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

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 temperatures. rates the measured room temperature, 100 °C 180 °C. phase structure products morphologies samples characterized. results show that increased first then decreased increase in temperature. peaked °C, reaching 0.8463 mm/y 0.8500 mm/y, respectively. CO2 main controlling factor corrosion. FeS FeCO3. rate temperature lower than lowest. 0.2291 0.2309 not product FeS. High aggravated carbon-steel further high concentration a loose corrosion-product film formed. dense uniform corrosives formed attached to surface substrate, inhibited Dense steel A small amount H2S progress