Corrosion mechanism of CuAl-NiC abradable seal coating system—The influence of porosity, multiphase, and multilayer structure on the corrosion failure
| Autor: | Meijiang Meng, Demian I. Njoku, Ying Li, Yingjie Yu, Ni Yumeng, Jinshan Pan, Fan Zhang |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
Polymers and Plastics Mechanical Engineering Metals and Alloys 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry 01 natural sciences Seal (mechanical) Chloride 0104 chemical sciences Corrosion Galvanic corrosion Mechanics of Materials Materials Chemistry Ceramics and Composites medicine Interphase Composite material 0210 nano-technology Porosity Layer (electronics) medicine.drug |
| Zdroj: | Journal of Materials Science & Technology. 88:258-269 |
| ISSN: | 1005-0302 |
| Popis: | In this study, the corrosion behavior of the CuAl-NiC abradable seal coating system in chloride solution was investigated to systematically research the effect of porosity, multiphase, and multilayer structure on the corrosion failure. Through the composition and structure analysis, the corrosion process of the system was predicted and then verified with mercury intrusion porosimetry, cross-section SEM/EDS analysis, and electrochemical measurements. The results demonstrated that the interphase selective corrosion caused the porosity of the top layer to decrease first and then increase during the corrosion development. The interlayer galvanic corrosion, determined by the pore connectivity, is crucial for corrosion failure. |
| Databáze: | OpenAIRE |
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