Electrodeposition of high phosphorus Ni–P alloys in emulsified supercritical CO2 baths |
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| Affiliation: | 1. Division of Materials Science and Engineering, Inha University, Incheon, 402-751, Korea;2. R&D Center, Dong Yang Piston Co. Ltd, Ansan, 425-120, Korea;1. Institute of Process Machinery and Systems Engineering, Friedrich-Alexander-Universität Erlangen-Nürnberg, Cauerstr. 4, 91052 Erlangen, Germany;2. Erlangen Graduate School in Advanced Optical Technologies (SAOT), Friedrich-Alexander Universitaet Erlangen-Nuernberg, Paul-Gordan-Straße 6, 91052 Erlangen, Germany;1. Yuzuncu Yil University, Faculty of Education, Department of Chemistry, Zeve Campus, 65080, Van, Turkey |
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| Abstract: | The use of an emulsified supercritical CO2 (sc-CO2) bath for electrodeposition of Ni–P alloys was attempted. The material characteristics of the deposits with various P contents, formed by varying the electrolyte composition and deposition current density, were investigated by means of scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), and X-ray diffraction (XRD) for surface morphology and chemical composition and crystal structure analyses. The experimental results showed that the presence of sc-CO2 in the electrodeposition bath could substantially improve the microhardness and the corrosion performance of the as-deposited Ni–P coatings. The roles of phosphorus and carbon in modifying the material properties of the deposits are discussed in detail. |
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| Keywords: | Electrodeposition Ni–P coating Microhardness Corrosion resistance |
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