Microbiologically-enhanced galvanic corrosion of the steel beneath a deposit in simulated oilfield-produced water containing Desulfotomaculum nigrificans

被引：52

作者：

Liu, Hongwei ^{[1
,2
]}

Zhong, Xiankang ^{[3
]}

Liu, Hongfang ^{[1
]}

Cheng, Y. Frank ^{[2
]}

机构：

[1] Huazhong Univ Sci & Technol, Key Lab Large Format Battery Mat & Syst, Hubei Key Lab Mat Chem & Serv Failure, Minist Educ,Sch Chem & Chem Engn, Wuhan 430074, Hubei, Peoples R China

[2] Univ Calgary, Dept Mech & Mfg Engn, Calgary, AB T2N 1N4, Canada

[3] Southwest Petr Univ, State Key Lab Oil & Gas Reservoir Geol & Exploita, Chengdu 610500, Sichuan, Peoples R China

来源：

ELECTROCHEMISTRY COMMUNICATIONS | 2018年 / 90卷

关键词：

Microbiologically influenced corrosion; Galvanic corrosion; Under deposit corrosion; Sulfate-reducing bacteria; SULFATE-REDUCING BACTERIA; X52 PIPELINE STEEL; CARBON-STEEL; ELECTROCHEMICAL CORROSION; MECHANISM; INHIBITION; ELECTRODE; DROP; SOIL;

D O I：

10.1016/j.elecom.2018.03.001

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

In this work, microbiologically-enhanced galvanic corrosion between the carbon steel beneath a deposit and bare on steel was investigated in simulated oilfield-produced water containing sulfate-reducing bacteria (SRB), in this case Desulfotomaculum nigrificans. The results show that the SRB enhance the generation of a galvanic coupling effect between bare steel and the steel under the deposit, due to their different electrochemical potentials, resulting in accelerated corrosion of the steel under the deposit. In this galvanic couple the bare steel serves as the cathode and the steel under the deposit as the anode. As time increases, the bare steel also suffers from SRB-induced microbiologically influenced corrosion. The galvanic effect is reduced after a long period of incubation due to decreasing SRB activity. Moreover, in the presence of SRB the localized corrosion initiated on the steel under the deposit is greater than that occurring on bare steel.

引用

页码：1 / 5

页数：5

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