Microbiologically Influenced corrosion of Aluminum Alloy by Pseudomnas Aeruginosa Bacteria

Abstract

The aim of this paper was to study microbiologically influenced corrosion of aluminum alloy in the presence Pseudomnas aeruginosa bacteria. Control medium tap water (absence of Pseudomnas aeruginosa bacteria ) and medium with presence Pseudomnas aeruginosa bacteria used in this study. Tafel extrapolation ,weight loss method ,microstructure examination and surface roughness test were carried out to determine the microbiologically influenced corrosion behavior of aluminum alloy. Microbiological analyses, isolation and identification by using appearance factors and biochemical test for biofilm of corrosion product used in this study. Tafel extrapolation and weight loss method of aluminum alloy showed that the presence Pseudomnas aeruginosa bacteria caused corrosion and increasing corrosion current and rate of corrosion. Microstructure examination and surface roughness test showed that the presence Pseudomnas aeruginosa bacteria caused pitting corrosion. Microbiological analyses showed that biofilm are formed as micro colonies, which subsequently caused corrosion and shows the role of Pseudomnas aeruginosa bacteria in acceleration corrosion on aluminum alloy.