Green biocide for mitigating sulfate-reducing bacteria influenced microbial corrosion

被引：10
作者：
Vaithiyanathan, Shanthi [1 ]
Chandrasekaran, Karthikeyan [1 ,2 ]
Barik, R. C. [1 ]
机构：
[1] Cent Electrochem Res Inst, CSIR, Corros & Mat Protect Div, Karaikkudi 630006, Tamil Nadu, India
[2] Cent Electrochem Res Inst, CSIR, Acad Sci & Innovat Res, Karaikkudi 630006, Tamil Nadu, India
来源：
3 BIOTECH | 2018年 / 8卷 / 12期
关键词：
Polyalthia longifolia; Sulfate-reducing bacteria; Biocide; Microbial corrosion; Transmission electron microscopy; MILD-STEEL; CARBON-STEEL; HYDROCHLORIC-ACID; IRON CORROSION; PEEL EXTRACT; INHIBITION; SURFACE;
D O I：
10.1007/s13205-018-1513-7
中图分类号：
Q81 [生物工程学（生物技术）]; Q93 [微生物学];
学科分类号：
071005 ; 0836 ; 090102 ; 100705 ;
摘要：
In the present investigation, Polyalthia longifolia plant extract (PLAE) was used as biocide to control corrosion in the presence of sulfate-reducing bacteria (SRB). Transmission electron microscopy showed the damage of SRB outer cell membrane which lead to cell destruction and disturbed membrane permeability. The scanning electron microscopy also confirmed the cell shrinkage due to green biocide, and energy-dispersive Fourier transform infra-red spectroscopy indicated the decrease in sulfide concentration in the presence of biocide. Potentiodynamic polarization of mild steel showed the lower in corrosion rate due to the decrease in cathodic reduction kinetics of SRB in the presence of biocide PLAE. The gravimetric mass loss also showed corrosion rate dropped from 0.064 millimeter per year (mm/year) to 0.013mm/year with and without biocide. The present study showed that P. longifolia extract could be a novel biocide against the growth of the SRB to control corrosion in oil and gas industries.
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页数：11
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