Effect of nano-SiC particles on the corrosion resistance of NiP-SiC composite coatings |
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Authors: | Xue-tao Yuan Dong-bai Sun Hong-ying Yu Yu Wang |
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Institution: | a School of Materials Science and Technology, University of Science and Technology Beijing, Beijing 100083, China b Beijing Engineering-Research Center for Surface Nano-Technology, Beijing 100083, China |
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Abstract: | NiP-SiC (≈11wt% P) composite coatings were electroplated in a Brenner type plating bath. The coatings had amorphous nano-phase composite structure. Direct current and alternating current electrochemical tests were carried out on such coatings in a 3.5wt% solution of NaCl to evaluate their corrosion resistance. The potentiodynamic polarization, electrochemical impedance spectroscopy (EIS) tests, and exposure experiments all show that the corrosion resistance of NiP-SiC coatings first increases and then decreases when the SiC content increases, but the corrosion resistance of NiP-SiC composite coating is better than that of amorphous NiP coatings. |
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Keywords: | electroplating composite coating nanoparticle corrosion resistance electrochemical impedance spectroscopy |
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