H2S环境中硫酸盐还原菌对碳钢点蚀行为的影响
Effect of Sulfate Reducing Bacteria on Pitting Behavior of Carbon Steel in H2S Environment
摘 要
采用API-RP38培养基培养了从油田污水中提取的硫酸盐还原菌（SRB），并观察了SRB的生长情况，采用扫描电镜（SEM）观察了试样表面SRB的吸附形貌。采用失重方法和电化学方法研究了SRB在高含H2S和高矿化度条件下对碳钢的腐蚀作用。结果表明：SRB对碳钢腐蚀起到明显的加速作用，腐蚀形貌以点蚀为主。在高含H2S和矿化度的环境中，吸附在试样上的SRB可以存活，加速碳钢腐蚀。H2S环境中，在含SRB条件下，随着浸泡时间的延长，试样的自腐蚀电位下降，腐蚀电流密度上升，腐蚀产物膜阻抗及电荷转移阻抗均减小，腐蚀加速；在灭菌条件下，随着浸泡时间的延长，试样的自腐蚀电位增加，腐蚀电流密度减小，腐蚀产物膜阻抗及电荷转移阻抗增加，腐蚀减缓。
硫酸盐还原菌
碳钢
点蚀
电化学
H2S
sulfate reducing bacteria
carbon steel
pitting
electrochemistry
Abstract
API-RP38 culture medium was used to culture sulfate-reducing bacteria (SRB) extracted from oil field wastewater, and the growth of SRB was observed. The adsorption morphology of SRB on the surface of samples was observed by scanning electron microscopy (SEM). Weight loss method and electrochemical method were used to study the effects of SRB on corrosion of carbon steel under the conditions of high H2S and high salinity. The results showed that SRB had a significant acceleration effect on the corrosion of carbon steel, and the corrosion morphology was mainly pitting. In the environments with high H2S and salinity, SRB adsorbed on the sample could survive and accelerate the corrosion of carbon steel. In H2S environment, under the condition of containing SRB, the corrosion potential of the sample decreased with the increase of the immersion time, the corrosion current density increased, the corrosion product film resistance and the charge transfer resistance both decreased, and the corrosion accelerated. Under sterilizing conditions, as the immersion time was prolonged, the corrosion potential of the sample increased, the corrosion current density decreased, the resistance of the corrosion product film and the charge transfer resistance increased, and the corrosion slowed down.
中图分类号 TG174 DOI 10.11973/fsyfh-201807014
所属栏目 应用技术
基金项目
收稿日期 2016/12/29
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联系人作者马磊(790307645@qq,com)
引用该论文: MA Lei,XIE Junfeng,XIONG Maoxian,LI Yan,ZHAO Mifeng,WANG Hua. Effect of Sulfate Reducing Bacteria on Pitting Behavior of Carbon Steel in H2S Environment[J]. Corrosion & Protection, 2018, 39(7): 555
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参考文献
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【2】SCHINK B. Fermentation of tartrate enantiomers by anaerobic bacteria,and description of two new species of strict anaerobes,ruminococcus pasteurii,and Ilyobacter tartaricus[J]. Archives of Microbiology,1984,139(4):409-414.
【3】CROMBIE D J,MOODY G J,THONAS J D R. Corrosion of iron by sulfate-reducing bacteria[J]. ChemInform,1980,11(38):no-no.
【4】RÈGE H V,SAND W. Evaluation of biocide efficacy by microcalorimetric determination of microbial activity in biofilms[J]. Journal of Microbiological Methods,1998,33(3):227-235.
【5】MIRANDA E,BETHENCOURT M,BOTANA F J,et al. Biocorrosion of carbon steel alloys by an hydrogenotrophic sulfate-reducing bacterium desulfovibrio capillatus,isolated from a Mexican oil field separator[J]. Corrosion Science,2006,48(9):2417-2431.
【6】POSTGATE J R. The sulphate-reducing bacteria[J]. The Quarterly Review of Biology,1980,19(4):55-55.
【7】KING R A,MILLER J D A,SMITH J S. Corrosion of mild steel by iron sulphides[J]. British Corrosion Journal,1973,8(3):137-141.
【8】FRANKLIN M J,WHITE D C,ISAACS H S. Pitting corrosion by bacteria on carbon steel,determined by the scanning vibrating electrode technique[J]. Corrosion Science,1991,32(9):945-952.
【9】FONTANA M G,STAEHLE R W. Advances in corrosion science and technology[M]. Manhattan:Plenum Press,1970.
【10】KVHR C A H V W. Unity of anaerobic and aerobic iron corrosion process in the soil[J]. Corrosion,1961,17(6):119-125.
【11】VENZLAFF H,ENNING D,SRINIVASAN J,et al. Accelerated cathodic reaction in microbial corrosion of iron due to direct electron uptake by sulfate-reducing bacteria[J]. Corrosion Science,2012,66(1):88-96.
【12】俞敦义,彭芳明. 环境对硫酸盐还原菌生长的影响[J]. 材料保护,1996(2):1-2.
【13】山丹,马放,王晨. 生态因子对油田注水系统中硫酸盐还原菌生长的影响[J]. 东北石油大学学报,2007,31(1):51-54.
【14】EASHWAR M,SUBRAMANIAN G,CHANDRASEKARAN P,et al. Probing microbiologically influenced corrosion of steel during putrefaction of seawater[C]//Corrosion/90-Nace International Conference and Corrosion Sho,[S.l.]:[s.n.],1990.
【15】易绍金,张晓林. 硫酸盐还原菌新型测试瓶的研制[J]. 石油天然气学报,1996(b):90-93.
【16】GAWEL L J,NG T,ODOM J M,et al. Sulfate reducing bacteria determination and control:EP,US4999286[P]. 1991.
【17】YOUNG C C. Bergey's manual of determinative bacteriology[M]. Philadelphia Loppincott Williams & Wilkins,1994:520-521.
【18】KING R A,MILLER J D A,SMITH J S. Corrosion of mild steel by iron sulphides[J]. British Corrosion Journal,1973,8(3):137-141.
【19】王田丽,刘宏芳,韩霞. 油田注水管道固着菌检测及控制技术[J]. 油气田环境保护,2014,24(4):8-11.
【20】LIN C J,DUH J G. Mechanical characteristics of colored film on stainless steel by the current pulse method[J]. Thin Solid Films,1996,287(1/2):80-86.
【21】匡飞,王佳,张盾,等. 硫酸盐还原菌的生长过程及其对D36钢海水腐蚀行为的影响[J]. 材料开发与应用,2008,23(3):49-52.
【22】RINGAS C,ROBINSON F P A. Corrosion of stainless steel by sulfate-reducing bacteria-total immersion test results[J]. Corrosion,1988,44(9):671-678.
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