Electrodeposition Behavior, Physicochemical Properties and Corrosion Resistance of Ni–Co Coating Modified by Gelatin Additive
| Autor: | Boris Lakard, I. Kharmachi, P. Berçot, M. Rezrazi, L. Dhouibi |
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| Rok vydání: | 2017 |
| Předmět: |
food.ingredient
Materials science Organic Chemistry Metals and Alloys 02 engineering and technology Quartz crystal microbalance engineering.material 010402 general chemistry 021001 nanoscience & nanotechnology Microstructure 01 natural sciences Gelatin 0104 chemical sciences Surfaces Coatings and Films Corrosion Dielectric spectroscopy food Chemical engineering Coating Materials Chemistry engineering Crystallite 0210 nano-technology Electroplating |
| Zdroj: | Protection of Metals and Physical Chemistry of Surfaces. 53:1059-1069 |
| ISSN: | 2070-206X 2070-2051 |
| Popis: | The effect of gelatin on the microstructure, composition and electroplating mechanism of Ni–Co coating synthesized from sulfate media onto carbon steel substrate was investigated using AFM analysis, SEM/EDS and Electrochemical Quartz Crystal Microbalance (EQCM) coupled with chronopotentiometric measurements. The deposition of gelatin in the coating matrix was found to lower the mass of Ni–Co layers. Moreover, the adsorption of this additive seemed to inhibit the initial nucleation of the Ni–Co electrodeposition, showing homogeneous surface and smaller crystallites. Furthermore, the corrosion performance was studied in 3% NaCl solution by means of potentiodynamic polarization and electrochemical impedance spectroscopy (EIS). After a long immersion into chloride solution, Ni–Co–Gelatin (Ni–Co–Gel) coating showed a good stability and a better corrosion resistance. Therefore, the presence of gelatin additive impacted the crystal size, corrosion resistance and Ni–Co deposits morphology. |
| Databáze: | OpenAIRE |
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