Microbially influenced corrosion and inhibition of nickel-zinc and nickel-copper coatings by Pseudomonas aeruginosa


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

CORROSION SCIENCE, vol.79, pp.177-183, 2014 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 79
  • Publication Date: 2014
  • Doi Number: 10.1016/j.corsci.2013.11.004
  • Title of Journal : CORROSION SCIENCE
  • Page Numbers: pp.177-183
  • Keywords: Alloy, Nickel, EIS, Microbiological corrosion, MICROBIOLOGICALLY INFLUENCED CORROSION, IMPEDANCE SPECTROSCOPY EIS, SULFATE-REDUCING BACTERIA, STAINLESS-STEEL, LOCALIZED CORROSION, ALLOY COATINGS, MILD-STEEL, BIOFILM, RESISTANCE, FILM

Abstract

The present study describes the effect of Pseudomonas aeruginosa on the corrosion rate of nickel-zinc and nickel-copper alloy coatings. The presence of bacteria was associated with decreases in R-ct values, suggesting that P. aeruginosa promoted the corrosion of nickel-copper alloy coatings. However, R-ct values of nickel-zinc coatings increased in response to bacterial inoculation, corresponding to a decrease in corrosion rate for nickel-zinc alloy coatings. Our results suggest that the activity of P. aeruginosa facilitated the corrosion of nickel-copper alloy, while serving a protective function for the nickel-zinc alloy. (C) 2013 Elsevier Ltd. All rights reserved.