Corrosion of N80 carbon steel in oil field formation water containing CO2 in the absence and presence of acetic acid |
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| Authors: | SD Zhu AQ Fu J Miao ZF Yin GS Zhou JF Wei |
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| Affiliation: | aSchool of Materials Science and Engineering, Xi’an Jiaotong University, Xi’an 710049, China;bThe Key Laboratory for Mechanical and Environmental Behaviour of Tubular Goods, Tubular Goods Research Institute, CNPC, Xi’an 710065, China;cResearch Institute of Shaanxi, YanChang Petroleum (Group) Co. Ltd., Xi’an 710075, China |
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| Abstract: | Corrosion behaviour of N80 carbon steel in formation water containing CO2 was studied by polarization curve technique, electrochemical impedance spectroscopy, weight loss test, scanning electron microscope, and X-ray diffraction. Effects of temperature and acetic acid concentration on the corrosion behaviour of N80 carbon steel were discussed. The results showed that increasing temperature not only enhanced the dissolution of steel substrate, but also promoted the precipitation of FeCO3, the addition of acetic acid enhanced localized corrosion attack on N80 carbon steel. FeCO3 was the main corrosion product. And there was a transition region between CO2 corrosion control and HAc corrosion control. |
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| Keywords: | A Steel B EIS B Weight loss B SEM C Acid corrosion |
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