DECREASING THE NEGATIVE ECOLOGICAL AND ECONOMICAL EFFECTS FOR CORROSION PROBLEMS OF METALLIC EQUIPMENT IN OIL FIELDS

Abstract

Surface active agents are considered as important compounds which have important applications in various industrial fields. In addition to participate in the formulation of emulsions and phase transfer catalysis, surface active agents are used as corrosion inhibitors for different metals in the corrosive media As the result of the integrated usage of the surface-active agents in several industrial fields, their improvement was urgent to synthesize new types which characterized by higher efficiency in their applications and to decrease the used dose. The unique improvement of the surface-active agents was synthesized triquaternary ammonium trimeric cationic salts (made up of three amphiphilic moieties connected by a spacer) and monomeric cationic salts to improve their adsorption at the different surfaces. That increased their efficiency as corrosion inhibitors considerably. In this thesis, three series of triquaternary ammonium trimeric cationic salts and two series of ammonium monocationic salts yielding five products acting as surface active agents were synthesized and then the chemical structures of the synthesized triquaternary ammonium trimeric cationic surfactants were corroborated using microelemental analysis, Fourier Change Infrared Spectroscopy (FTIR) and Proton Nuclear Magnetic Resonance (1HNMR) Spectroscopy. The prepared surfactants were evaluated as corrosion inhibitors for carbon steel in the deep oil wells formation water by various electrochemical techniques such as: potentiodynamic polarization measurements and electrochemical impedance measurements (EIS). In