Effect of N2H4 on Electrodeposition of Ni-Graphene Composite Coatings and their Corrosion Resistance Property
| Autor: | Qun Ji Xue, Xue Dong Wu, Quan Yao Yu, Ying Xin Zhang, Zhi Xiang Zeng, Zhen Zhen Liu |
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| Rok vydání: | 2015 |
| Předmět: |
Materials science
Graphene Mechanical Engineering Metallurgy Composite number chemistry.chemical_element Electrolyte Condensed Matter Physics Electrochemistry Corrosion law.invention Nickel Chemical engineering chemistry Mechanics of Materials law Conversion coating General Materials Science High-resolution transmission electron microscopy |
| Zdroj: | Materials Science Forum. 816:192-199 |
| ISSN: | 1662-9752 |
| DOI: | 10.4028/www.scientific.net/msf.816.192 |
| Popis: | The Ni-graphene composite coatings were prepared by electrochemical deposition method, using nickel sulfate and graphene as primary reagents. Pure Ni coatings, Ni-graphene coatings with N2H4 and Ni-graphene coatings without N2H4 were prepared from three different but similar electrolytes. The N2H4 added into the solution is for complexation with NiSO4 to settle the Ni ions. Graphene used in this work is characterized by TEM and HRTEM. The reaction of N2H4 with NiSO4 is characterized by XRD and optical graphs. The composite coatings’ morphology, structure and corrosion resistance were characterized by SEM and Potentiodynamic polarization test, respectively. The results show that well dispersed graphene–nickel coatings can be prepared with N2H4 in the electrolyte. By comparison with the situation that electrolyte without N2H4, graphene agglomerated at the surface of nickel coatings. The grain of the coatings prepared with and without N2H4 shows similar sizes. Ni-graphene coatings exhibit poor anticorrosion property by comparison with pure Ni coatings because of the defects (cracks and roughness on composite coatings with and without N2H4 in the solution, respectively) on the surface of graphene nickel coatings. These results provide a basis viewpoint for the further research of graphene-metallic composite coatings’ anticorrosion effect. |
| Databáze: | OpenAIRE |
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