Biocorrosion of mild steel and copper used in cooling tower water and its control
- 24 Downloads
The present study describes the biocorrosion of mild steel (MS1010) and pure copper (Cu) in cooling water environments (both field and lab study). Electrochemical and surface analyses of both metals were carried out to confirm the corrosion susceptibility in the presence of bacteria and inhibitor. Surface analysis of the MS and Cu coupons revealed that biofilm was developed with increasing exposure time in the field study. In the lab study, accumulation of extracellular polymeric substance over the metal surface was noticed and led to the severe pitting type of corrosion on both metal surfaces. Besides, the anti-corrosive study was carried out using the combinations of commercial corrosion inhibitor (S7653—10 ppm) with biocide (F5100—5 ppm), and the results reveal that the corrosion rate of MS and Cu was highly reduced to 0.0281 and 0.0021 mm/year (inhibitor system) than 0.1589 and 0.0177 mm/year (control system). Inhibition efficiency for both metals in the presence of inhibitor with biocide was found as 82 and 88% for MS and Cu, respectively. The present study concluded that MS was very susceptible to biocorrosion, compared to copper metal in cooling water environment. Further, the combination of the both inhibitor and biocide was effectively inhibiting the biocorrosion which was due to its antibacterial and anti-corrosive properties.
KeywordsBiocorrosion Cooling tower Copper Mild steel EIS SEM–EDX
Compliance with ethical standards
This article does not contain any studies with human participants or animals performed by any of the authors.
Conflict of interest
The authors declare that they have no conflict of interest in the publication.
- Baars JK (1930) Over sulfaatreductie door bacteria in. Ph.D. thesis, University of DelftGoogle Scholar
- Booth GH (ed) (1971) Microbiological corrosion, M and B monographs CE11. Mills and Boon, LondonGoogle Scholar
- Flemming HC (1996) Economical and technical overview. In: Heitz E, Lemming H-C, Sand W (eds) Microbially influenced corrosion of materials. Springer, HeidelbergGoogle Scholar
- Fontana MG (1986) Corrosion engineering. Mc-Graw Hill, New YorkGoogle Scholar
- Harrah T, Panilaitis B, Kaplan D (2004) Microbial exopolysaccharides. In: Dworkin M, Falkow S, Rosenberg E, Schleifer KH, Stackebrandt E (eds) The prokaryotes. Springer, New York, pp 88–115Google Scholar
- Kamal C, Sethuraman MG (2013) Kappaphycus alvarezii—a marine red alga as a green inhibitor for acid corrosion of mild steel. Mate Corros 64:9999Google Scholar
- NACE-RP0775 (2005) Standard recommended practice: preparation, installation, analysis, and interpretation of corrosion coupons in oilfield operations. NACE International, Houston, TXGoogle Scholar
- Obuekwe CO, Westlake DWS, Cook FD, Costerton JW (1981) Surface changes in mild steel coupons from the action of corrosion-causing bacteria. Appl Environ Microbiol 41:766Google Scholar
- Odewunmi NA, Umoren SA, Gasem ZM (2015) Utilization of watermelon rind extract as a green corrosion inhibitor for mild steel in acidic media J Ind Eng Chem 21:239–247Google Scholar
- Parthipan P, Narenkumar J, Elumalai P, Preethi PS, Nanthini AUR, Agrawal A, Rajasekar A (2017b) Neem extract as a inhibitor for microbiologically influenced corrosion of carbon steel API 5LX in a hypersaline environments. J Mol Liq 240:121–127. https://doi.org/10.1016/j.molliq.2017.05.059 CrossRefGoogle Scholar
- Ping Xu (2012) MIC in circulating cooling water system. Water Res 4:203–206Google Scholar
- Rajasekar A, Ting YP (2014) Characterization of corrosive bacterial consortia isolated from water in a cooling tower. ISRN Corros 10:1155Google Scholar
- Shaily M, Bhola A, Faisal M, Alabbas A, Rahul Bhola A, John R, Spear B, Brajendra Mishra A, David L, Olson A, Anthony E, Kakpovbia C (2014) Neem extract as an inhibitor for biocorrosion influenced by sulfate reducing bacteria: a preliminary investigation. Eng Fail Anal 36:92–103CrossRefGoogle Scholar
- Wagner P, Little B (1993) Impact of alloying on microbiologically influenced corrosion a review. Mater Perform 32:65–68Google Scholar
- Wang Z, Fan Z, Xie L, Wang S (2006) Study of integrated membrane systems for the treatment of wastewater from cooling towers. Desalination 191:117–124.Google Scholar