Effect of heat treatment, top coatings and conversion coatings on the corrosion properties of black electroless Ni–P films

Liu, Y.; Beckett, Duncan; Hawthorne, D.

doi:10.1016/j.apsusc.2010.12.105

Cited by 25 publications

(19 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Compared with the smooth nickel metal and black nickel oxide surfaces, the reflectance of the porous NiP model is considerably suppressed to around 10 −4 0.01%, which is low enough to explain our experimental data ranging from 0.04% to 0.1%. In this case, r 1 μm, h 5 μm, and l 3 μm, which are typical values in the literature [1,4,[14][15][16][18][19][20]. We successfully obtained almost spectrally flat reflectance within the wavelength range of interest with the assumed model in our simulation.…”

Section: Resultsmentioning

confidence: 74%

“…The net thickness of the absorption layer in our simulations was around 1 μm, corresponding to an l of several micrometers, which is also assumed on the basis of previous reports [4,14,15,18].…”

Section: A Modeling Of a Porous Nip Black Surface And Fdtd Simulationmentioning

confidence: 98%

“…We modeled the geometry and composition of a porous NiP black surface by referring to the published reports [1,4,[14][15][16][18][19][20]24]. On the basis of electron microscopic studies of porous NiP black surfaces [15,16,18,20], we assumed a simple surface morphology of conical pores with an absorption layer on a metal substrate, as shown in Fig.…”

Section: A Modeling Of a Porous Nip Black Surface And Fdtd Simulationmentioning

confidence: 99%

“…Currently available broadband low-reflectance materials include gold black [7]; carbon nanotubes (CNTs) [8][9][10][11][12][13]; black nickels [3,4,14], including porous nickelphosphorus (NiP) black surfaces [1,[15][16][17][18][19][20]; and black paint. Antireflection textured surfaces [21][22][23] are also categorized as low-reflectance surfaces; the texture of a nondispersive material provides nearly perfect transmission rather than high absorption [23].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Comprehensive characterization of broadband ultralow reflectance of a porous nickel–phosphorus black surface by numerical simulation

et al. 2012

View full text Add to dashboard Cite

Porous nickel-phosphorus (NiP) black surfaces exhibit excellent low reflectance in the visible and near-IR regions. Through use of a model of the surface morphology and composition, the reflectance was numerically simulated by a three-dimensional finite-difference time-domain method to determine the origin of the low reflectance. In agreement with experimental results, the simulations showed a spectrally flat, quite low reflectance of <0.1% over the entire visible-near-IR region under certain conditions. The reflectance depended strongly on the thickness of the black nickel oxide layer and the aspect ratio of the three-dimensional surface morphology. A method of validating the reflectance of porous NiP black surfaces is suggested.

show abstract

Section: Resultsmentioning

confidence: 74%

Section: A Modeling Of a Porous Nip Black Surface And Fdtd Simulationmentioning

confidence: 98%

Section: A Modeling Of a Porous Nip Black Surface And Fdtd Simulationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Comprehensive characterization of broadband ultralow reflectance of a porous nickel–phosphorus black surface by numerical simulation

et al. 2012

View full text Add to dashboard Cite

show abstract

“…9 Nickel with an amorphous structure has a lower hardness than nickel with a crystalline structure. 4,[10][11][12][16][17][18][19][20][21][22][23][24][25][26][27][28] After the heat treatment, the structure of the coating is more crystalline; moreover, the intermetallic nickel phosphide (Ni 3 P) phase appears. 9,10,15 The hardness of coatings can increase with the appearance of the intermetallic Ni 3 P phase and a higher crystallinity of nickelphosphorous coatings.…”

Section: Introductionmentioning

confidence: 99%

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

Maretić¹,

Smoljan²,

Iljkić³

2017

Mater. Tehnol.

View full text Add to dashboard Cite

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.

show abstract

Single-step electrodeposition of superhydrophobic black NiO thin films

et al. 2019

View full text Add to dashboard Cite

Highlights 9  Electrodeposition of superhydrophobic black NiO films on Cu is studied. 10 Superhydrophobicity is attributed to the formation of a rough surface. 11 An improvement of the corrosion resistance of Cu sub-layers is observed. Abstract 14 Black finished surfaces have extensive applications in many domains, such as optics, solar cells, 15 and aerospace. The single step electrodeposition of superhydrophobic black NiO films from a 16 dimethyl sulfoxide based electrolyte is described in this paper. The physicochemical properties 17 of the obtained film were characterized using Scanning Electron Microscopy, X-ray Diffraction, 18 and electrochemical tests (Electrochemical Impedance Spectroscopy and potentiodynamic 19 polarization). A rough surface with a low reflection of light was formed after the deposition 20 process that increased the contact angle of water from about 87º (for bare Cu) to 163º (in 21 presence of the black coating), which improved the corrosion resistance of the Cu substrate by 22 about 30%. The formed black NiO film revealed a notably high stability and kept its appearance 23 even after corrosion tests.24

show abstract

Effect of heat treatment, top coatings and conversion coatings on the corrosion properties of black electroless Ni–P films

Cited by 25 publications

References 7 publications

Comprehensive characterization of broadband ultralow reflectance of a porous nickel–phosphorus black surface by numerical simulation

Comprehensive characterization of broadband ultralow reflectance of a porous nickel–phosphorus black surface by numerical simulation

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

Single-step electrodeposition of superhydrophobic black NiO thin films

Contact Info

Product

Resources

About