Anti-corrosive and anti-microbial properties of nanocrystalline Ni-Ag coatings
| Autor: | Chandan Srivastava, K.A. Natarajan, Y. Raghupathy |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Materials science
Galvanic coupling Mechanical Engineering Metallurgy Materials Engineering (formerly Metallurgy) Substrate (chemistry) 02 engineering and technology engineering.material 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Antimicrobial 01 natural sciences Nanocrystalline material 0104 chemical sciences Corrosion Coating Mechanics of Materials engineering General Materials Science Sulfate-reducing bacteria 0210 nano-technology Nuclear chemistry Solid solution |
| Zdroj: | Materials Science and Engineering: B. 206:1-8 |
| ISSN: | 0921-5107 |
| DOI: | 10.1016/j.mseb.2016.01.005 |
| Popis: | Anti-corrosive and anti-bacterial properties of electrodeposited nanocrystalline Ni-Ag coatings are illustrated. Pure Ni, Ni-7 at.% Ag, & Ni-14 at.% Ag coatings were electrodeposited on Cu substrate. Coating consisted of Ni-rich and Ag-rich solid solution phases. With increase in the Ag content, the corrosion resistance of the Ni-Ag coating initially increased and then decreased. The initial increase was due to the Ni-Ag solid solution. The subsequent decrease was due to the increased galvanic coupling between the Ag-rich and Ni-rich phases. For all Ag contents, the corrosion resistance of the Ni-Ag coating was higher than the pure Ni coating. Exposure to Sulphate Reducing Bacteria (SRB) revealed that the extent of bio-fouling decreased with increase in the Ag content. After 2 month exposure to SRB, the Ni-Ag coatings demonstrated less loss in corrosion resistance (58% for Ni-7 at.% Ag and 20% for Ni-14 at.% Ag) when compared pure Ni coating (115%). (C) 2016 Elsevier B.V. All rights reserved. |
| Databáze: | OpenAIRE |
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