Preparation and Performance Evaluation of a Novel Bactericide for Sulfate Reducing Bacteria

Abstract:

The sulfate reducing bacteria (SRB) bactericide was synthesized using KNO₃, isothiazolinone, quaternary ammonium salt, and additives as main components, and the optimal ratio and critical concentration of the bactericide were determined. Weight loss method, potentiodynamic polarization curve, compatibility study were used to investigate the changes of corrosion rate and corrosion current density and compatibility after adding the bactericide. The results showed that the optimal formula ratio of the bactericide was: KNO₃: isothiazolinone: quaternary ammonium salt: additive is 20:1:2:3, and the critical concentration of the bactericide was 50 mg/L. The addition of bactericides reduced the corrosion rate of pipes by 67% to 88%, and the electrochemical corrosion current density of pipes was significantly reduced, indicating that the presence of bactericides under the given media conditions significantly slowed down the corrosion process of metals. The bactericide was used in conjunction with commonly used oilfield chemicals such as corrosion inhibitors, scale inhibitors, flocculants, without obvious changes in appearance, no reduction in efficacy. Therefore, it may be concluded that the bactericide has good compatibility.

• Periodical: Materials Science Forum (Volume 1035)
• Pages: 624-629
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.1035.624
• Online since: June 2021
• Authors: Xiao Jun Fang*, Li Liu, Zhi Gang Yang, Yong Qiang Zhang
• Keywords: Bactericide, Compatibility, Electrokinetic Polarization, Sulfate-Reducing Bacteria, Weight Loss Method

References

[1] Wu Ming, Zong Yue, Xie Fei, et al. The effect of marine sulfate-reducing bacteria on the corrosion behavior of X100 steel[J]. Journal of Materials Science and Engineering, 2017 35(6): 897-914.

[2] Zhao Jian, Xie Fei, Gong Ke, et al. Stress corrosion cracking behavior of X70 pipeline steel under the action of sulfate reducing bacteria[J]. Surface Technology, 2017 46(10): 108-114.

[3] ABEDI S S, ABDOLMALEKI A, ADIBI N. Failure analysis of SCC and SRB induced cracking of a transmission oil products pipeline[J]. Engineering Failure Analysis, 2007 14(1): 250-261.

DOI: 10.1016/j.engfailanal.2005.07.024

[4] USHER K M, KAKSONEN A H, BOUAUET D, et al. The role of bacterial communities and carbon dioxide on the corrosion of steel [J]. Corrosion Science, 2015 98: 354-365.

DOI: 10.1016/j.corsci.2015.05.043

[5] Niu Tao, Yang Jianwei, Wang Lin, et al. Corrosion perforation mechanism of X60 pipeline steel under the action of sulfate reducing bacteria[J]. Corrosion and Protection, 2014 35(10): 1060-1064.

[6] ROMERO M D, DUQUE Z, RODRIGUEZ L, et al. A study microbiologically induced corrosion by sulfate-reducing bacteria on carbon steel using hydrogen permeation[J]. Corrosion, 2005 61(1): 68-75.

DOI: 10.5006/1.3278162