Abstract
CO2 corrosion has emanated as a significant concern in the oil/gas industry owing to the aging of its oilfields. Thus, corrosion protection is significant for maintaining the integrity and sustainability of pipelines, surface facilities, and downhole tools in the oil/gas sector. The present study evaluates the corrosion inhibitory properties of three oxazolone derivatives in CO2 saturated 3.5 weight% NaCl solution against API5LX60 carbon steel used in certain wells and oil/ gas transportation pipelines. The inhibitory behavior was investigated utilizing gravimetric and electrochemical techniques viz. EIS, PDP, and LPR. Electrochemical and Gravimetric technique results were in congruence. EIS asserts capacitive behavior, and PDP affirms oxazolones as mixed inhibitors. SEM and SEM-EDX confirmed the formation of a protective layer by adsorption. At an optimum inhibitor concentration of 200 ppm, inhibitor I exhibited 91.30% inhibition—linear correlation coefficient R2 value of 0.99 avowed adsorptions via Langmuir Isotherm.
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