Comparison of H–Cr single layer and Ni–P/H–Cr duplex coating

Hadipour, Ali; Monirvaghefi, S. M.

doi:10.1179/1743294415y.0000000007

Cited by 10 publications

(3 citation statements)

References 18 publications

(24 reference statements)

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“…Electroless plating is an effective surface treatment technology, [6][7][8][9][10][11][12] and electroless deposition nickel-phosphorus composite coatings reinforced with hard particles are extensively applied in mechanical, chemical and electronic industries owing to their high wear and corrosion resistance. [13][14][15][16] Earlier literatures have studied the preparation method and properties of the nickel-phosphorus composites on Al-Si alloys.…”

Section: Introductionmentioning

confidence: 99%

Influences of different reinforcement particles on performances of electroless composites

Fang

Liao

et al. 2017

Surface Engineering

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In this work, nickel-cobalt-phosphorus composites co-deposited with three different particles (aluminium oxide, silicon nitride and silicon carbide) were, respectively, prepared on ASCM20 + 5Fe aluminium alloy by electroless plating. The effects of the different reinforcement particles on the morphology, composition, microstructure, microhardness, wear resistance and corrosion resistance of composites were investigated. The results show that the largest incorporation amount of particles in number density, the finest grains, the highest microhardness, the best wear resistance and the lowest average friction coefficient are found to occur on the silicon carbide reinforced coating. The best corrosion resistance is observed on the coating co-deposited with aluminium oxide.

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Section: Introductionmentioning

confidence: 99%

Influences of different reinforcement particles on performances of electroless composites

Fang

Liao

et al. 2017

Surface Engineering

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“…[4,[16][17][18][19]. Improvement of the coating performance through fabrication of multilayer structures has been proposed as an effective strategy for enhancement of the metallic coatings [8,18,[20][21][22][23]. The present work was aimed to improve the wear and corrosion properties of Ni-P deposits through fabrication of functionally graded Ni-P multilayer coating.…”

Section: Introductionmentioning

confidence: 99%

Fabrication and characterisation of functionally graded Ni-P coatings with improved wear and corrosion resistance

Hadipour

Rahsepar

Hayatdavoudi

2019

Surface Engineering

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In this study, the functionally graded Ni-P coatings with low phosphorus top most layers were deposited on the copper substrates by the electroless plating process. The surface morphology and cross-section observations were made by using scanning electron microscopy and optical microscopy. The results showed that electroless deposition of the Ni-P coatings with gradual change of phosphorus content led to a crack-free compact nodular morphology. Also, by using the graded Ni-P coatings, the wear and corrosion resistance were improved. The multilayer coating with the sequence of Ni-high P/Ni-medium P/Ni-low P layers from the substrate to the top surface exhibited the best wear and corrosion resistance.

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“…1 The SEM cross-sectional images of nickel-tungsten FG coatings applied in eight steps with duty cycles, respectively 88…”

mentioning

confidence: 99%

Functionally graded nickel–tungsten coating: electrodeposition, corrosion and wear behaviour

Mahmood

Rouhaghdam

Torabinejad

2016

Canadian Metallurgical Quarterly

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Nickel-tungsten functionally graded (FG) coatings were developed by pulse electrodeposition. To make a FG structure, pulse parameters were selected in eight layers with the tungsten content increasing along the thickness. The gradual increase in tungsten content to the surface will increase wear resistance and reduce the risk of cracking at the substrate. To investigate the microstructure and cross-section of Ni-W coating scanning electron microscope and to measure the chemical composition of the coating the energy dispersive spectroscopy analysis was used. Electrochemical and pin-on-disk wear tests were performed to investigate corrosion resistance and wear behaviour of the coating, respectively. Results showed that with reduction of duty cycle or increasing of frequency along this eight-layer structure, the tungsten content increased upward the surface. Results showed the superior wear resistance of the coating as compared to that of pure nickel. Moreover, the coefficient of friction decreased from 0.74 to 0.49 by an increase in the sliding distance.On a développé par dépôt électrolytique pulsé des revêtements de nickel et tungstène classés par fonction (FG). Afin de fabriquer une structure classée par fonction, on a choisi les paramètres de pulsation dans huit couches, avec la teneur en tungstène augmentant avec l'épaisseur. L'augmentation graduelle de la teneur en tungstène vers la surface va augmenter la résistance à l'usure et va réduire le risque de fissure près du substrat. On a utilisé la microscopie électronique à balayage pour examiner la microstructure et la coupe transversale du revêtement de Ni et W, et l'analyse spectroscopique à dispersif d'énergie pour mesurer sa composition chimique. On a effectué des essais électrochimiques et d'usures par pointe-surdisque afin d'examiner la résistance à la corrosion et le comportement à l'usure du revêtement, respectivement. Les résultats ont montré qu'avec la réduction du cycle ou avec l'augmentation de la fréquence tout au long de cette structure à huit couches, la teneur en tungstène augmentait vers la surface. Les résultats ont également montré la résistance supérieure à l'usure du revêtement par rapport à celle du nickel pur. De plus, le coefficient de friction diminuait de 0.74 à 0.49 avec une augmentation de la distance de glissement.

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Comparison of H–Cr single layer and Ni–P/H–Cr duplex coating

Cited by 10 publications

References 18 publications

Influences of different reinforcement particles on performances of electroless composites

Influences of different reinforcement particles on performances of electroless composites

Fabrication and characterisation of functionally graded Ni-P coatings with improved wear and corrosion resistance

Functionally graded nickel–tungsten coating: electrodeposition, corrosion and wear behaviour

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