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Structure and Transport in Coatings from Multiscale Computed Tomography of Coatings-New Perspectives for Eelectrochemical Impedance Spectroscopy Modeling?
Hughes, AE; Trinchi, A; Chen, FF; Yang, YS; Sellaiyan, S; Carr, J; Lee, PD; Thompson, GE; Xiao, TQ; Hughes, AE (reprint author), Deakin Univ, Inst Frontier Mat, Geelong, Vic 3217, Australia.; Hughes, AE (reprint author), CSIRO Minerals Resources, Clayton, Vic 3169, Australia.
2016
Source PublicationELECTROCHIMICA ACTA
ISSN0013-4686
Volume202Issue:-Pages:243—252
Subtype期刊文献
AbstractComputed Tomography (CT) is an approach that has been extensively applied in many areas of science from understanding structures in living organisms to materials science. In materials science, the study of structures within coatings presents challenges on at least two different levels. First, the structure of the coatings needs to be understood from the atomic scale, where dissolution reactions begin, up to length scales which cover the aggregation of inhibitors and other additives, which take place at similar to 10(-5) m, i.e. 4 to 5 orders of magnitude. CT is a favourable imaging technique since it allows multiscale information to be obtained non-destructively down to tens of nanometres. In this study X-ray absorption contrast imaging has been used to examine structures created using strontium chromate (SrCrO4) particles embedded in an epoxy film. It has been found that SrCrO4 particles can form clusters that extend a few hundred microns in the plane of the film, span the thickness of the film and have fractal characteristics. There are also volumes of low density epoxy of similar sizes and characteristics to the SrCrO4 clusters. The SrCrO4 clusters have a strong influence on the leaching behaviour since the release changes with time. Initially, leaching is controlled by direct dissolution but, as the clusters dissolve, the release is dominated by the fractal dimension of the cluster. The dissolved clusters leave behind voids filled with electrolyte that provide alternative transport pathways for corrosive ions through the polymer. In this paper, the nature of these clusters will be reviewed and the implication for transport properties and electrochemical assessment will be explored. Crown Copyright (C) 2015 Published by Elsevier Ltd. All rights reserved.
KeywordRadioactive Paraffin Waste Organic Coatings Aluminum-alloys Corrosion Protection Filiform Corrosion Epoxy Coatings Coated Metals Water-uptake Behavior Chromate
DOI10.1016/j.electacta.2015.10.183
Indexed BySCI
Language英语
WOS IDWOS:000375134100029
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/25847
Collection中科院上海应用物理研究所2011-2018年
Corresponding AuthorHughes, AE (reprint author), Deakin Univ, Inst Frontier Mat, Geelong, Vic 3217, Australia.; Hughes, AE (reprint author), CSIRO Minerals Resources, Clayton, Vic 3169, Australia.
Recommended Citation
GB/T 7714
Hughes, AE,Trinchi, A,Chen, FF,et al. Structure and Transport in Coatings from Multiscale Computed Tomography of Coatings-New Perspectives for Eelectrochemical Impedance Spectroscopy Modeling?[J]. ELECTROCHIMICA ACTA,2016,202(-):243—252.
APA Hughes, AE.,Trinchi, A.,Chen, FF.,Yang, YS.,Sellaiyan, S.,...&Hughes, AE .(2016).Structure and Transport in Coatings from Multiscale Computed Tomography of Coatings-New Perspectives for Eelectrochemical Impedance Spectroscopy Modeling?.ELECTROCHIMICA ACTA,202(-),243—252.
MLA Hughes, AE,et al."Structure and Transport in Coatings from Multiscale Computed Tomography of Coatings-New Perspectives for Eelectrochemical Impedance Spectroscopy Modeling?".ELECTROCHIMICA ACTA 202.-(2016):243—252.
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