Review on Microbial Metal Corrosion in Fresh Water Environment and Destructor Strains

Abstract

The purpose of this study was to investigate the corrosive activity of bacterial strains isolated from two freshwater samples and their effect on fungicides against potential metal corrosive bacteria. A total of 12 strains are randomly selected according to culture characteristics and identified through various tests such as Gram staining, biochemical tests, and enzyme activity. Eight of the 12 strains are Gram-negative bacillus. Three strains are Gram-positive cocci and one strain is Gram-positive rods. All strains are Voges-Proskauer (VP) negative, 11 strains are methyl red (MR) positive and use citric acid to produce acids. In physiological studies, there were 9 strains that produced amylase, 3 strains that produced lipase, and none of the strains produced gelatinase. Corrosion-causing activity of 12 strains against low carbon steel and copper metals was performed in protein p-glucose mineral media by weightless method.