Corrosion mitigation is an important topic for amine-based post-combustion carbon dioxide (CO2) capture operations due to the desire to use less expensive but corrosion-vulnerable materials such as low carbon steels in the construction of a capture system. In this study, the corrosion behavior of carbon steel in an in-house solvent was investigated in a pilot-scale post combustion CO2 capture process. Carbon steel specimens were placed inside process units where corrosion problems were previously found in the stripper column and the CO2-rich amine piping. An organic compound was studied as a corrosion inhibitor and degradation inhibitor in a range of 0 to 1000 ppm. It was found that the use of this corrosion inhibitor effectively retarded the corrosion rates of carbon steel in both unit locations.

Subject
X-ray diffraction, Materials, Corrosion rate, Steel coupons, Solvents, Carbon steel pipes, Corrosion products, Amines, Corrosion inhibitors, Carbon steel, Corrosion coupons, Stainless steel, Sampling
Keywords:
carbon steel, corrosion inhibition, post-combustion CO2 capture, pilot-scale
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2018
Association for Materials Protection and Performance (AMPP)
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