Acta Phys. -Chim. Sin. ›› 2010, Vol. 26 ›› Issue (12): 3203-3211.doi: 10.3866/PKU.WHXB20101221

• ELECTROCHEMISTRY • Previous Articles     Next Articles

Corrosion Behavior of Q235 Steel in the Presence of Pseudomonas and Iron Bacteria

DUAN Ye, LI Song-Mei, DU Juan, LIU Jian-Hua   

  1. Key Laboratory of Aerospace Materials and Performance, Ministry of Education, School of Materials Science and Engineering, Beihang University, Beijing 100191, P. R. China
  • Received:2010-06-24 Revised:2010-09-20 Published:2010-12-01
  • Contact: LI Song-Mei E-mail:songmei_li@buaa.edu.cn

Abstract:

The microbiologically influenced corrosion and electrochemical behavior of Q235 steel were investigated in the presence of pseudomonas and iron bacteria using the weight loss method, electrochemical impedance spectroscopy (EIS), and surface analysis method. The results showed that the corrosion of Q235 steel was evidently prohibited in the presence of the two bacterial species. Q235 steel immersed in a mixed culture containing both pseudomonas and iron bacteria showed higher free corrosion potential, lower corrosion current density, and an increase in impedance with immersion time. Scanning electron microscopy (SEM) revealed that a significant corrosion product film formed on the surface of Q235 steel with superior homogeneity and compactness.

Key words: Microbiologically influenced corrosion, Pseudomonas, Iron bacteria, Electrochemical impedance spectroscopy, Polarization curve

MSC2000: 

  • O646