An overall aspect of electroless Ni-P depositions—A review article

Krishnan, Keerthana; John, S.; Srinivasan, K.N.; Praveen, J. Jones; Ganesan, M.; Kavimani, P. M.

doi:10.1007/s11661-006-0134-7

Cited by 324 publications

(179 citation statements)

References 23 publications

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“…While compared with nickel based coatings manufactured with galvanic techniques, electroless plated Ni-P coating presents following advantages [8][9]: -Nickel coating tend to create coating of homogenous thickness, on numerous surfaces exposed to coating solution, regardless to shape and position of coated piece, -Coating structure is homogenous and independent from substrate surface structure, -Higher hardness that can be increased by further heat treatment, -Higher corrosion resistance, -Can be manufactured directly on aluminum substrate, -Can be easily soldered.…”

Section: Overview Of Electroless Ni-p Coating Propertiesmentioning

confidence: 99%

Tribological properties evaluation of Ni-P coating manufactured with electroless plating on aluminum alloy substrate

et al. 2017

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Abstract.Results of tribological tests of Ni-P coating were presented in following paper. Tests were conducted with tribotester device using linear reciprocating wear test. Tribological wear test conditions, especially speed, load and sample geometry were described. Characteristics of coefficient of friction variation during wear testes were recorded. Conclusions included results interpretation especially focusing on influence of coating thickness in its properties.

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Section: Overview Of Electroless Ni-p Coating Propertiesmentioning

confidence: 99%

Tribological properties evaluation of Ni-P coating manufactured with electroless plating on aluminum alloy substrate

et al. 2017

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“…This uniform thickness and composition of a coating results in uniform mechanical and physical properties of the surface layer. 1,2,3 Besides, Ni-P coatings deposited with the electroless process can have good anticorrosive properties, wear resistance and high hardness. [4][5][6] An electroless Ni-P coating has a higher hardness and a better corrosion resistance than the AISI 316 stainless steel.…”

Section: Introductionmentioning

confidence: 99%

“…If the content of phosphorous is between 10-13 % mass fraction (high phosphorus), the Ni-P coatings deposited with the electroless process are amorphous. 1,[9][10][11][12] To achieve high adhesion, a thorough surface preparation, or a removal of foreign contaminants from the base-metal surface and elimination of mechanically distorted surface layers, resulting in a clean, healthy surface structure, is required. 13 With a prolonged heat treatment, i.e., aging at high temperatures, electroless deposited nickel-phosphorous coatings begin to crystallize and lose their preferable amorphous character.…”

Section: Introductionmentioning

confidence: 99%

“…15 The maximum hardness can be obtained if the phosphorus content is around 4 % mass fraction. 1,[9][10][11][12] The application of an appropriate heat treatment of Ni-P coatings deposited with the electroless process can have a significant impact on their hardness. [1][2][3][4][5] The microhardness of Ni-P coatings deposited with the electroless process depends on the heat treatment of the coatings, the content of phosphorus in the coatings and on the contents of other alloying elements in the coatings.…”

Section: Introductionmentioning

confidence: 99%

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Heat treatment of electroless Ni-P layers on an austenitic stainless-steel substrate

Maretić¹,

Smoljan²,

Iljkić³

2017

Mater. Tehnol.

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Properties of electroless deposited nickel-phosphorous coatings on an austenitic stainless-steel substrate were investigated. The main study was focused on the influence of heat treatment on the microhardness and microstructure analysis of electroless Ni-P coatings. A nickel-phosphorous coating was deposited without nickel-strike pre-coating treatment. An electroless Ni-P layer was deposited on a stainless-steel substrate. Sodium hypophosphite was used as the reducing agent. The microstructure and morphology of heat-treated electroless specimens were analyzed with optical and scanning electron microscopy. Adhesivity was estimated with a Vickers indenter. Based on the experimental results, it can be concluded that heat-treated electroless nickel-phosphorous coatings have a higher microhardness than non-heat-treated electroless nickel-phosphorous coatings. An analysis of the Vickers indentation results showed that the proposed electroless process gives satisfactory results. Keywords: electroless, deposition, coatings, heat treatment, stainless steel, micro-hardness Preiskovane so bila lastnosti kemijsko nane{ene plasti nikelj -fosfor, na podlagi iz avtenitnega nerjavnega jekla. Glavni {tudij je bil usmerjen na vpliv toplotne obdelave na mikrotrdoto in analizo mikrostrukture kemijsko nane{enega Ni-P nanosa. Nanos nikelj -fosfor je bil nane{en brez predhodnega premaza. Kemijski nanos Ni-P je bil nane{en na osnovo iz nerjavnega jekla. Natrijev hipofosfid je bil uporabljen kot redukcijsko sredstvo. Mikrostruktura in morfologija kemijsko nane{enega vzorca je bila analizirana s svetlobno in z vrsti~no mikroskopijo. Adhezivnost je bila dolo~ena z vtiskovanjem po Vickers piramidi. Na osnovi rezultatov preizkusov je mogo~e zaklju~iti, da ima toplotno obdelan kemijski nanos nikelj -fosfor vi{jo trdoto kot neobdelan kemijski nanos nikelj -fosfor. Analiza rezultatov Vickers vtiskov je pokazala, da predlagani kemijski postopek daje zadovoljive rezultate.

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“…Among the advantages, the most important are good corrosion and wear resistance and high hardness. For these reasons, Ni-P layers are used in micro-galvanic and optical applications and in the automotive industry as protective layers (Ref [1][2][3]. The most popular techniques for obtaining these types of coatings are: electroand electroless plating.…”

Section: Introductionmentioning

confidence: 99%

Quantitative Image Analysis of Ni-P Coatings Deposited on Carbon Fibers

Kozera

Bucki

Sałacińska

et al. 2015

J. of Materi Eng and Perform

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In this work, polyacrylonitrile (PAN)-based carbon fibers coated with different thicknesses of Ni-P coatings were studied. The coatings were deposited by electroless metallization lasting from 3 to 22 min and consisted of approximately 3 wt.% phosphorous. Computer quantitative image analysis was used to characterize the surface features and thickness of the coatings as a function of the time of metallization. The results showed that quantitative image analysis is a useful technique for the measurement of the coating thickness and can be used as a tool for obtaining an innovative description of the Ni-P coating morphology. The morphology of the coatings and their thicknesses were investigated by scanning electron microscopy. The image analyses were performed using the proprietary software Micrometer, developed at the Faculty of Materials Science and Engineering, Warsaw University of Technology. The observations revealed that a specific feature of the coating topography is the hemispherical bulge of a diameter ranging from 0.1 to 10 lm. The thickness of the coatings increases linearly with the metallization time. The obtained results indicated that the methodology proposed in the present work can be successfully applied and possesses several advantages over the traditionally used weight measurements technique.

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An overall aspect of electroless Ni-P depositions—A review article

Cited by 324 publications

References 23 publications

Tribological properties evaluation of Ni-P coating manufactured with electroless plating on aluminum alloy substrate

Tribological properties evaluation of Ni-P coating manufactured with electroless plating on aluminum alloy substrate

Heat treatment of electroless Ni-P layers on an austenitic stainless-steel substrate

Quantitative Image Analysis of Ni-P Coatings Deposited on Carbon Fibers

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