Active substances of a solid corrosion inhibitor for the oil and gas industry

Abstract

This paper reports the method of synthesis and the results of the investigation of the components of a solid corrosion inhibitor intended for the protection of equipment of gas-condensate and oil wells. 1-Amidohydroxystearate-diethyldiamine-2-hydroxystearylimidazoline was synthesized by the interaction of hydroxystearic acid with triethyltetramine. By chemical transformation of pork fat with triethyltetramine, amidoamines of fatty acids were synthesized. The passage of the relevant chemical reactions was confirmed by the methods of infrared spectroscopy and gas chromatographic analysis. The gravimetric method was used to investigate the inhibitory properties of the synthesized substances with respect to 08 ps steel in a simulated corrosive medium. The optimal ratio between 1-amidohydroxystearate-diethyldiamine-2-hydroxystearylimidazoline and amidoamines of fatty acids in the composition of the corrosion inhibitor in a new commercial form (solid) was established. It was shown that the use of amidoamines of fatty acids as part of a corrosion inhibitor helps to reduce its softening temperature and improve plasticity and solubility.