The effect of SiO2 nanoparticles dispersion on physico-chemical properties of modified Ni–W nanocomposite coatings

Sassi, W.; Dhouibi, L.; Berçot, P.; Rezrazi, M.

doi:10.1016/j.apsusc.2014.10.142

Cited by 28 publications

(8 citation statements)

References 40 publications

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“…According to the literature [27,28], to achieve a composite with good corrosion resistance and mechanical properties, the hard particle content of the coating should be increased. It should be mentioned that electroplating was carried out at various current densities, agitation speeds, and silica concentrations-the parameters which have been reported as important determinants of the particle content of the composite coatings in the literature [14,29,30]; however, no acceptable and reproducible changes in the silica volume percentage of the composites were found. The results show the silica content of the composites would be low under this classic situation, and electroplating parameters cause no significant effects on the particle incorporation in the coatings.…”

Section: Co-electrodeposition Of Silicamentioning

confidence: 99%

Effects of organically modified nanoclay on cellular morphology, tensile properties, and dimensional stability of flexible polyurethane foams

2013

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This article presents a method for the electrochemical preparation of a coating of nickel-silica nanocomposites on a carbon steel substrate. The incorporation of hydrophilic silica particles into the Ni composite coating during co-electrodeposition is so difficult due to the small size and the hydrophilicity of SiO 2 particle, generally less than 2 v% of silica is incorporated into the composite at different current densities, agitation speeds and silica concentrations. The effect of the presence of four surfactants, namely cocamidopropyl betaine (CAPB), decylglycoside (DG), cetyltrimethyl ammonium chloride (CTAC) and ammonium lauryl ether sulfate (ALES), on overcoming this problem was investigated in this research, and the surfactants were found to greatly influence the surface charge of silica, silica incorporation percentage and the microstructure of the composite. In fact, upon increasing the internal stresses, the products prepared in the presence of CAPB and DG were found to crack to some degree. CTAC was found to lead to entrapment mode silica co-deposition in the Ni coating. Furthermore, the addition of ALES into an electrolyte bath negatively supercharged silica surfaces and increased silica dispersion, which led to a dramatic increase in the silica incorporation percentages to around 14 v%. The results showed that Ni-SiO 2 composites prepared in the presence of ALES had better corrosion resistance, hardness and wear properties.

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Section: Co-electrodeposition Of Silicamentioning

confidence: 99%

Effects of organically modified nanoclay on cellular morphology, tensile properties, and dimensional stability of flexible polyurethane foams

2013

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“…Therefore, the focus of the current research was mainly on how to increase the content of nanoparticles in the hybrid layer. Some of the literature focused on the effect of the added amount and the surface modification of silica particles on the properties of the electroplated layer. Also, the agglomeration of nanoparticles was likely to occur; some works explored the effects of surfactant and solvent , on the mechanical properties and corrosion resistance of the layers.…”

Section: Introductionmentioning

confidence: 99%

Influence of Silica Particle Size on the Corrosion Behavior of Electroplated Silica–Ni Hybrid Layer

Yang

2020

ACS Omega

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Silica−Ni hybrid layers were electroplated on a Q235 steel plate in a Watt nickel plating solution with varying sizes of silica, and a pure nickel layer was prepared as a blank sample. The surface morphology, composition, and crystal structure of the electroplated layers were examined using a field emission scanning electron microscope (FESEM), an energy-dispersive spectrometer (EDS), and a X-ray diffractor (XRD). The corrosion resistance of the samples was evaluated by the experiments of potentiodynamic polarization, electrochemical impedance spectroscopy, and salt spray test in NaCl solutions. The results showed that the smaller the particle size of silicon, the higher the content of silicon in the layer was, and the better the corrosion resistance of the layer was. However, when the particle size is 10 nm, agglomeration would happen, which leads to a decrease in the corrosion resistance performance, 50 nm silica−Ni hybrid layer showed the optimal corrosion resistance with the highest silica content.

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“…NiW alloy coatings own the advantages of compact structure, high hardness and good temperature performance. Besides, they also have the merits of good wear and oxidation resistance, excellent self-lubrication and corrosion resistance performance, especially under high temperature [5][6][7][8][9][10]. Nano NiFeW alloy possesses the advantages of NiW and NiFe alloy in hardness and have good wear and corrosion resistance [11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Effects of electrolyte concentration and current density on the properties of electro-deposited NiFeW alloy coatings

Sun

Zhao

et al. 2017

Bull Mater Sci

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NiWP alloy coatings were prepared by electrodeposition, and the effects of ferrous chloride (FeCl 2), sodium tungstate (Na 2 WO 4) and current density (D K) on the properties of the coatings were studied. The results show that upon increasing the concentration of FeCl 2 , initially the Fe content of the coating increased and then tended to be stable; the deposition rate and microhardness of coating decreased when the cathodic current efficiency (η) initially increased and then decreased; and for a FeCl 2 concentration of 3.6 g l −1 , the cathodic current efficiency reached its maximum of 74.23%. Upon increasing the concentration of Na 2 WO 4 , the W content and microhardness of the coatings increased; the deposition rate and the cathode current efficiency initially increased and then decreased. The cathodic current efficiency reached the maximum value of 70.33% with a Na 2 WO 4 concentration of 50 g l −1 , whereas the deposition rate is maximum at 8.67 µm h −1 with a Na 2 WO 4 concentration of 40 g l −1. Upon increasing the D K , the deposition rate, microhardness, Fe and W content of the coatings increased, the cathodic current efficiency increases first increased and then decreased. When D K was 4 A dm −2 , the current efficiency reached the maximum of 73.64%.

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The effect of SiO2 nanoparticles dispersion on physico-chemical properties of modified Ni–W nanocomposite coatings

Cited by 28 publications

References 40 publications

Effects of organically modified nanoclay on cellular morphology, tensile properties, and dimensional stability of flexible polyurethane foams

Effects of organically modified nanoclay on cellular morphology, tensile properties, and dimensional stability of flexible polyurethane foams

Influence of Silica Particle Size on the Corrosion Behavior of Electroplated Silica–Ni Hybrid Layer

Effects of electrolyte concentration and current density on the properties of electro-deposited NiFeW alloy coatings

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