Corrosion Protection of Steel Pipelines Against CO 2 Corrosion-A Review

Abstract

One of the serious problems of oil extracting indus try is the corrosion process. The successful applic ation of carbon steels in oil and gas pipelines and production tubular in Carbon Dioxide (CO 2) containing environments depends mainly on either the formation of protective corrosion product film or the use of corrosion inhibitors. The mechanism o f corrosion of carbon steel in media containing CO 2 is complex, and in dependence on the prevailing co nditions it may lead to general or local corrosion and corrosion cracking. The inhibition me chanism is attributed to the strong adsorption abil ity of the selected inhibitors on steel surface, forming a good protect ive layer, which isolates the surface from the aggr essive environment. The current state of research in corrosion protecti on of steel pipelines against CO 2 corrosion is surveyed. The review covers CO 2 corrosion and its inhibition. The influence of inh ibitors molecular structure on corrosion layers in CO 2 corrosion is discussed.