Monitoring of corrosion of Aeromonas eucrenohila in the first steps of biofilm formation on nickel

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Tabnzi A., NAZIR H., San N., DÖNMEZ G.

Journal of Engineering and Applied Sciences, cilt.7, sa.5, ss.372-378, 2012 (Scopus) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 7 Sayı: 5
  • Basım Tarihi: 2012
  • Doi Numarası: 10.3923/jeasci.2012.372.378
  • Dergi Adı: Journal of Engineering and Applied Sciences
  • Derginin Tarandığı İndeksler: Scopus
  • Sayfa Sayıları: ss.372-378
  • Anahtar Kelimeler: EIS, FTIR, Microbiological corrosion, Nickel coatings, Polarization, SEM
  • Ankara Üniversitesi Adresli: Evet

Özet

The microbial corrosion behaviour of Ni in nutrient broth and in the presence of Aeromonas eucrenophila, isolated from water treatment system has been studied using electrochemical techniques such as Open Circuit Potential (OCP), Quartz Crystal Microbalance (QCM), Tafel and Electrochemical Impedance Spectroscopy (EIS). The electrochemical results declare the 1 st stage of biofilm formation of A. eucrenophila shows pseudoprotection effect while increase the time accelerates the corrosion of nickel by increasing the surface inhomogeneity. The formation of the biofilm and the roughness of the nickel surface were characterized using Scanning Electron Microscopy (SEM) with Energy Dispersive X-ray (EDX) analysis and FT-IR spectroscopy. In addition, the pH values of the medium did not change throughout the experiment, however after immersion in the medium with bacterium the pH value decreased to acidic value and caused corrosion. © Medwell Journals, 2012.