Identification and bio-corrosion behavior of Thermoanaerobacter CF1, a thiosulfate reducing bacterium isolated from Dagang oil field

uzonensis (99.2%). The G+C content of the genomic DNA of strain CF1 was 33.5 mol%. The major cellular fatty acid contents were 14 : 0 (2.5%), 15 : 0 (65.8%), 16 : 0 (8.6%), 15-methyl 17:0 (8.1%), 14methyl 17:0 (7.4%), 18 : 1v9c (1.7%) and 18 : 0 (4.8%). The strain reduced up to 1 M thiosulfate to elemental sulfur without sulfide formation. In the presence of thiosulfate, electrochemical method, weight loss and surface analysis showed the corrosion behavior of the isolate. A slight change of corrosion current was detected through electrochemical method. Elemental sulfur was found on the surface of the carbon steel, with less weight loss in the cultivation system.