Corrosion Inhibition of X80 Steel in Simulated Marine Environment with Marinobacter aquaeolei

查看全文 作　　者：M.Saleem [1,2]Khan;Dake [3]Xu;Dan [3]Liu;Yassir [4]Lekbach;Ke [1]Yang;Chunguang [1]Yang

机构地区：[1]Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China;[2]University of Chinese Academy of Sciences,Beijing 100049,China;[3]Corrosion and Protection Division,Shenyang National Laboratory for Material Sciences,Northeastern University,Shenyang 110819,China;[4]Laboratory of Microbial Biotechnology,Faculty of Science and Technology,Sidi Mohamed Ben Abdellah University,B.P.2202,Fez,Morocco

出　　处：《Acta Metallurgica Sinica(English Letters)》索引2019年第32卷第11期,共12页

基　　金：Financial support was provided by the Shenzhen Science and Technology Research Funding (Grant No. JCY20160608153641020);the National Natural Science Foundation of China (Grant Nos. 51771199 and 51501188);the National Basic Research Program of China (Grant No. 2016YFB0300205);the State Key Program of National Natural Science of China (Grant No. 51631009) 摘　　要：In the present study, a novel bacterium( Marinobacter aquaeolei) was examined for its corrosion inhibiting behaviour against X80 pipeline steel. Electrochemical results showed that X80 steel immersed in the solution inoculated with M. aquaeolei possessed very high corrosion resistance compared to that of abiotic control. Besides, scanning electron microscopy, confocal laser scanning microscopy and energy-dispersive X-ray spectroscopy were employed to analyse the corrosion product and the biofi lm formed on the metal surface. Fourier-transform infrared spectroscopy was also applied to determine the composition of extracellular polymeric substances(EPS). Above results indicated that the corrosion inhibition effciency observed in biotic medium was very high(91%), proving that M. aquaeolei was an effective inhibitive agent for the corrosion of carbon steel. The inhibition was credited to the formation of bacterial biofi lm and the compact protective layer of the secreted EPS. Thus, this study will introduce a natural, environmentally friendly and cost-effective system for the corrosion control of the carbon steel. 关键词：X80 PIPELINE steel Corrosion INHIBITION MARINOBACTER aquaeolei

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Corrosion Inhibition of X80 Steel in Simulated Marine Environment with Marinobacter aquaeolei

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