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Coatings 2016, 6(3), 31; doi:10.3390/coatings6030031

Non-Cyanide Electrodeposited Ag–PTFE Composite Coating Using Direct or Pulsed Current Deposition

1
School of Marine Science and Engineering, Plymouth University, Plymouth PL4 8AA, UK
2
Department of Mechanical Engineering and Built Environment, University of Derby, Markeaton Street, Derby DE22 3AW, UK
*
Author to whom correspondence should be addressed.
Academic Editor: Alessandro Lavacchi
Received: 25 April 2016 / Revised: 12 July 2016 / Accepted: 22 July 2016 / Published: 26 July 2016
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Abstract

The effects of FC-4 cationic surfactant on electrodeposited Ag–PTFE composite coating using direct or pulsed currents were studied using scanning electron microscope (SEM), energy dispersive X-ray (EDS), optical microscope, and a linear tribometer. FC-4:PTFE in various ratios were added to a non-cyanide succinimide silver complex bath. Direct or pulsed current method was used at a constant current density to enable comparison between both methods. A high incorporation rate of PTFE was successfully achieved, with pulsed current being highly useful in increasing the amount of PTFE in the composite coating. The study of coating wear under sliding showed that a large majority of the electrodeposited coatings still managed to adhere to the substrate, even after 10 wear cycles of sliding tests. Performance improvements were achieved on all the samples with a coefficient of friction (CoF) between 0.06 and 0.12. View Full-Text
Keywords: composite; coating; pulsed electrodeposition; surfactant; Ag–PTFE; friction composite; coating; pulsed electrodeposition; surfactant; Ag–PTFE; friction
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Sieh, R.; Le, H. Non-Cyanide Electrodeposited Ag–PTFE Composite Coating Using Direct or Pulsed Current Deposition. Coatings 2016, 6, 31.

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