赵国仙,丁浪勇,刘冉冉,王映超,张思琦,董博星,宋洋.抗微生物腐蚀管材在SRB/CO2环境中膜特征及其腐蚀行为[J].表面技术,2023,52(9):220-231.
ZHAO Guo-xian,DING Lang-yong,LIU Ran-ran,WANG Ying-chao,ZHANG Si-qi,DONG Bo-xing,SONG Yang.Film Characteristics and Corrosion Behavior of Anti-microbial Corrosion Pipe in SRB/CO2 Environment[J].Surface Technology,2023,52(9):220-231 |
| 抗微生物腐蚀管材在SRB/CO2环境中膜特征及其腐蚀行为 |
| Film Characteristics and Corrosion Behavior of Anti-microbial Corrosion Pipe in SRB/CO2 Environment |
| 投稿时间：2022-08-16 修订日期：2023-01-11 |
| DOI：10.16490/j.cnki.issn.1001-3660.2023.09.018 |
| 中文关键词: 抗微生物腐蚀管材 硫酸盐还原菌 CO2 生物膜 |
| 英文关键词:anti-microbial corrosion pipe sulfate reducing bacteria CO2 biofilm |
| 基金项目: |
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| Author | Institution |
| ZHAO Guo-xian | School of Materials Science and Engineering, Xi'an University of Petroleum, Xi'an 710065, China |
| DING Lang-yong | School of Materials Science and Engineering, Xi'an University of Petroleum, Xi'an 710065, China |
| LIU Ran-ran | School of Materials Science and Engineering, Xi'an University of Petroleum, Xi'an 710065, China |
| WANG Ying-chao | School of Materials Science and Engineering, Xi'an University of Petroleum, Xi'an 710065, China |
| ZHANG Si-qi | School of Materials Science and Engineering, Xi'an University of Petroleum, Xi'an 710065, China |
| DONG Bo-xing | School of Materials Science and Engineering, Xi'an University of Petroleum, Xi'an 710065, China |
| SONG Yang | Xi'an Moore Petroleum Engineering Laboratory Limited Company, Xi'an 710065, China |
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| 中文摘要: |
| 目的 通过试验观察硫酸盐还原菌(SRB)/饱和CO2对抗微生物腐蚀管材的腐蚀特征，探究SRB对CO2腐蚀的影响。方法 通过细菌计数得到有、无饱和CO2环境中浮游SRB的生长曲线。通过浸泡试验，获得SRB、饱和CO2、SRB+饱和CO2(3种不同环境)对腐蚀速率的影响。采用SEM、EDS及XRD对试样在3种不同环境中腐蚀后的表面形貌、腐蚀产物的成分及物相组成进行分析。通过腐蚀电化学测试，研究3种不同环境中对抗微生物腐蚀管材腐蚀的影响。结果 CO2腐蚀和SRB腐蚀相互抑制，同时CO2作为SRB生长的迟效碳源，为SRB的二次生长提供能量。整个腐蚀过程受CO2腐蚀、细菌正常生长代谢形成生物膜、膜层易开裂和脱落等影响。浸泡15 d后，极化电阻呈现Rp(SRB)>Rp(SRB+饱和CO2)>Rp(CO2)规律。在含SRB环境中，由于SRB参与腐蚀反应后，将硫酸盐还原产生H2S，H2S与Fe2+反应生成FeS，少许FeS与空气接触会生成单质S，使得该环境中检测出的S元素比无菌环境中高。结论 SRB+饱和CO2环境中，生物膜的形成提高了腐蚀产物膜的结合力，导致穿越膜层的腐蚀性离子减少，减缓了腐蚀，所以SRB的存在对抗微生物腐蚀管材的CO2腐蚀具有明显抑制作用。 |
| 英文摘要: |
| The work aims to observe the corrosion characteristics of sulfate reducing bacteria (SRB)/saturated CO2 on anti-microbial corrosion pipe through experiments, so as to explore the effect of SRB on CO2 corrosion. Through the bacterial culture experiment in the biochemical incubator at a constant temperature of 40 ℃, the 15-day growth curve of planktonic SRB in the environment with and without saturated CO2 was obtained by the method of blood plate counting. The effects of SRB, saturated CO2 and SRB + saturated CO2 (three different environments) on the corrosion rate were obtained by immersion corrosion test in the biochemical incubator with a constant temperature of 40 ℃. The surface morphologies after corrosion in three different environments were analyzed by scanning electron microscope (SEM). The composition and phase composition of corrosion products in three different environments were analyzed by energy dispersive spectroscopy (EDS) and X-ray diffractometer (XRD). The corrosion electrochemical tests were carried out in a 40 ℃ water bath to study the effects of three different environments on the corrosion of microbial corrosion pipes. The results of bacterial culture in the presence and absence of saturated CO2 showed that CO2 could be used as a delayed carbon source for the growth of SRB and provide energy for the secondary growth of SRB. The results of corrosion immersion test showed that the corrosion rate was the highest in saturated CO2 environment, the second in SRB environment and the lowest in SRB + saturated CO2 environment. The results of SEM analysis indicated that the corrosion product film formed in CO2 environment showed serious cracking phenomenon, and the corrosion was the most serious. Many bacteria gathered together in SRB environment and adhered to EPS to form a similar network biofilm, which was more and relatively continuous than that in the SRB + saturated CO2 environment. The results of EDS analysis showed that in the environment containing SRB, the sulfur element detected in the environment was higher than that in the aseptic environment due to the reduction of sulfate to H2S after the corrosion reaction of SRB, the reaction of H2S with Fe2+ to form FeS and the contact of a little FeS with air to form simple substance S. The results of XRD analysis showed that in saturated CO2 environment, the corrosion products were mainly in FeCO3, Fe2O3 and Fe3O4, in the SRB environment, the corrosion products were mainly FeS, FePS3, Fe3O4, Fe2O3 and simple substance S, and in the SRB + saturated CO2 environment, only Fe diffraction peaks were detected. The electrochemical test results showed that in the three environments, the slope of cathodic Tafel was larger than that of anode Tafel, and the corrosion was controlled by cathodic reaction. The whole corrosion process was affected by CO2 corrosion, normal bacterial growth and metabolism, and the film was easy to crack and fall off. After immersion for 15 days, the polarization resistance showed the law of Rp(SRB) > Rp(SRB+saturated CO2) > Rp(CO2) corrosion and SRB corrosion affected each other. In SRB + saturated CO2 environment, the formation of the biofilm improves the adhesion of the corrosion product film, reduces the corrosive ions passing through the film, and slows down the corrosion, so the existence of SRB can obviously inhibit the CO2 corrosion of the anti-microbial corrosion pipe. |
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