Impact Factor 4.019
2017 JCR, Clarivate Analytics 2018

The world's most-cited Microbiology journal

Original Research ARTICLE Provisionally accepted The full-text will be published soon. Notify me

Front. Microbiol. | doi: 10.3389/fmicb.2019.01170

Corrosion Acceleration of Printed Circuit Boards with an Immersion Silver Layer Exposed to Bacillus cereus in an Aerobic Medium

Yuting Hu1,  Kui Xiao1*,  Dawei Zhang1*, Pan Yi1, Ruilin Xiong1,  Chaofang Dong1, Junsheng Wu1 and Xiaogang Li1
  • 1University of Science and Technology Beijing, China

In this research, the corrosion behavior of printed circuit boards with an immersion silver layer (PCB-ImAg) exposed to Bacillus cereus bacteria in Luria-Bertani broth was investigated. The growth test demonstrated that B. cereus had a high copper tolerance. Analysis of surface and cross-sectional view of the samples after immersion test indicated that metabolites produced by B. cereus accelerated the microporous corrosion of PCB-ImAg, and the biofilm that adhered to the surface led to oxygen concentration corrosion. Electrochemical impedance spectroscopy tests confirmed that the microbiologically influenced corrosion of PCB-ImAg was related to the biofilm formation and metabolism.

Keywords: PCB-ImAg, Corrosion acceleration, Bacillus cereus, aerobic medium, growth curve, Cross-sectional view

Received: 17 Feb 2019; Accepted: 07 May 2019.

Edited by:

Dake Xu, Northeastern University, China

Reviewed by:

Qing Qu, Yunnan University, China
Hongwei Liu, School of Chemical Engineering and Technology, Sun Yat-sen University, Zhuhai Campus, China  

Copyright: © 2019 Hu, Xiao, Zhang, Yi, Xiong, Dong, Wu and Li. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

* Correspondence:
Prof. Kui Xiao, University of Science and Technology Beijing, Beijing, 100083, Beijing Municipality, China, xiaokui@ustb.edu.cn
Prof. Dawei Zhang, University of Science and Technology Beijing, Beijing, 100083, Beijing Municipality, China, dzhang@ustb.edu.cn