Electrochemical corrosion behavior of Fe 3 Al in H 2 S-CO 2 -Cl − environment

The electrochemical impedance spectroscopy and Electrochemical Noise were employed to investigate the electrochemical behavior of Fe3Al in H2S-CO2-Cl− environment under normal pressures and temperatures. The results indicate that Fe3Al has excellent self-passivating repair ability in H2S-CO2-Cl− environment. Meanwhile, by extending corrosion time, the type of corrosion changes from pitting corrosion to intergranular corrosion and finally to denudation. The flocculent and porous corrosion products are formed on the surface of Fe3Al. After the corrosion product falling off, fracturing morphology is observed and the corrosion products mainly include FeS, FeCO3, Al(OH)3, Al2O3, Cr2O3, etc.