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Corrosion resistance of inorganic zinc-rich coating reinforced by Ni-coated coal fly ash
Cheng, Lihong1,2; Luo, Yang2; Ma, Shuhua2; Guo, Weihong1; Wang, Xiaohui2
2019-05-25
Source PublicationJOURNAL OF ALLOYS AND COMPOUNDS
ISSN0925-8388
Volume786Pages:791-797
AbstractTo recycle the solid waste coal fly ash (CFA), a new approach of adding Ni-coated coal fly ash (Ni-CFA) to waterborne inorganic zinc-rich coatings (ZRCs) was proposed. The effect of Ni-CFA on the corrosion resistance of ZRCs was investigated systematically using open-circuit potential (OCP) measurements, the DC polarization technique and electrochemical impedance spectroscopy (EIS). The results showed that the addition of 6.6 wt% Ni-CFA noticeably improved the cathodic protection of the coating due to the electrical conductivity of the Ni layer and decreased the corrosion current when providing barrier protection. Meanwhile, the active SiO2 on the surface of CFA was found to increase the degree of cross-linking of the potassium silicate, resulting in better mechanical properties of the coating, as measured using a bending test. Three corrosion stages were observed, with equivalent circuits expressed by R(QR), R(Q(R(QR)))(QR) and R(Q(RW)). (C) 2019 Elsevier B.V. All rights reserved.
KeywordZinc-rich coating Coal fly ash Anticorrosion Ni
DOI10.1016/j.jallcom.2019.01.368
Language英语
WOS KeywordNANOCOMPOSITE COATINGS ; PROTECTION ; PERFORMANCE ; MECHANISM ; STEEL
WOS Research AreaChemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectChemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000461778600095
PublisherELSEVIER SCIENCE SA
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/28188
Collection中国科学院过程工程研究所
Corresponding AuthorMa, Shuhua; Guo, Weihong
Affiliation1.East China Univ Sci & Technol, Sch Mat Sci & Engn, Key Lab Preparat & Applicat Ultrafine Mat, Polymer Proc Lab,Minist Educ, Shanghai 200237, Peoples R China
2.Chinese Acad Sci, Inst Proc Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Key Lab Green Proc & Engn, Beijing, Peoples R China
Recommended Citation
GB/T 7714
Cheng, Lihong,Luo, Yang,Ma, Shuhua,et al. Corrosion resistance of inorganic zinc-rich coating reinforced by Ni-coated coal fly ash[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2019,786:791-797.
APA Cheng, Lihong,Luo, Yang,Ma, Shuhua,Guo, Weihong,&Wang, Xiaohui.(2019).Corrosion resistance of inorganic zinc-rich coating reinforced by Ni-coated coal fly ash.JOURNAL OF ALLOYS AND COMPOUNDS,786,791-797.
MLA Cheng, Lihong,et al."Corrosion resistance of inorganic zinc-rich coating reinforced by Ni-coated coal fly ash".JOURNAL OF ALLOYS AND COMPOUNDS 786(2019):791-797.
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