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Influence of sulfate reducing bacteria on the cupronickel corrosion

Liu Kecheng (Hebei Electric Power Research Institute, Shijiazhuang, China)
Liu Xia (State Nuclear Electric Power Planning Design and Research Institute, Beijing, China)
Long Xiao (Hebei Electric Power Research Institute, Shijiazhuang, China)
Wei Jiaqiang (Power and Mechanical Engineering College, Wuhan University, Wuhan, China)
Hu Mengsha (Power and Mechanical Engineering College, Wuhan University, Wuhan, China)
Zhou Baiqing (Power and Mechanical Engineering College, Wuhan University, Wuhan, China)

Anti-Corrosion Methods and Materials

ISSN: 0003-5599

Article publication date: 28 October 2014

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Abstract

Purpose

The purpose of this study is to explore the influence of the sulfate reducing bacteria (SRB) on the corrosion of cupronickel.

Design/methodology/approach

Tests monitoring the change in free corrosion potential, linear polarization resistance and electrochemical impedance spectroscopy and examination using the scanning electron microscope and energy spectrum analysis were used to investigate the corrosion behavior of cupronickel in blank medium and in media inoculated with SRB to explore the influence of the SRB on the corrosion behavior of cupronickel alloy.

Findings

The results show that SRB can destroy the surface oxide film of cupronickel and significantly reduce the free corrosion potential and polarization resistance of the cupronickel, causing the cupronickel to corrode significantly.

Originality/value

SRB are widely found in the water supply system and is one of the important factors inducing microbial corrosion. This paper verified that SRB promote cupronickel corrosion and explored the influence and mechanism of attack.

Keywords

Citation

Kecheng, L., Xia, L., Xiao, L., Jiaqiang, W., Mengsha, H. and Baiqing, Z. (2014), "Influence of sulfate reducing bacteria on the cupronickel corrosion", Anti-Corrosion Methods and Materials, Vol. 61 No. 6, pp. 395-401. https://doi.org/10.1108/ACMM-07-2013-1288

Publisher

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Emerald Group Publishing Limited

Copyright © 2014, Emerald Group Publishing Limited