Three-Dimensional Structure Analysis and Percolation Properties of a Barrier Marine Coating

被引：51

作者：

Chen, Bo ^{[1
]}

Guizar-Sicairos, Manuel ^{[2
]}

Xiong, Gang ^{[1
]}

Shemilt, Laura ^{[1
]}

Diaz, Ana ^{[2
]}

Nutter, John ^{[1
]}

Burdet, Nicolas ^{[1
]}

Huo, Suguo ^{[1
]}

Mancuso, Joel ^{[3
]}

Monteith, Alexander ^{[4
]}

Vergeer, Frank ^{[5
]}

Burgess, Andrew ^{[6
]}

Robinson, Ian ^{[1
,7
]}

机构：

[1] UCL, London Ctr Nanotechnol, London WC1H 0AH, England

[2] Paul Scherrer Inst, CH-5232 Villigen, Switzerland

[3] Gatan Inc, Pleasanton, CA 94588 USA

[4] Gatan UK Ltd, Abingdon OX14 1RL, Oxon, England

[5] AkzoNobel Co Ltd, NL-2171 AJ Sassenheim, Netherlands

[6] AkzoNobel UK Co Ltd, Gateshead NE10 0JY, Tyne & Wear, England

[7] Harwell Oxford, Res Complex Harwell, Didcot OX11 0FA, Oxon, England

来源：

SCIENTIFIC REPORTS | 2013年 / 3卷

基金：

英国生物技术与生命科学研究理事会; 英国工程与自然科学研究理事会;

关键词：

RAY; RECONSTRUCTION; TOMOGRAPHY; CIRCUIT; PAPER;

D O I：

10.1038/srep01177

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

070301 [无机化学]; 070403 [天体物理学]; 070507 [自然资源与国土空间规划学]; 090105 [作物生产系统与生态工程];

摘要：

Artificially structured coatings are widely employed to minimize materials deterioration and corrosion, the annual direct cost of which is over 3% of the gross domestic product (GDP) for industrial countries. Manufacturing higher performance anticorrosive coatings is one of the most efficient approaches to reduce this loss. However, three-dimensional (3D) structure of coatings, which determines their performance, has not been investigated in detail. Here we present a quantitative nano-scale analysis of the 3D spatial structure of an anticorrosive aluminium epoxy barrier marine coating obtained by serial block-face scanning electron microscopy (SBFSEM) and ptychographic X-ray computed tomography (PXCT). We then use finite element simulations to demonstrate how percolation through this actual 3D structure impedes ion diffusion in the composite materials. We found the aluminium flakes align within 15 degrees of the coating surface in the material, causing the perpendicular diffusion resistance of the coating to be substantially higher than the pure epoxy.

引用

页数：5

共 29 条

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Calculating the permeability of model paper coating structures comprising incongruent particle shapes and sizes [J].