Corrosion behavior of carbon steel in H2S-CO2-H2O-methyldiethanolamine (MDEA) solution under the presence of chloride ions

Wu, Guiyang; Gu, Xikui; Zhao, Wei; Fan, Rui; Mao, Ting

doi:10.1108/acmm-12-2020-2420

Cited by 4 publications

(1 citation statement)

References 16 publications

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“…The number of corrosion pits on the surface of the sample corroded at 180 °C was the lowest, which was consistent with the calculated corrosion rate. Moreover, it was consistent with Wu et al [26]'s finding that in environments containing only CO2, the corrosion rate of carbon steel increases with the increase in temperature, but in the presence of H2S, the corrosion rate decreases with the increase in temperature.…”

Section: Surface-morphology Observationsupporting

confidence: 91%

Effect of Temperature on Corrosion Behavior and Mechanism of S135 and G105 Steels in CO2/H2S Coexisting System

Gao

Shang

Zhang

et al. 2022

Metals

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The corrosive environment of oilfield condensate water was simulated at different temperatures with CO2/H2S. Weight-loss corrosion tests were conducted on S135 and G105 steels at different temperatures. The corrosion rates of the S135 and G105 were measured at room temperature, 100 °C and 180 °C. The phase structure of the corrosion products and the corrosion morphologies of the samples were characterized. The results show that the corrosion rates of the S135 and G105 increased at first and then decreased with the increase in temperature. The corrosion rates peaked at 100 °C, reaching 0.8463 mm/y and 0.8500 mm/y, respectively. CO2 was the main controlling factor in the corrosion. The corrosion products were FeS and FeCO3. The corrosion rate at room temperature was lower than that at 100 °C. The corrosion rate at the temperature of 180 °C was the lowest. The corrosion rates of the S135 and G105 were 0.2291 mm/y and 0.2309 mm/y, respectively. CO2 was not the main controlling factor in the corrosion. The corrosion product was FeS. High temperatures aggravated the carbon-steel corrosion further in the environment with the high concentration of CO2 and a loose corrosion-product film formed. The dense and uniform FeS corrosives formed and attached to the surface of the substrate, and inhibited corrosion. Dense and uniform FeS products formed on the surface of the steel with the increase in temperature. A small amount of H2S inhibited the progress of the corrosion.

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Section: Surface-morphology Observationsupporting

confidence: 91%