Impact of biofilm in the maturation process on the corrosion behavior of galvanized steel: long-term evaluation by EIS

  • Tuba UnsalEmail author
  • Nurhan Cansever
  • Esra Ilhan-Sungur
Original Paper


In this study, the effect of biofilm in the maturation process on the corrosion behavior of galvanized steel was investigated in a model of a recirculating water system over 6 months. Electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization methods were used to determine the corrosion behavior of galvanized steel. The biofilm and corrosion products on the galvanized steel surfaces were investigated by using scanning electron microscopy (SEM) and energy dispersive X-ray spectrometry (EDS). EIS results showed that the structure of the biofilm changed during the maturation process over time and the altering structure of the biofilm affects the corrosion behavior of galvanized steel. Also, EIS analyses validated that the biofilm has a dynamic and complex structure. The data obtained from SEM and macroscopic images indicated that EIS is an effective method for monitoring the biofilm-development process.


Galvanized steel Biofilm Corrosion Electrochemical impedance spectroscopy (EIS) 



This project was supported by The Scientific and Technological Research Council of Turkey (TUBITAK) [Project No:216Z133] and the ‘Scientific Research Projects Coordination Unit of Istanbul University’ [Project numbers: 33755, 28949, BEK-2016-21932, FHZ-2016-21738, BYP-2016-22742].


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© Springer Nature B.V. 2019

Authors and Affiliations

  1. 1.Faculty of Science, Department of BiologyIstanbul UniversityIstanbulTurkey
  2. 2.Faculty of Chemistry-Metallurgy, Metallurgical and Materials Engineering DepartmentYildiz Technical UniversityIstanbulTurkey

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