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The role of surface morphology in the barrier properties of epoxy coatings in different corrosion environments
Qian, Hongchang; Zhang, Dawei; Deng, Leping; Huang, Luyao; Xu, Dake; Du, Cuiwei; Li, Xiaogang; Zhang, DW; Xu, DK (reprint author), Univ Sci & Technol Beijing, Ctr Corros & Protect, Beijing 100083, Peoples R China.
2017-03-01
Source PublicationPROGRESS IN ORGANIC COATINGS
ISSN0300-9440
Volume104Pages:199-209
AbstractHydrophobic epoxy coatings with particulated surfaces were prepared via soft lithography using different abrasive papers as the templates. With the increasing surface roughness, the hydrophobicity of these surfaces first increased and then decreased and a maximum water contact angle of similar to 136 degrees was obtained by using a P2000 abrasive paper as the template. Electrochemical impedance spectroscopy (EIS) was used to study the role of surface morphology in the coatings' barrier properties under wet-dry cyclic immersion and in salt-spray environments. The results demonstrated that the hydrophobicity induced by the trapped air in the surface microstructures produced stronger-barrier properties than that produced by a smooth coating when exposed to wet-dry cyclic immersion. The strongest barrier performance was achieved by the coating templated with the P2000 abrasive paper, However, these microstructured hydrophobic coatings deteriorated faster in the salt-spray tests because of the direct deposition of salt electrolyte particles on the coating surfaces and the increased coating surface area. Under the salt spray condition, the coating obtained from P6000 abrasive paper exhibited the fastest deterioration. (C) 2016 Elsevier B.V. All rights reserved.; Hydrophobic epoxy coatings with particulated surfaces were prepared via soft lithography using different abrasive papers as the templates. With the increasing surface roughness, the hydrophobicity of these surfaces first increased and then decreased and a maximum water contact angle of similar to 136 degrees was obtained by using a P2000 abrasive paper as the template. Electrochemical impedance spectroscopy (EIS) was used to study the role of surface morphology in the coatings' barrier properties under wet-dry cyclic immersion and in salt-spray environments. The results demonstrated that the hydrophobicity induced by the trapped air in the surface microstructures produced stronger-barrier properties than that produced by a smooth coating when exposed to wet-dry cyclic immersion. The strongest barrier performance was achieved by the coating templated with the P2000 abrasive paper, However, these microstructured hydrophobic coatings deteriorated faster in the salt-spray tests because of the direct deposition of salt electrolyte particles on the coating surfaces and the increased coating surface area. Under the salt spray condition, the coating obtained from P6000 abrasive paper exhibited the fastest deterioration. (C) 2016 Elsevier B.V. All rights reserved.
description.department[qian, hongchang ; zhang, dawei ; deng, leping ; huang, luyao ; xu, dake ; du, cuiwei ; li, xiaogang] univ sci & technol beijing, ctr corros & protect, beijing 100083, peoples r china ; [xu, dake] chinese acad sci, inst met res, shenyang 110016, peoples r china
KeywordOrganic Coatings Corrosion Eis Hydrophobicity Interfaces
Subject AreaChemistry, Applied ; Materials Science, Coatings & Films
Funding OrganizationNational Natural Science Foundation of China [51401018]; Fundamental Research Funds for the Central Universities [FRF-TP-15-054A2]; National Basic Research Program of China (973 Program) [2014CB643300]; Open Fund of Key Laboratory of Marine Environmental Corrosion and Bio-fouling, Institute of Oceanology, Chinese Academy of Sciences [MCKF201609]
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/78266
Collection中国科学院金属研究所
Corresponding AuthorZhang, DW; Xu, DK (reprint author), Univ Sci & Technol Beijing, Ctr Corros & Protect, Beijing 100083, Peoples R China.
Recommended Citation
GB/T 7714
Qian, Hongchang,Zhang, Dawei,Deng, Leping,et al. The role of surface morphology in the barrier properties of epoxy coatings in different corrosion environments[J]. PROGRESS IN ORGANIC COATINGS,2017,104:199-209.
APA Qian, Hongchang.,Zhang, Dawei.,Deng, Leping.,Huang, Luyao.,Xu, Dake.,...&Xu, DK .(2017).The role of surface morphology in the barrier properties of epoxy coatings in different corrosion environments.PROGRESS IN ORGANIC COATINGS,104,199-209.
MLA Qian, Hongchang,et al."The role of surface morphology in the barrier properties of epoxy coatings in different corrosion environments".PROGRESS IN ORGANIC COATINGS 104(2017):199-209.
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