Microbiologically influenced corrosion of Cu by marine ammonifying Alcaligenes aquatilis bacterium

Zhangwei Guo; Qing Ruan; Tao Liu; Xiaomin Mao; Zeyun Chai; Na Guo; Lihua Dong

doi:10.1016/j.bioelechem.2022.108052

Microbiologically influenced corrosion of Cu by marine ammonifying Alcaligenes aquatilis bacterium

Bioelectrochemistry. 2022 Jun:145:108052. doi: 10.1016/j.bioelechem.2022.108052. Epub 2022 Jan 14.

Authors

Zhangwei Guo¹, Qing Ruan², Tao Liu³, Xiaomin Mao¹, Zeyun Chai¹, Na Guo¹, Lihua Dong¹

Affiliations

¹ College of Ocean Science and Engineering, Shanghai Maritime University, Shanghai 201306, China.
² Logistics Engineering College, Shanghai Maritime University, Shanghai 201306, China.
³ College of Ocean Science and Engineering, Shanghai Maritime University, Shanghai 201306, China. Electronic address: liutao@shmtu.edu.cn.

PMID: 35065377
DOI: 10.1016/j.bioelechem.2022.108052

Abstract

In this work, we studied the microbiologically influenced corrosion mechanism of Cu by marine ammonifying bacterium Alcaligenes aquatilis. Through immersion experiments, we found that A. aquatilis could accelerate the corrosion rate of copper, resulting in the development of pits. In the presence of A. aquatilis, the morphology and composition of the corrosion products differed from the abiotic samples, and we found that Cu₂O was the main corrosion product. By analyzing the biotic medium and experimental NH₃ addition, we verified that NH₃ was the main component that intensified copper corrosion. Furthermore, we found that NH₃ played a catalytic role in the corrosion of Cu in the presence of A. aquatilis.

Keywords: A. aquatilis; Ammonifying bacterium; Cu; Microbiologically influenced corrosion; NH(3); Pitting.

MeSH terms

Alcaligenes*
Bacteria
Copper*
Corrosion

Substances

Copper

Supplementary concepts

Alcaligenes aquatilis