Effect of Fe ion concentration on corrosion of carbon steel in CO₂environment

Abstract

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Effect of initial CaCO3 saturation levels on the CO2 corrosion of 1Cr carbon steel

“…The mechanism of CO 2 corrosion of carbon steel has been investigated by several researchers [1][2][3][4][5] and the influence of FeCO 3 (siderite) precipitation on the corrosion process is well documented. [6][7][8][9] Most of the studies have been performed in aqueous media containing various concentrations of sodium chloride. Despite the presence of calcium ions in the brines, [10,11] little attention was given to the effect of Ca 2+ on the CO 2 corrosion of carbon steel.…”

Cracking mechanism in API 5L X65 steel in a CO2-saturated environment – Part II: A study under cathodic polarisation

“…As previously mentioned, further important aspect to be understood in CO 2 corrosion is the influence of corrosion products formed on the carbon steel surface. In CO 2 -saturated aqueous environment, the formation and precipitation of iron carbonate (FeCO 3 ) and iron carbide (Fe 3 C) enrichment can occur [8] and these layers can be protective or harmful for the pipeline steel.…”

Corrosion of carbon steel under CO2 conditions: Effect of CaCO3 precipitation on the stability of the FeCO3 protective layer

“…Esmaeely et al [28] [29] have performed electrochemical tests on AISI 1018 at low and high concentration of Ca 2+ at 80 ˚C in 1 bara CO2 at pH 6. 6. Results shows that at low Ca 2+ concentration up to 100ppm, a protective layer was still able to form, reducing the corrosion rate.…”