Experimental study on the microstructural and anti-corrosion behaviour of Co-deposition Ni–Co–SiO2 composite coating on mild steel
| Autor: | D.I. Ekweghiariri, C.U. Atuanya, C.M. Obele |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Materials science
020209 energy Computational Mechanics 02 engineering and technology engineering.material Corrosion Coating Microstructure and coating 0202 electrical engineering electronic engineering information engineering Deposition (law) Mechanical Engineering Metallurgy Non-blocking I/O Metals and Alloys Anti-corrosion Co-deposition 021001 nanoscience & nanotechnology Microstructure Composite coating Military Science Ceramics and Composites engineering Particle size 0210 nano-technology |
| Zdroj: | Defence Technology, Vol 14, Iss 1, Pp 64-69 (2018) |
| ISSN: | 2214-9147 |
| Popis: | Mild steel is commonly used in the construction of Pipeline. The major problem of this Pipeline is corrosion. Effort is make my researchers to combat this problem. In this work Co-deposition of Ni-Co-SiO2 composite coating on mild steel was reported with the view to reduce this problem. The SiO2 was varies from 5 to 25wt% in the deposition. The microstructure, hardness values and potentiodynamic polarization in simulated sea water were determined. The results show that XRD pattern of the NiCo deposited mild steel revealed the presence hard phases of NiO, Co5Ni, Co2Ni3, NiCo5 while that of Ni-Co-SiO2 deposited mild steel revealed the presence harder phases of NiOSiO2, CoNi7Si2, Co5Ni2Si3. The NiCo-25SiO2 deposited sample has smaller particle size than Ni-10Co coating. Coating thickness of 110.7 μm was obtained for Ni-10Co coating, while coating thickness of 135.7, 157.7, 165.0 μm were obtained at Ni-10Co-xSiO2(x = 10, 15, 25wt%). 99.90% corrosion resistance was achieved at Ni-Co-25SiO2. This improvement in corrosion resistance after composites coating could be attributed to the hard and fine structure obtained after coating. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|