The formation process of biofilm of marine microorganism and the influence on the corrosion of the ship structural steel

DONG Yao-hua; HE Zhong-yi; GUO Na; LIU Tao; DONG Li-hua

doi:10.3969/j.issn.1001-909X.2015.01.006

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Journal of Marine Sciences ›› 2015, Vol. 33 ›› Issue (1) : 39-44. DOI: 10.3969/j.issn.1001-909X.2015.01.006

The formation process of biofilm of marine microorganism and the influence on the corrosion of the ship structural steel

DONG Yao-hua, HE Zhong-yi, GUO Na, LIU Tao, DONG Li-hua^*

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Abstract

In order to study the influence of the formation of biofilm on the corrosion of DH32 structural steel, the growth curve of a marine microorganism (Vibrio natriegens) was tested by UV-Vis spectra, the formation process of biofilm and the surface of the coupons were characterized by scanning electron microscope and atomic force microscope, respectively. The results show that the formation of biofilm closely associates with the growth of bacteria, the formation process of biofilm changes the chemical and physical state of the steel surface. Moreover, the formation of oxygen concentration cell and binding power of extracellular polymeric substances with metal ions greatly promotes the DH32 surface oxidation corrosion.

Key words

marine microorganism / biofilm / corrosion

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DONG Yao-hua, HE Zhong-yi, GUO Na, LIU Tao, DONG Li-hua. The formation process of biofilm of marine microorganism and the influence on the corrosion of the ship structural steel[J]. Journal of Marine Sciences. 2015, 33(1): 39-44 https://doi.org/10.3969/j.issn.1001-909X.2015.01.006

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