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Wear and corrosion properties of electroless nickel composite coatings with PTFE and/or MoS 2 particles

Mohammadi, M ; Sharif University of Technology | 2011

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  1. Type of Document: Article
  2. DOI: 10.1007/s11998-011-9329-y
  3. Publisher: 2011
  4. Abstract:
  5. This study focuses on the effect of co-deposition of PTFE and/or MoS 2 particles on the morphology, wear, and corrosion properties of electroless nickel coating. The composite coating of EN-PTFE-MoS 2 was heat treated at different temperatures for hardness investigations. The surface morphology of coatings was characterized by scanning electron microscopy. Pin-on-disk and potentiodynamic polarization tests were used to study the tribological and corrosion properties of the coatings, respectively. Results of hardness analysis revealed that the hardness of electroless nickel coatings was increased by the heat treatment, and its maximum was gained at 400°C. Wear investigations showed that simultaneous co-deposition of the PTFE and MoS 2 particles into the nickel coating increased the wear resistance of the coating by about 30% and reduced the average value of friction coefficient to 0.25 from 0.65. Corrosion studies illustrated that simultaneous co-deposition of the PTFE and MoS 2 particles led to reduction in corrosion resistance by 10 and 5 times that of EN coating in brine and acidic solution, respectively
  6. Keywords:
  7. Composite coating ; Corrosion ; Electroless nickel ; Wear ; Acidic solutions ; Average values ; Codeposition ; Corrosion property ; Corrosion studies ; Electroless nickel ; Electroless nickel coatings ; Electroless nickel composite coatings ; Friction coefficients ; Pin on disk ; Potentiodynamic polarization tests ; Coatings ; Corrosion resistance ; Friction ; Hardness ; Molybdenum compounds ; Morphology ; Nickel ; Nickel coatings ; Nickel plating ; Scanning electron microscopy ; Wear resistance ; Composite coatings
  8. Source: Journal of Coatings Technology Research ; Volume 8, Issue 4 , 2011 , Pages 527-533 ; 15470091 (ISSN)
  9. URL: http://link.springer.com/article/10.1007%2Fs11998-011-9329-y