CO₂ Corrosion Behavior of 20G steel Based on Orthogonal Test

The effects of six factors on the CO₂ corrosion behavior of 20G steel were investigated by orthogonal test. The corrosion product films were analyzed by scanning electron microscopy (SEM) and X-ray diffraction (XRD). The results show that temperature was the biggest influence factor, followed by chloride ion concentration in the CO₂ corrosion process of 20G steel. The corrosion products of the 20G steel corroded in CO₂ environment were mainly composed of FeCO₃, and its morphology had certain influence on corrosion rate.