Effect of Pseudomonas sp on the degradation of aluminum/epoxy coating in seawater

doi:10.1016/j.molliq.2018.04.103

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	Effect of Pseudomonas sp on the degradation of aluminum/epoxy coating in seawater
	Feng, TT ; Wu, JY ; Chai, K ; Liu, FC
刊名	JOURNAL OF MOLECULAR LIQUIDS
	2018-08-01
卷号	263 页码:248-254
关键词	Pseudomonas sp. Degradation Aluminum/epoxy coating Seawater
ISSN号	0167-7322
DOI	10.1016/j.molliq.2018.04.103
英文摘要	Polymeric coatings prevent metal materials from corrosion. Nevertheless, the degradation of the coatings in sea-water by microorganisms is almost unknown. In this work, we explored the degradation of the aluminum/epoxy coating in sterile seawater and seawater inoculated with Pseudomonas sp. by electrochemical impedance spectroscopy, scanning electron microscopy, energy dispersive spectroscopy, Fourier transform infrared spectroscopy and contact angle test. The decreases in the corrosion resistance of the coating were significantly higher in seawater inoculated with Pseudomonas sp. than in sterile seawater. The mature biofilm formed on the coating and then the extensive under-coating corrosion occurred in seawater inoculated with Pseudomonas sp.. These results revealed that Pseudomonas sp. significantly decreased the corrosion resistance of the coating and might degrade the coating. Some bulges and tiny holes were observed on the coating in seawater inoculated with Pseudomonas sp.. The contents of Al and O significantly respectively decreased and increased on the surface of the coating in seawater inoculated with Pseudomonas sp. relative to those on the surfaces of the coating without immersion and in sterile seawater. The absorbance of the C-OH peak for the coating immersed in seawater inoculated with Pseudomonas sp. was significantly higher than that for the coating without immersion and the coating immersed in sterile seawater. Moreover, Pseudomonas sp. decreased the water contact angle of the coating surfaces. The results demonstrated that Pseudomonas sp. degraded the aluminum/epoxy coating through decomposing the aluminum and oxidizing the epoxy to forming hydroxyl. (C) 2018 Elsevier B.V. All rights reserved.
学科主题	Chemistry, Physical ; Physics, Atomic, Molecular & Chemical
语种	英语
WOS记录号	WOS:000436911300029
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/80078]
专题	金属研究所_中国科学院金属研究所
作者单位	1.Hainan Univ, Mat & Chem Engn Coll, Minist Educ, Key Lab Adv Mat Trop Isl Resources, Haikou 570228, Hainan, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Key Lab Nucl Mat & Safety Assessment, Shenyang 110016, Liaoning, Peoples R China
推荐引用方式 GB/T 7714	Feng, TT,Wu, JY,Chai, K,et al. Effect of Pseudomonas sp on the degradation of aluminum/epoxy coating in seawater[J]. JOURNAL OF MOLECULAR LIQUIDS,2018,263:248-254.
APA	Feng, TT,Wu, JY,Chai, K,&Liu, FC.(2018).Effect of Pseudomonas sp on the degradation of aluminum/epoxy coating in seawater.JOURNAL OF MOLECULAR LIQUIDS,263,248-254.
MLA	Feng, TT,et al."Effect of Pseudomonas sp on the degradation of aluminum/epoxy coating in seawater".JOURNAL OF MOLECULAR LIQUIDS 263(2018):248-254.