Efficiency of Applying Inhibitor to Control Internal Corrosion in Gas Pipeline Systems

Abstract

Utilization of film-former corrosion inhibitors is one of the most reliable and economical ways of controlling internal corrosion of oil and gas pipeline systems. The current study sheds light on the feasibility range of the success of the application of corrosion inhibitor "amines base filming inhibitor" in the gas pipeline 34" BMK "Brega-Misurata-Khoms" by utilizing various ways such as monitoring techniques, test and analysis methods, injection rate of inhibitor and efficiency of corrosion inhabitation. Internal corrosion is monitored by different techniques such as electrical resistance (E/R) probe using cosasco corrocometer model CK-3, direct specimens of dry gas and intelligent pig surveys. The samples of the last two methods of monitoring are achieved by chemical analysis in laboratory of Sirte Oil Company. This chemical analysis is accomplished to determine the content of compounds in the gas, for instance iron/iron oxide, sulphur, carbon dioxide and hydrogen sulphide, etc. In reality, the internal corrosion rate of the inner surface of the pipeline system is negligible in comparison with standard criteria of corrosion. Furthermore, assessment of the film-forming corrosion inhibitor was found roughly sufficient to provide an excellent internal corrosion inhabitation because of the environmentally friendly properties of the gas, as a dry and sweet gas.