Influence of the tungsten content on surface properties of electroless Ni-W-P coatings
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2018
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Materials Research
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Ternary Ni-W-P films were produced by electroless deposition using baths with different tungsten
concentrations. After deposition, the coated surfaces were annealed at 400°C for 1h. Surface morphology
and film composition in the as-plated condition were assessed by SEM and EDS analyses, respectively.
The crystalline phases after annealing were investigated by X-ray diffraction (XRD). Nanoindentation
tests were performed to assess the mechanical properties of the deposited films. Surface roughness
was determined by confocal laser scanning microscopy (CLSM). Friction coefficient was evaluated by
reciprocating were tests in a nanotribometer. The corrosion behavior was evaluated by potentiodynamic
polarization curves. The results showed that the surface morphology, crystallization behavior and
corrosion resistance were affected by the tungsten content in the film. The best corrosion performance
was obtained for the ternary films after annealing. Hardness, surface roughness and friction coefficient
were dependent of the tungsten concentration in the film.
Como referenciar
OLIVEIRA, MARA C.L. de; CORREA, OLANDIR V.; ETT, BARDIA; SAYEG, ISAAC J.; LIMA, NELSON B. de; ANTUNES, RENATO A. Influence of the tungsten content on surface properties of electroless Ni-W-P coatings. Materials Research, v. 21, n. 1, p. 1-13, 2018. DOI: 10.1590/1980-5373-MR-2017-0567. Disponível em: http://repositorio.ipen.br/handle/123456789/29026. Acesso em: 23 Apr 2024.
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