Influence of thermophilic bacteria on corrosion of carbon steel in hyper chloride environment

Elumalai, Punniyakotti, Parthipan, Punniyakotti, Narenkumar, Jayaraman, Sarankumar, Raja Kumaresan, and Obulisamy, Parthiba Karthikeyan (2017) Influence of thermophilic bacteria on corrosion of carbon steel in hyper chloride environment. International Journal of Environmental Research and Public Health, 11 (3). pp. 339-347.

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The present study evaluates, the oxidation behaviour of thermophilic bacteria Geobacillus thermoparaffinivorans IR2, Geobacillus stearothermophillus IR4 and Bacillus licheniformis MN6 on carbon steel API 5 LX by weight loss, electrochemical studies (impedance and polarization analysis) and surface analysis (X-ray diffraction spectroscopy). The presence of IR2, IR4 and MN6 showed highest corrosion rate (CR) of 2.51, 2.82 and 2.41 mm/year, respectively, than the abiotic control (0.95 mm/year). Whereas in the presence of biocide tetrakis (hydroxymethyl) phosphonium sulphate (THPS) inhibition of the biofilm formation was noticed on the carbon steel and thus reduced the CR of about 0.36, 0.46 and 0.42 mm/year. The electrochemical studies also revealed that higher charge transfer resistance (105 Ω cm 2 ) and solution resistance (6.99 Ω cm 2 ) in the presence of THPS due to the intact protective film on carbon steel surface. Thus, THPS is found to act as an effective candidate towards control microbial influenced corrosion by thermophilic bacteria on carbon steel API5LX in a 36% chloride environment.

Item ID: 54091
Item Type: Article (Research - C1)
ISSN: 1660-4601
Keywords: carbon steel; crude oil reservoir; microbial influenced corrosion; thermophilic bacteria; THPS
Funders: Government of India, Department of Biotechnology (GoI), GoI Science and Engineering Research Board (EEQ), GoI Department of Science and Technology (SB), University Grants Commission (UGC)
Projects and Grants: GoI re-entry fellowship BT/RLF/Re-entry/17/2012, GoI EEQ/2016/000449, GoI SB/YS/LS-40/2013, UGC MRP-MAJOR-MICRO-2013-31825
Date Deposited: 15 Jun 2018 03:00
FoR Codes: 31 BIOLOGICAL SCIENCES > 3107 Microbiology > 310701 Bacteriology @ 100%
SEO Codes: 97 EXPANDING KNOWLEDGE > 970106 Expanding Knowledge in the Biological Sciences @ 50%
97 EXPANDING KNOWLEDGE > 970103 Expanding Knowledge in the Chemical Sciences @ 50%
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