Corrosion Behavior of Cupronickel Alloy in Simulated Seawater in the Presence of Sulfate-Reducing Bacteria

Yanyan Song^1,2，Hongwei Shi¹，Jun Wang²，Fuchun Liu¹，En-Hou Han¹，Wei Ke¹，Ganxin Jie³，Jun Wang³，Haijun Huang³

1. CAS Key Laboratory of Nuclear Materials and Safety Assessment,Institute of Metal Research,Chinese Academy of Sciences2. Department of Chemistry,Northeastern University3. State Key Laboratory of Environmental Adaptability for Industrial Products,National Electric Apparatus Research Institute Co.,Ltd

摘 要：The corrosion behavior of cupronickel alloy immersed in the simulated seawater in or without the presence of sulfate-reducing bacteria（SRB）was studied.The results of scanning electronic microscopy and electrochemical impedance spectra reveal that corrosion of the sample immersed in the simulated seawater with SRB was more serious than that immersed in the simulated seawater without SRB.The atomic force microscopy images show that after immersion for 15 days,the surface roughness of the sample in the simulated seawater with SRB was higher than that of the sample in the simulated seawater without SRB.The analysis of confocal laser scanning microscopy indicates that the average depth of the pits on the surface of the sample in the simulated seawater with SRB was almost twice deeper than that of the sample in the simulated seawater without SRB.

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