance.Article