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Study on Evolution of Coating State and Role of Graphene in Graphene-Modified Low-Zinc Waterborne Epoxy Anticorrosion Coating by Electrochemical Impedance Spectroscopy
Ding, Rui1,2; Wang, Xiao1; Jiang, Jianming1; Gui, Taijiang1; Li, Weihua2
2017-07-01
Source PublicationJOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
Volume26Issue:7Pages:3319-3335
SubtypeArticle
AbstractIn this paper, corrosion potential and impedance response of the graphene-modified low-zinc waterborne epoxy anticorrosion coating with different compositions were measured experimentally. Microstructure impedance analysis approach was proposed, which was applied to analyze in detail the system impedance and to clarify the variation of coating state as well as the role of graphene in the coating. Results showed that the variation course of coating state was divided into four stages: activation stage; cathodic protection stage; shielding protection stage; and failure stage. Graphene formed numerous isolation layers in the coating to hinder the diffusion of aggressive particles like water and oxygen as well as corrosion products, which played a certain shielding protective role. Moreover, graphene was a good electron conductor, which enabled the outer layer zinc to continue to constitute a galvanic couple with the iron substrate after cathodic protection stage, thereby prolonging the protective effect of the coating to some extent.
KeywordAnticorrosion Mechanism Coating Electrochemical Impedance Graphene Zinc
DOI10.1007/s11665-017-2790-8
Indexed BySCI
Language英语
WOS IDWOS:000405659200031
Citation statistics
Document Type期刊论文
Version出版稿
Identifierhttp://ir.qdio.ac.cn/handle/337002/137069
Collection海洋环境腐蚀与与生物污损重点实验室
Affiliation1.Marine Chem Res Inst, State Key Lab Marine Coatings, Qingdao 266071, Peoples R China
2.Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China
First Author AffilicationInstitute of Oceanology, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Ding, Rui,Wang, Xiao,Jiang, Jianming,et al. Study on Evolution of Coating State and Role of Graphene in Graphene-Modified Low-Zinc Waterborne Epoxy Anticorrosion Coating by Electrochemical Impedance Spectroscopy[J]. JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE,2017,26(7):3319-3335.
APA Ding, Rui,Wang, Xiao,Jiang, Jianming,Gui, Taijiang,&Li, Weihua.(2017).Study on Evolution of Coating State and Role of Graphene in Graphene-Modified Low-Zinc Waterborne Epoxy Anticorrosion Coating by Electrochemical Impedance Spectroscopy.JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE,26(7),3319-3335.
MLA Ding, Rui,et al."Study on Evolution of Coating State and Role of Graphene in Graphene-Modified Low-Zinc Waterborne Epoxy Anticorrosion Coating by Electrochemical Impedance Spectroscopy".JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE 26.7(2017):3319-3335.
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