Acid corrosion inhibitors based on oleic acid amides

by

A.S. Chernova, A.A. Islamutdinova, E.K. Aminova, V.A. Idrisova

 Branch of the Ufa State Petroleum Technical University in Sterlitamak, RF, Republic of Bashkortostan, Sterlitamak, October Av., 2

E-mail: k.elmira.k@yandex.ru

DOI: 10.33075/2220-5861-2022-1-43-48

UDC 620.1

Abstract:

   In this paper, the use of corrosion inhibitors is proposed as a promising environmental method of protecting structural steel from acid corrosion. The paper shows the possibility of using oleic acid amides containing a sulfogroup as well as their salts as acid corrosion inhibitors. The studied compounds were obtained by three successive syntheses, optimal conditions for the quantitative production of target products were selected. The physicochemical characteristics of the obtained compounds were determined. In the course of the study, two water-soluble compounds and six water-soluble compounds were obtained to test for anticorrosive properties. The anticorrosive properties of potential acid corrosion inhibitors were studied under static conditions with a concentration of hydrochloric acid of 1 M at 20 ° C.

   In solutions with a concentration of hydrochloric acid of 1 M, all the amides obtained and their salts exhibited high anticorrosive activity. Sulfated oleic acid amides at a concentration of 0.1 g/l showed a high protective effect in a solution with a hydrochloric acid concentration of 5 m. Sulfated oleic acid amides can be recommended for use to protect equipment, as potential inhibitors when etching carbon steels with hydrochloric acid.

Keywords: acid corrosion, inhibitors, amides, environmental problem, organic synthesis, protective effect, anticorrosive properties.

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