Study of microbial induced corrosion in carbon steel by sulfate reducing bacteria isolated from a mexican oil field separator (original) (raw)

Corrosion of carbon steels under anaerobic conditions in the presence of the sulfate-reducing bacteria (SRB) D. capillatus (DSM14982 T ) isolated from an oil field separator located in Tabasco, near of the Gulf of Mexico, has been studied. Immersion tests with two steels alloys, St-35.8 and API-5XL52 were performed. Total exposure was 45 days and different concentrations of electron acceptor were performed. Microscopic observations by scanning electron microscopy (SEM) and loss of weight measured as gcm -2 , indicated that the bacteria influenced behaviour of both materials.