| Corrosion behavior and characteristics of the product film of API X100 steel in acidic simulated soil solution |
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| 作者姓名： | Cui-wei Du Tian-liang Zhao Zhi-yong Liu Xiao-gang Li Da-wei Zhang |
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| 作者单位： | Corrosion and Protection Center, University of Science and Technology Beijing, Beijing, 100083, China |
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| 基金项目： | This work was financially supported by the National High-Tech Research and Development Program of China(2012AA040105)，the National Nature Science Foundation of China(.51131001 and 51741034)，the Beijing Higher Education Young Elite Teacher Project |
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| 摘 要： | The short-term corrosion behavior of API X100 steel in an acidic simulated soil was investigated by electrochemical measurements and soaking experiments, followed by corrosion morphology observations and X-ray photoelectron spectroscopy analyses. The results show that X100 steel exhibits an obvious pitting susceptibility in an acidic soil environment. Pits nucleate after approximately 10 h of immersion. Along with the nucleation and growth of the pits, the charge-transfer resistance and open-circuit potential first increase sharply, then decrease slowly, and eventually reach a steady state. The maxima of the charge-transfer resistance and open-circuit potential are attained at approximately 10 h. The evolution of the electrochemical process is confirmed by the analysis of the product film. The product film exhibits a porous and loose structure and could not protect the substrate well. The product film is primarily composed of ferrous carbonate and ferrous hydroxide (Fe(OH)2). The concentration of Fe(OH)2 in the product film increases from the inside to the outside layer.
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| 关 键 词： | oil pipelines steel corrosion acidic environment pitting corrosion corrosion films |
Corrosion behavior and characteristics of the product film of API X100 steel in acidic simulated soil solution |
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| Cui-wei Du,Tian-liang Zhao,Zhi-yong Liu,Xiao-gang Li,Da-wei Zhang.Corrosion behavior and characteristics of the product film of API X100 steel in acidic simulated soil solution[J].International Journal of Minerals,Metallurgy and Materials,2016,23(2):176-183. |
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| Authors: | Cui-wei Du Tian-liang Zhao Zhi-yong Liu Xiao-gang Li Da-wei Zhang |
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| Affiliation: | Corrosion and Protection Center, University of Science and Technology Beijing, Beijing 100083, China;Key Laboratory of Chinese Ministry of Education for Corrosion end Prevention, University of Science and Technology Beijing, Beijing 100083, China |
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| Abstract: | The short-term corrosion behavior of API X100 steel in an acidic simulated soil was investigated by electrochemical measurements and soaking experiments, followed by corrosion morphology observations and X-ray photoelectron spectroscopy analyses. The results show that X100 steel exhibits an obvious pitting susceptibility in an acidic soil environment. Pits nucleate after approximately 10 h of immersion. Along with the nucleation and growth of the pits, the charge-transfer resistance and open-circuit potential first increase sharply, then decrease slowly, and eventually reach a steady state. The maxima of the charge-transfer resistance and open-circuit potential are attained at approximately 10 h. The evolution of the electrochemical process is confirmed by the analysis of the product film. The product film exhibits a porous and loose structure and could not protect the substrate well. The product film is primarily composed of ferrous carbonate and ferrous hydroxide (Fe(OH)2). The concentration of Fe(OH)2 in the product film increases from the inside to the outside layer. |
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| Keywords: | oil pipelines steel corrosion acidic environment pitting corrosion corrosion films |
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