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The semi-conductive performances of hot growth film on 316L stainless steel were studied by means of electrochemical impedance spectroscopy(EIS) and Mott-Schottky analysis.The chemical compositions of the hot growth films were detected by X-ray photoelectron spectroscopy(XPS).The results show that the transfer resistance and film resistance increase with increasing temperature to 400℃,then they decrease sharply with further continuously increasing temperature.Formation time plays an important role in determining the electron properties of the hot growth film,when formation time reaches to 1 d,the transfer resistance and film resistance reach to the maximum value.Hot growth film has better anticorrosion behaviour in bicarbonate/carbonate solution containing chloride ions or sulfide ions.Mott-Schottky analysis reveals that hot growth film has n-p type semi-conductive property.XPS results show that the hot growth film is mainly composed of the inner chromium oxide and the outer iron oxide.
The semi-conductive performances of hot growth film on 316L stainless steel were studied by means of electrochemical impedance spectroscopy (EIS) and Mott-Schottky analysis. The chemical compositions of the hot growth films were detected by X-ray photoelectron spectroscopy (XPS). The results show that the transfer resistance and film resistance increase with increasing temperature to 400 ° C, then they decrease sharply with further increasing increasing temperature. Formation time plays an important role in determining the electron properties of the hot growth film, when formation time reaches to 1 d, the transfer resistance and film resistance reach the maximum value. Hot growth film has better anticorrosion behavior in bicarbonate / carbonate solution containing chloride ions or sulfide ions. Mott-Schottky analysis reveals that hot growth film has np type semi-conductive property .XPS results show that the hot growth film is mainly composed of the inner chromium oxide and the outer iron oxi de.