Effects of H2O and SO2 on oxidation in a CO2 environment. Experiments at 1 and 25 bar at 700° to 800°C in CO2, CO2+10%H2O and CO2+10%H2O+0.1%SO2. Alloys S30409, N07230, N07208 and superalloy N07247 exposed. Reaction products were characterized.
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Results from novel transparent autoclave experiments. Carbon steel corrosion coupons were exposed to impurities levels within established specifications at simulated transport conditions (25 °C and 10 MPa of CO2).
This paper re-examines most public and in-house corrosion data on the effects of six typical impurities to advance the fundamental understanding of how pipeline steels corrode in sc-CO2 environments and identify knowledge gaps for further investigations.
Cyclic polarization measurements were used to illustrate the corrosion and passive behavior of the stainless steels under the tail gas conditions. Electrochemical behavior of stainless steels in SO2-saturated solutions with various concentrations of Cl- and F- was also studied.