Influence of Static Low Electromagnetic Field on Copper Corrosion in the Presence of Multispecies Aerobic Bacteria

论文摘要

The effects of low electromagnetic field（EMF）（ B = 2 mT） on the corrosion of pure copper in the absence and presence of multispecies marine aerobic bacteria were investigated in this work. The results showed that EMF has an inhibitory effect on copper metals and decreases the corrosion rate of copper metals in sterile artificial seawater. However, microbiologically influenced corrosion of Cu was increased in the presence of electromagnetic field due to its effect on the biofilm morphology and structure. EMF reduced the growth rate of bacteria and decreased bacterial attachment, thereby forming a heterogeneous and non-stable biofilm on the Cu surface in the presence of EMF. Moreover, the biofilm was dispersed throughout the surface after 7 days, whereas the scattered bacteria were observed on the surface after 10 days. Confocal laser scanning microscopy images showed large and deep pits on the surface in the presence of EMF and confirmed the acceleration of Cu corrosion in the presence of EMF and multispecies bacteria. Furthermore, XPS and FTIR results demonstrated that the corrosion products and metabolic by-products were significantly changed in the presence of EMF.

论文目录

• 1 Introduction
• 2 Materials and Methods
• 3 Results and Discussion
•   3.1 Eff ect of EMF on the Growth Rate of Bacteria
•   3.2 Eff ect of Magnetic Field on the Biofi lm Morphology
•   3.3 Eff ect of EMF and Multispecies Bacteria on the Corrosion Process of Cu
•     3.3.1 Electrochemical Results
•     3.3.2 Surface Analysis
•   3.4 Surface Characteristics
• 4 Discussion
• 5 Conclusions

文章来源

类型: 期刊论文

作者: Xiao-Yang Wei,Masoumeh Moradi,Li-Jing Yang,Zhen-Lun Song,Bi-Zhang Zheng,Zhan-Peng Lu

来源: Acta Metallurgica Sinica(English Letters) 2019年10期

年度: 2019

分类: 工程科技Ⅰ辑

专业: 金属学及金属工艺

单位: Key Laboratory of Marine Materials and Related Technologies, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering,Chinese Academy of Sciences,School of Materials Science and Engineering,Shanghai University,Corrosion and Protection Division, Shenyang National Laboratory for Materials Science,Northeastern University

基金: supported by National Natural Science Foundation of China (No. 5161101078),Ningbo 135 Marine Economic Innovation and Development Demonstration Project (No. NBHY-2017-Z2)

分类号: TG178

页码: 1287-1297

总页数: 11

文件大小: 7981K

下载量: 4