Corrosion Behavior of X70 Pipeline Steel in Undisturbedly Polluted Soil

Corrosion behavior of X70 pipeline steel in undisturbedly polluted soil was studied by using polarization curve technique,electrochemical impedance spectroscopy(EIS),scanning electron spectroscopy(SEM),and EDS.The results of EIS spectra exhibited single capacitive loop model.Slight fissure could be found on the surface of X70 pipeline steel.The elements of corrosion products were complex,and the content of O element reached 16.56%.