Microbiologically influenced corrosion failure analysis of nickel-copper alloy coatings by Aeromonas salmonicida and Delftia acidovorans bacterium isolated from pipe system

San N. O., NAZIR H., Donmez G.

ENGINEERING FAILURE ANALYSIS, cilt.25, ss.63-70, 2012 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 25
  • Basım Tarihi: 2012
  • Doi Numarası: 10.1016/j.engfailanal.2012.04.007
  • Dergi Adı: ENGINEERING FAILURE ANALYSIS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.63-70
  • Anahtar Kelimeler: Failure analysis, Microbially, Influenced Corrosion (MIC), Nickel-copper alloy coatings, QCM, SEM, STEEL, ELECTRODEPOSITION, IDENTIFICATION, RESISTANCE, BIOFILM, SURFACE, EQCM
  • Ankara Üniversitesi Adresli: Evet

Özet

The corrosion failure analysis of Ni-Cu alloy coatings in Nutrient Broth medium and in the presence of two bacteria: Aeromonas salmonicida and Delftia acidovorans, isolated from water pipe system, has been studied using electrochemical techniques. According to EIS data, the low Rct values of Ni-Cu alloy coatings after bacteria incubation indicated that the metabolic products maybe accelerate corrosion. In addition the pH values of the medium did not change throughout the experiment: however, after immersion the pH value decreased for two bacteria and caused corrosion. These situations were verified with creviced corrosion with SEM analysis. (C) 2012 Elsevier Ltd. All rights reserved.