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| Effect of Temperature on the Electrochemical Properties of CO2 Corrosion on N80 Steel in Stratum Water |
| 西安交通大学材料科学与工程学院 |
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Abstract The effect of temperature on CO2 corrosion process of N80 steel in simulated stratum water was detected using electrochemical impedance spectroscopy (EIS).The results showed that in the spectroscopy appeared three time constants,i.e.,the capacitance of high frequency,the inductance of middle and low frequency,the capacitance of low frequency. The capacitance appearing at high frequency is related to the capacitance of the double layer and transfer resistance, the inductance is attributed to the dissolution of the film, and the capacitance of low frequency is related to the formation of the film. With the temperature increasing, the inductance shrank, and the capacitance in low frequency enlarged, these indicated that increas temperature may accelerate the formation of the corrosion film. The transfer resistance of corrosion process increased with the increment of temperature and prolonging the immersion time,this is related to the compact property of the corrosion film.
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Received: 01 August 2006
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