Effect of Bacillus flexus on the Degradation of Epoxy Resin Varnish Coating in Seawater

doi:10.20964/2019.01.64

IMR OpenIR

	Effect of Bacillus flexus on the Degradation of Epoxy Resin Varnish Coating in Seawater
	Deng, Sanxi 1; Wu, Jinyi 1; Li, Yadong 1; Wang, Gang 1; Chai, Ke 1; Yu, Aimin 2; Liu, Fuchun 3
通讯作者	Chai, Ke(chaike888@sina.com)
	2019
发表期刊	INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE
ISSN	1452-3981
卷号	14 期号:1 页码:315-328
摘要	Protective 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).
关键词	Epoxy resin varnish coating Bacillus flexus Degradation Electrochemical impedance spectroscopy Corrosion
资助者	National Natural Science Foundation of China ; Hainan Provincial Natural Science Foundation of China ; National Basic Research Program of China
DOI	10.20964/2019.01.64
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[51761011] ; National Natural Science Foundation of China[51261006] ; National Natural Science Foundation of China[51161007] ; National Natural Science Foundation of China[50761004] ; Hainan Provincial Natural Science Foundation of China[517064] ; National Basic Research Program of China[2014CB643304]
WOS研究方向	Electrochemistry
WOS类目	Electrochemistry
WOS记录号	WOS:000455046500026
出版者	ESG
引用统计	被引频次：11[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/131168
专题	中国科学院金属研究所
通讯作者	Chai, Ke
作者单位	1.Hainan Univ, Key Lab Adv Mat Trop Isl Resources, Minist Educ, Mat & Chem Engn Coll, Haikou 570228, Hainan, Peoples R China 2.Swinburne Univ Technol, Dept Chem & Biotechnol, Melbourne, Vic 3166, Australia 3.Chinese Acad Sci, Key Lab Nucl Mat & Safety Assessment, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China
推荐引用方式 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.