Corrosion Behaviour of Carbon Steel in Sea Water Medium in Presence of P. aeruginosa Bacteria

被引：0
作者：
E. Hamzah
M. F. Hussain
Z. Ibrahim
A. Abdolahi
机构：
[1] Universiti Teknologi Malaysia,Faculty of Mechanical Engineering
[2] Universiti Teknologi Malaysia,Faculty of Biosciences and Medical Engineering
来源：
Arabian Journal for Science and Engineering | 2014年 / 39卷
关键词：
Carbon steel; Microbially influenced corrosion; Bacterium ; Biofilm; Corrosion product; Corrosion rate;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The present paper aims to investigate on corrosion behaviour of carbon steel in the nutrient-rich simulated sea water medium in presence of Pseudomonas aeruginosa bacteria. Different techniques such as scanning electron microscopy (SEM), visual inspection, X-ray diffraction (XRD) and weight loss measurement were used to characterize the corrosion products and biofilm layer. The SEM results show the formation of filamentous heterogeneous biofilm layer on the steel substrate due to presence of P. aeruginosa bacteria in a medium. The visual inspection preliminary results show the more severe corrosion damages occurred on the steel substrate exposed to bacteria-contained medium compared with the steel substrate immersed in the sterile medium. The weight loss results show that the corrosion rate of steel substrates in bacteria-contained medium was around 1.6 times higher than corrosion rate of steel substrates in sterile medium indicating the aggressive role of bacteria on corrosion acceleration. XRD results show that the corrosion products are composed of FeOOH, FeO, Fe3O4 and FeO ·Fe2O3 due to metabolism activity of the bacteria. From the present study, it is inferred that bacterium. P. aeruginosa is responsible for severe corrosion of steel substrate in the sea water medium.
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页码：6863 / 6870
页数：7
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