| EIS studies of water transport in epoxy coatings coated on LY12 aluminum alloys | |
| Hu, JM; Zhang, JQ; Cao, CN | |
| Corresponding Author | Zhang, JQ() |
| 2003-05-11 | |
| Source Publication | ACTA METALLURGICA SINICA
 |
| ISSN | 0412-1961 |
| Volume | 39Issue:5Pages:544-549 |
| Abstract | Electrochemical impedance spectroscopy (EIS) of LY12 aluminum alloy based epoxy coating electrodes immersed in water solution with different concentrations of NaCl was investigated. Impedance models related to different immersion stages were also proposed. According to the time dependence of coating capacitance, the water sorption in epoxy coatings is mainly controlled by Fick diffusion during the initial stage of immersion, while by non-Fick diffusion in the medium and late stages. The presence of Cl- ion leads to increase in diffusion coefficient of water, however inhibits the interaction between water molecules and coating components, that is, impedes the non-Fick diffusion process. The evaluation of impedance parameters shows electrochemical reaction impedance of metal/electrolyte interface is primarily determined by water uptake in coatings. The water sorption of coatings directly determines electrochemical reaction area of base metal/electrolyte interface. |
| Keyword | electrochemical impedance spectroscopy epoxy coating water transport aluminum alloy |
| Indexed By | SCI |
| Language | 英语 |
| WOS Research Area | Metallurgy & Metallurgical Engineering |
| WOS Subject | Metallurgy & Metallurgical Engineering |
| WOS ID | WOS:000183358400016 |
| Publisher | SCIENCE CHINA PRESS |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/117372 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Zhang, JQ |
| Affiliation | 1.Zhejiang Univ, Dept Chem, Hangzhou 310027, Peoples R China 2.Chinese Acad Sci, Inst Met Res, State Key Lab Corros & Protect, Shenyang 110016, Peoples R China |
| Recommended Citation GB/T 7714 | Hu, JM,Zhang, JQ,Cao, CN. EIS studies of water transport in epoxy coatings coated on LY12 aluminum alloys[J]. ACTA METALLURGICA SINICA,2003,39(5):544-549. |
| APA | Hu, JM,Zhang, JQ,&Cao, CN.(2003).EIS studies of water transport in epoxy coatings coated on LY12 aluminum alloys.ACTA METALLURGICA SINICA,39(5),544-549. |
| MLA | Hu, JM,et al."EIS studies of water transport in epoxy coatings coated on LY12 aluminum alloys".ACTA METALLURGICA SINICA 39.5(2003):544-549. |
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