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A study on the mechanism of electrodeposition of Ni/SiC composite coatings using impedance technique

Sohrabi, A ; Sharif University of Technology | 2012

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  1. Type of Document: Article
  2. DOI: 10.1149/1.4718390
  3. Publisher: 2012
  4. Abstract:
  5. Ni/SiC nanocomposite coatings were electrodeposited using Watts type bath and different SiC particle size. The electrodeposition behavior of Ni/SiC nanoelectrocomposites was studied using electrochemical techniques such as impedance spectroscopy (EIS) and voltammetry. In this study it was shown that SiC particles modify the EIS diagram and voltammograms as well as surface morphology of electrodeposited layers. Experimental results showed that SiC particles not only affect the formation of intermediate species and decrease charge transfer resistance but also increase the nucleation sites for nickel electrodeposition and thus affect the microstructure of electrodeposited Ni/SiC nanocomposites. Furthermore, SiC particles promote further adsorption/desorption of intermediates of nickel on the electrode surface, as shown by impedance studies
  6. Keywords:
  7. Adsorption/desorption ; Charge transfer resistance ; Electro-deposition behaviors ; Electrochemical techniques ; Impedance spectroscopy ; Impedance techniques ; Nano-composite coating ; Nickel electrodeposition ; Charge transfer ; Composite coatings ; Nanocomposites ; Nickel ; Silicon carbide ; Electrodeposition
  8. Source: ECS Transactions ; Volume 41, Issue 44 , 2012 , Pages 47-57 ; 19385862 (ISSN) ; 9781607683452 (ISBN)
  9. URL: http://ecst.ecsdl.org/content/41/44/47