«Proceedings of Gubkin University»

Study of protective effect of corrosion inhibitors based on surfactants and potassium iodide in aggressive environments

UDC: 622.276.63
DOI: 10.33285/2073-9028-2022-3(308)-139-154

Authors:

¹ Gubkin Russian State University of Oil and Gas (National Research University), Moscow, Russian Federation

Keywords: electrochemical corrosion, surfactants, corrosion inhibitors, potassium iodide, carbon dioxide, hydrogen sulfide, hydrochloric acid, sulfamic acid, hydrodynamic conditions

Annotation:

In this work, the corrosion rate was studied by electrochemical method in carbon dioxide, carbon dioxide with hydrogen sulfide, sulfamic and hydrochloric acids under static and dynamic conditions (the velocity of the medium is 0.5 and 1.0 m/s) with the addition of inhibitors based on cationic surfactant with additives of anionic surfactant and potassium iodide. The aim of the work was to identify the regularities of the corrosion process in the studied conditions, as well as to determine the effect of additives of anionic surfactant and potassium iodide on the protective effect of an inhibitory composition based on cationic surfactant. Based on the results of the work, the main patterns of corrosion processes in the studied media were confirmed, taking into account the factor of the flow of the medium, and the mechanisms of inhibitor adsorption were demonstrated, confirming the positive effect of the additives used on improving the protective ability of the cationic surfactant due to the beneficial effect on the inhibitor adsorption process.

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