Influence of La addition on the semi-conductive properties of passive films formed on Cu-Ni alloy
| Autor: | Yadong Zhang, Bin Yang, Xiang Leng, Zhigang Wang, Yinghui Zhang, Qiongyu Zhou, Hang Wang |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Polymers and Plastics Diffusion Alloy Metals and Alloys Film resistance 02 engineering and technology engineering.material 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Corrosion Dielectric spectroscopy Biomaterials engineering Composite material 0210 nano-technology Electrical conductor Order of magnitude |
| Zdroj: | Materials Research Express. 5:056513 |
| ISSN: | 2053-1591 |
| DOI: | 10.1088/2053-1591/aac277 |
| Popis: | The semi-conductive properties of passive films formed on Cu-Ni alloy and Cu-Ni-La alloy were investigated in 0.1 M NaOH solution, by employing electrochemical impedance spectroscopy (EIS), Mott–Schottky analysis and point defect model (PDM). Results indicate that both the passive films formed on Cu-Ni alloy and Cu-Ni-La alloy display p-type semi-conductive characteristics with cation vacancies in order of magnitude of 1020 cm3. Compared with Cu-Ni alloy, La addition could significantly improve the corrosion resistance, due to a superior barrier passive film formed Cu-Ni-La alloy with a bigger film resistance (R f), increased passive film thickness (L ss) in conjunction with decreased diffusion coefficient (D 0). |
| Databáze: | OpenAIRE |
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