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Relationship between the ennoblement of passive metals and microbe adsorption kinetics in seawater

✍ Scribed by W. Wei; W. Jia; X. Haibo; L. Xiangbo

Publisher
John Wiley and Sons
Year
2005
Tongue
German
Weight
152 KB
Volume
56
Category
Article
ISSN
0947-5117

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✦ Synopsis

Abstract

The relationship between microbial colonization of two kinds of passive metals and ennobling of their corrosion potentials (E~corr~) were studied. Two types of passive metal coupons were exposed to natural seawater for about ten days. Under laboratory conditions, all corrosion potentials of the samples ennobled for about 200 mV. Epifluorescence microscopy showed that bacteria adsorption was the main process during about the first day immersion and bacteria reproduced in the following days. The bacteria number increased on the metal surface according to an exponential law and the kinetics of bacteria adsorption at the metal surface during this period was proposed. The ennoblement of E~corr~ was similar to the increasing bacteria number: E~corr~ increased quickly during the bacteria adsorption process and increased slowly after biofilms had formed.

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