Investigating inhibition characteristics of Butea monosperma leaf extracts to retard stainless steel biocorrosion in the presence of sulfate-reducing bacteria

IF 1 4区化学 Q4 CHEMISTRY, MULTIDISCIPLINARY

Journal of The Serbian Chemical Society Pub Date : 2023-01-01 DOI:10.2298/jsc221230026m

Shiv Manu, N. Selvam, Manivannan Ramachandran

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Abstract

The influence of sulfate-reducing bacteria Desulfovibrio desulfuricans on stainless steel SS 202 corrosion in neutral media was studied in detail using weight loss and electrochemical routes. The bacterial activity resulted in material loss with an average rate of 0.015 mmpy. The scanning electron microscopy (SEM) analysis showed a significant increase in the sessile bacterial population with the immersion period. Use of 500 ppm palash (Butea monosperma) leaf extract (PLE) reduced the average corrosion rate to 0.002 mmpy. SEM analysis showed a very thin external film formation in the presence of the inhibitor. The X-ray photoelectron spectroscopy studies confirmed the presence of corrosion products such as Fe2O3 and FeS. The gas chromatography-mass spectrometry studies showed the dominant percentage of various terpenoids along with vitamin E as the main components of the PLE. Electrochemical analysis showed the existence of a diffusion barrier. The resistance offered by the diffusion barrier is high in the inhibited sample when compared to uninhibited samples.

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研究丁茶叶提取物在硫酸盐还原菌存在下对不锈钢生物腐蚀的抑制作用

采用失重法和电化学法研究了硫酸盐还原菌Desulfovibrio脱硫菌对中性介质中不锈钢SS 202腐蚀的影响。细菌活性导致材料损耗，平均速率为0.015 mmpy。扫描电镜(SEM)分析显示，随着浸泡时间的延长，固结细菌数量显著增加。使用500ppm的巴伐利亚(Butea monosperma)叶提取物(PLE)将平均腐蚀速率降低到0.002 mmpy。扫描电镜分析表明，在抑制剂的存在下，外膜形成非常薄。x射线光电子能谱研究证实了Fe2O3和FeS等腐蚀产物的存在。气相色谱-质谱分析表明，其主要成分为各种萜类化合物和维生素E。电化学分析表明扩散势垒的存在。与未受抑制的样品相比，受抑制样品中扩散屏障提供的电阻高。

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来源期刊

Journal of The Serbian Chemical Society 化学-化学综合

CiteScore

1.80

自引率

0.00%

发文量

审稿时长

1 months

期刊介绍： The Journal of the Serbian Chemical Society -JSCS (formerly Glasnik Hemijskog društva Beograd) publishes articles original papers that have not been published previously, from the fields of fundamental and applied chemistry: Theoretical Chemistry, Organic Chemistry, Biochemistry and Biotechnology, Food Chemistry, Technology and Engineering, Inorganic Chemistry, Polymers, Analytical Chemistry, Physical Chemistry, Spectroscopy, Electrochemistry, Thermodynamics, Chemical Engineering, Textile Engineering, Materials, Ceramics, Metallurgy, Geochemistry, Environmental Chemistry, History of and Education in Chemistry.