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Exopolysaccharide produced by Vibrio neocaledonicus sp as a green corrosion inhibitor: Production and structural characterization
Moradi, Masoumeh; Song, Zhenlun; Xiao, Tao
2018
发表期刊JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
卷号34期号:12页码:2447-2457
摘要An exopolysaccharide substances produced by Vibrio neocaledonicus sp. was introduced as a novel green inhibitor against the corrosion of carbon steel in artificial seawater and acidic media. The produced extracellular polymeric substance (EPS) is heterogeneous with composition of polysaccharides, nucleic acids and protein and average molecular weight of 29,572 Da. Adsorption of EPS on the metal surfaces and formation of Fe-EPS complexes acted as a barrier to prevent the oxygen penetration and hindered anodic and cathodic reactions. The inhibitory effect increases with increasing EPS concentration and exposure time. The highest corrosion inhibitory effect (95.1%) was observed for 10 g/L of EPS after 5 days of exposure in seawater. This is the highest inhibitory effect ever been reported by EPSs. While, the optimum concentration of EPS with the highest inhibition efficiency in 1 N H2SO4 was 1000 ppm. The influence of different parameters, such as initial pH, growth phase, various nitrogen and carbon sources on the production of EPS and its corrosion inhibitory effect were also investigated. According to results, the optimum culture medium for EPS production is contained artificial seawater including 5% mannitol as carbon source and 0.1% (NH4)(2)SO4 as nitrogen source at pH= 8. This medium could produce 22.24 g/L EPS during 3 days' incubation at 30 degrees C. The corrosion inhibitory efficiency of obtained EPS was 95.97%. (C) 2018 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
关键词Extracellular Polymeric Substances Microbiologically Influenced Corrosion Carbon-steel Corrosion Mild-steel Artificial Seawater Hydrochloric-acid Marine Bacterium Stainless-steel Cast-iron Eps
学科领域Chemistry ; Materials Science ; Physics
语种英语
文献类型期刊论文
条目标识符http://ir.nimte.ac.cn/handle/174433/16997
专题2018专题
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Moradi, Masoumeh,Song, Zhenlun,Xiao, Tao. Exopolysaccharide produced by Vibrio neocaledonicus sp as a green corrosion inhibitor: Production and structural characterization[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2018,34(12):2447-2457.
APA Moradi, Masoumeh,Song, Zhenlun,&Xiao, Tao.(2018).Exopolysaccharide produced by Vibrio neocaledonicus sp as a green corrosion inhibitor: Production and structural characterization.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,34(12),2447-2457.
MLA Moradi, Masoumeh,et al."Exopolysaccharide produced by Vibrio neocaledonicus sp as a green corrosion inhibitor: Production and structural characterization".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 34.12(2018):2447-2457.
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