PHYSICAL AND CHEMICAL ASPECTS OF STEEL CORROSION INHIBITION IN ACID, NEUTRAL AND HYDROGEN SULFUR ENVIRONMENTS

Abstract

In this work the protective effect of new nitrogen, amine and phosphorus-containing inhibitors synthesized on the basis of local raw materials and bottoms of vacuum distillation of monoethanolamine of chemical industry of the Republic of Uzbekistan is investigated. The process of inhibition of steel of grade St.3 in acidic and hydrogen sulfide-containing environments studied by electrochemical and gravimetric methods, depending on the concentration of inhibitors, temperature and time of exposure of the sample to the protective effect of inhibitors. It is shown that multicomponent inhibitor containing oksietiliden-difosfonovaya acid(OEDP), sodium hydroxide, zinc oxide, glycerin, water, and stillage residue of vacuum distillation of monoethanolamine (of KOMEA) can be applied for the protection of steel equipment and pipelines of the oil and gas industry. The change in the intensity of absorption spectra of active functional groups of inhibitors was discussed by IK spectroscopy. The parameters such as corrosion current, stationary potential, corrosion rate, degree of protection and the value of the effective activation energy ∆E_eff corrosions.