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Effect of Bacillus flexus on the Degradation of Epoxy Resin Varnish Coating in Seawater
Deng, Sanxi; Wu, Jinyi; Li, Yadong; Wang, Gang; Chai, Ke; Yu, Aimin; Liu, Fuchun
2019
Source PublicationINTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE
ISSN1452-3981
Volume14Issue:1Pages:315-328
AbstractProtective coatings have been being widely applied on the surface of metallic materials to protect against corrosion. However, there is still little known about the degradation of coatings caused by microbiological attack in seawater. As one of the most widespread species, Bacillus species are of great importance in the deterioration and degradation of materials. In this paper, the effect of Bacillus flexus on the degradation of an epoxy resin varnish coating in seawater was investigated. All the experiments were conducted in either sterile seawater or seawater containing Bacillus flexus. The electrochemical characteristics of the coatings in both kinds of seawater were monitored with electrochemical impedance spectroscopy (EIS). The reduction of the corrosion resistance of the coating exposed to seawater containing Bacillus flexus between 1 day of immersion and 19 days of immersion was evidently larger when compared with that in sterile seawater, which indicated that Bacillus flexus could remarkably decrease the corrosion resistance of the coating and potentially result in degradation of the coating. In addition, scanning electron microscopy (SEM) was employed for characterizing the surface morphology of the coatings before and after immersion. After 30 days of immersion, chalking traces and some tiny holes emerged on the surface of the coatings exposed to seawater containing Bacillus flexus, which was mainly ascribed to the biofilm formed by Bacillus flexus and their metabolic activities. The results demonstrated that the epoxy resin varnish coating was degraded by Bacillus flexus, which was further confirmed by the results obtained from Fourier transform infrared spectroscopy (FTIR).
KeywordEpoxy resin varnish coating Bacillus flexus Degradation Electrochemical impedance spectroscopy Corrosion
Indexed BySCI
Language英语
WOS IDWOS:000455046500026
PublisherESG
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/81497
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
Deng, Sanxi,Wu, Jinyi,Li, Yadong,et al. Effect of Bacillus flexus on the Degradation of Epoxy Resin Varnish Coating in Seawater[J]. INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE,2019,14(1):315-328.
APA Deng, Sanxi.,Wu, Jinyi.,Li, Yadong.,Wang, Gang.,Chai, Ke.,...&Liu, Fuchun.(2019).Effect of Bacillus flexus on the Degradation of Epoxy Resin Varnish Coating in Seawater.INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE,14(1),315-328.
MLA Deng, Sanxi,et al."Effect of Bacillus flexus on the Degradation of Epoxy Resin Varnish Coating in Seawater".INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE 14.1(2019):315-328.
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