Petrochemical Compound-Based Corrosion Inhibitors

Abstract

The results of applying intermediate products and petrochemical wastes for making corrosion inhibitors are analyzed herein. Behavior of a number of 1,3-diheterocycloalcanes-based corrosion inhibitors is reviewed. Analysis of corrosion-electrochemical test results with steel samples to be applied in oil and gas facilities construction has become the principal approach to this study. Kinetic parameters of cathodic reactions are found by analyzing Tafel sections of polarization curves taken in the blank medium while injecting various compounds thereto. Experimental criteria defining the mechanism of cathodic release of hydrogen both in uninhibited and inhibited acidic corrosive media are found. 1,3-dioxolane derivatives are not demonstrated to actually affect the cathodic reaction parameters but they are blocking inhibitors; while oxazines and carbamates are mixed inhibitors. The results of corrosion-electrochemical tests may be used to study the mechanism of the corrosion inhibition with the studied compounds.