| The impact-corrosion behavior of HVAF-sprayed monolayer and hierarchical Fe-based amorphous coatings | |
| Yang, Fan1,2; Wang, Debin1,2; Li, Tianrun1,2; Yang, Baijun1; Zhang, Suode1; Wang, Jianqiang1 | |
| Corresponding Author | Yang, Baijun(bjyang@imr.ac.cn) ; Wang, Jianqiang(jqwang@imr.ac.cn) |
| 2024-01-30 | |
| Source Publication | SURFACE & COATINGS TECHNOLOGY
 |
| ISSN | 0257-8972 |
| Volume | 476Pages:14 |
| Abstract | The impact-corrosion behavior of the monolayer and hierarchical Fe-based amorphous coatings (AMCs) fabricated by high velocity air fuel (HVAF) in 3.5 wt% NaCl solution were investigated in detail. The polarization results indicate with the impact energy increases, the monolayer coating exhibits a corrosion failure as evident by a distinct increment in passive current density, which is caused by the penetrated radial cracks. The radial cracks provide corrosion channels between the solution and the substrate. Differently, the hierarchical coating shows a gradual improvement in passive current density and metastable pitting frequency with the increase of impact energy. This is related to the IR drop, and the larger potential difference between inside and outside the crack results in the passive film being more susceptible to breakdown. Long-term electrochemical impedance spectroscopy results demonstrate that the hierarchical coating possess excellent resistance to impact-corrosion. Nevertheless, when the impact energy exceeds 21.6 J, a corrosion degradation occurs after 720 h. This failure is because that the cone cracks are extended with the energy increasing, causing pH drop and Cl- accumulation and oxygen deficiency inside the cracks. This work reveals the mechanism of impact-corrosion of Fe-based AMCs, and provides guidance for their engineering application. |
| Keyword | Hierarchical coating Impact energy Corrosion Polarization Impedance spectroscopy |
| Funding Organization | National Key Research and Development Program of China ; National Natural Science Foundation of China ; Key Research Program of the Chinese Academy of Sciences |
| DOI | 10.1016/j.surfcoat.2023.130225 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | National Key Research and Development Program of China[2022YFF0609002] ; National Natural Science Foundation of China[U1908219] ; National Natural Science Foundation of China[52171163] ; Key Research Program of the Chinese Academy of Sciences[ZDRW-CN-2021-2-2] |
| WOS Research Area | Materials Science ; Physics |
| WOS Subject | Materials Science, Coatings & Films ; Physics, Applied |
| WOS ID | WOS:001123733800001 |
| Publisher | ELSEVIER SCIENCE SA |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/177100 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Yang, Baijun; Wang, Jianqiang |
| Affiliation | 1.Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China |
| Recommended Citation GB/T 7714 | Yang, Fan,Wang, Debin,Li, Tianrun,et al. The impact-corrosion behavior of HVAF-sprayed monolayer and hierarchical Fe-based amorphous coatings[J]. SURFACE & COATINGS TECHNOLOGY,2024,476:14. |
| APA | Yang, Fan,Wang, Debin,Li, Tianrun,Yang, Baijun,Zhang, Suode,&Wang, Jianqiang.(2024).The impact-corrosion behavior of HVAF-sprayed monolayer and hierarchical Fe-based amorphous coatings.SURFACE & COATINGS TECHNOLOGY,476,14. |
| MLA | Yang, Fan,et al."The impact-corrosion behavior of HVAF-sprayed monolayer and hierarchical Fe-based amorphous coatings".SURFACE & COATINGS TECHNOLOGY 476(2024):14. |
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