Corrosion effect of Bacillus cereus on X80 pipeline steel in a Beijing soil environment

Hongxia Wan; Dongdong Song; Dawei Zhang; Cuiwei Du; Dake Xu; Zhiyong Liu; De Ding; Xiaogang Li

doi:10.1016/j.bioelechem.2017.12.011

Corrosion effect of Bacillus cereus on X80 pipeline steel in a Beijing soil environment

Bioelectrochemistry. 2018 Jun:121:18-26. doi: 10.1016/j.bioelechem.2017.12.011. Epub 2017 Dec 24.

Authors

Hongxia Wan¹, Dongdong Song², Dawei Zhang¹, Cuiwei Du³, Dake Xu¹, Zhiyong Liu¹, De Ding⁴, Xiaogang Li⁵

Affiliations

¹ Corrosion and Protection Center, University of Science and Technology Beijing, Beijing 100083, China.
² Institute of Advanced Wear & Corrosion Resistant and Functional Materials, Jinan University, Guangzhou 510632, China. Electronic address: songdongdong@jnu.edu.cn.
³ Corrosion and Protection Center, University of Science and Technology Beijing, Beijing 100083, China. Electronic address: dcw@ustb.edu.cn.
⁴ Shaanxi Electric Power Research Institute, State Grid Corporation of China, Xi'an 710048, Shaanxi, China.
⁵ Corrosion and Protection Center, University of Science and Technology Beijing, Beijing 100083, China; Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, Zhejiang, China.

PMID: 29329018
DOI: 10.1016/j.bioelechem.2017.12.011

Abstract

The corrosion of X80 pipeline steel in the presence of Bacillus cereus (B. cereus) was studied through electrochemical and surface analyses and live/dead staining. Scanning electron microscopy and live/dead straining results showed that a number of B. cereus adhered to the X80 steel. Electrochemical impedance spectroscopy showed that B. cereus could accelerate the corrosion of X80 steel. In addition, surface morphology observations indicated that B. cereus could accelerate pitting corrosion in X80 steel. The depth of the largest pits due to B. cereus was approximately 11.23μm. Many pits were found on the U-shaped bents and cracks formed under stress after 60days of immersion in the presence of B. cereus. These indicate that pitting corrosion can be accelerated by B. cereus. X-ray photoelectron spectroscopy results revealed that NH₄⁺ existed on the surface of X80 steel. B. cereus is a type of nitrate-reducing bacteria and hence the corrosion mechanism of B. cereus may involve nitrate reduction on the X80 steel.

Keywords: Bacillus cereus; Biofilm; NRB; Pitting; X80 pipeline steel.

MeSH terms

Bacillus cereus / isolation & purification
Bacillus cereus / physiology*
Bacterial Adhesion
Beijing
Biofilms* / growth & development
Corrosion
Nitrates / metabolism
Oil and Gas Industry
Oxidation-Reduction
Soil Microbiology*
Steel / chemistry*

Substances

Nitrates
Steel