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, vol.25, pp.63-70, 2012 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 25
  • Publication Date: 2012
  • Doi Number: 10.1016/j.engfailanal.2012.04.007
  • Journal Name: ENGINEERING FAILURE ANALYSIS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.63-70
  • Keywords: Failure analysis, Microbially, Influenced Corrosion (MIC), Nickel-copper alloy coatings, QCM, SEM, STEEL, ELECTRODEPOSITION, IDENTIFICATION, RESISTANCE, BIOFILM, SURFACE, EQCM
  • Ankara Haci Bayram Veli University Affiliated: No

Abstract

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.