scholarly journals Coulostatic monitoring the deposition rate of electroless nickel plating.

1990 ◽  
Vol 41 (3) ◽  
pp. 295-299
Author(s):  
Masao MATSUOKA ◽  
Kazuya IWAMOTO ◽  
Tadao HAYASHI
Keyword(s):  
Deposition Rate ◽  
Electroless Nickel ◽  
Electroless Nickel Plating ◽  
Nickel Plating

Preliminary Step in Formulating the Optimum Electroless Nickel Bath Using Taguchi Method

2012 ◽  
Author(s):  
M.N. Mohamad Ibrahim ◽  
C. W. Sia ◽  
Z. A. Ahmad
Keyword(s):  
Deposition Rate ◽  
Orthogonal Array ◽  
Electroless Nickel ◽  
Deposition Process ◽  
Reducing Agent ◽  
Complexing Agent ◽  
Nickel Salt ◽  
Electroless Nickel Plating ◽  
Nickel Plating ◽  
Taguchi Orthogonal Array

Teknologi penyaduran nikel secara tanpa elektrik telah berkembang pesat dan diaplikasikan secara meluas dalam banyak bidang industri disebabkan ciri sadurannya yang unggul. Penyaduran tanpa elektrik ialah suatu proses pengautomangkinan iaitu saduran nikel berlaku daripada penurunan garamnya oleh agen penurunan yang hadir dalam larutan elektrik. Komposisi asas larutan tanpa elektrik di dalam kajian ialah NiSO4.6H2O, NaH2PO2.H2O, (NH4)3C6H5O7, agen pembasah dan suhu operasinya ialah 50°C. Dalam kajian awal ini, teknik Taguchi telah digunakan untuk menyelidik beberapa faktor yang dapat mempengaruhi kadar saduran supaya larutan elektrolit nikel yang optimum dapat diformulasikan. Faktor-faktor ini ialah kepekatan garam nikel, agen penurunan, agen pengkompleks dan pH larutan. Susunatur ortogonal Taguchi L9 telah digunakan untuk merancang eksperimen dengan tiga paras bagi setiap faktor. Kepingan keluli lembut digunakan sebagai substrat. Proses penyaduran dijalankan selama setengah jam dan kadar saduran didapati dengan menimbang sampel sebelum dan selepas saduran. Data-data yang diperolehi telah dianalisis berdasarkan nisbah isyarat kepada bisingan Taguchi dan analisis varians. Keputusan menunjukkan bahawa faktor pH paling mempengaruhi kadar saduran diikuti dengan faktor kepekatan garam nikel, agen penurunan dan agen pengkompleks. Formulasi larutan elektrolis yang optimum seterusnya dapat diramalkan berdasarkan keputusan ini. Kata kunci: Penyaduran nikel secara tanpa elektrik; kaedah Taguchi; susun atur ortogonal Taguchi; kadar saduran; larutan tanpa elektrik yang optimum Electroless nickel plating has been rapidly developed and widely used in many fields due to its superior properties of coating. It is an autocatalytic process in which the deposited nickel is reduced from its ionic state by chemical reducing agent in bath. The basic compositions of the bath and operating condition are NiSo4.6H2O, NaH2PO2.H2O,(NH4)3C6H5O7, wetting agent and at 50°C. In this preliminary study, Taguchi Robust Design Technique was used to rank several factors that may affect the deposition rate in order to formulate the optimum electroless nickel bath. They were concentration of nickel salt, reducing agent, complexing agent and pH of the bath. The Taguchi orthogonal array L9 was used for the experimental design with three levels of consideration for each factor. Mild steel plated were used as substrates. The deposition process was carried out for half an hour and the rates were obtained by weighing the samples before and after plating. The response (deposition rate) was analysed based on the Taguchis signal-to-noise ratio (S/N) and analysis of variance (ANOVA). The results showed that the most notable factor influencing the deposition rate was the pH, followed by the concentration of nickel salt, reducing agent and complexing agent. The optimum bath formulation was then predicted based on these results. Key words: Electroless nickel plating; Taguchi's method; Taguchi orthogonal array; deposition rate; optimum bath formulation

The Influences of Anticipated Heat Treatment on the Electroless Nickel Plating on Magnesium Alloys

2010 ◽  
Vol 139-141 ◽  
pp. 452-455
Author(s):  
Xiu Zhi Zhang ◽  
Ying Jie Li ◽  
Xing Wang Duan ◽  
Ya Wei Shao ◽  
Jun Bo Xiong ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Magnesium Alloys ◽  
Deposition Rate ◽  
Corrosion Test ◽  
Electroless Nickel ◽  
Corrosion Property ◽  
Electroless Nickel Plating ◽  
Nickel Plating ◽  
Electroless Coating ◽  
The Given

In this paper, effects of anticipated heat treatment on the electroless nickel plating coated on magnesium alloys AZ91D were investigated by using heat treatments of solution (T4) and solution + aging (T6) before electroless nickel plating. The influence of anticipated heat treatment on the structure, composition and anti-corrosion property of electroless coating were studied by using Scanning Electrical Microscope (SEM), EDS and Corrodkote corrosion test. It is shown that compared with the as-casted magnesium alloys and samples treated with T4, the deposition rate of Ni, the P contained in the coating and the anti-corrosion property of samples treated with T6 are the highest for the given system studied, and T6 treatment can promote the anti-corrosion property of the coating effectively.

Selective Electroless Nickel Plating on Polyelectrolyte Multilayer Platforms

Langmuir ◽  
2001 ◽  
Vol 17 (21) ◽  
pp. 6610-6615 ◽  
Author(s):  
T. C. Wang ◽  
B. Chen ◽  
M. F. Rubner ◽  
R. E. Cohen
Keyword(s):  
Electroless Nickel ◽  
Electroless Nickel Plating ◽  
Nickel Plating ◽  
Polyelectrolyte Multilayer

Optimising the Electroless Nickel Plating Process for Textile Application

2007 ◽  
Vol 11 (3) ◽  
pp. 60-70 ◽  
Author(s):  
C.W. Kan ◽  
C.W.M. Yuen ◽  
S.Q. Jiang ◽  
W.S. Tung
Keyword(s):  
Electroless Nickel ◽  
Electroless Nickel Plating ◽  
Nickel Plating

Study on the Surface Metallization of Aramid Fibers

2012 ◽  
Vol 503-504 ◽  
pp. 1216-1219
Author(s):  
Long Li ◽  
Xue Yu Hu
Keyword(s):  
Surface Morphology ◽  
Fiber Surface ◽  
Electroless Nickel ◽  
Aramid Fiber ◽  
Electroless Nickel Plating ◽  
Nickel Plating ◽  
Aramid Fibers ◽  
Surface Metallization

In this paper, aramid fiber surface metallization was investigated by electroless nickel plating technology. Acid nickel plating and alkaline nickel plating of aramid fiber was compared. Through experiment, it was shown that the temperature of alkaline nickel plating was lower compared with acid nickel plating, and resistance of metalized aramid fibers by alkaline nickel plating was 36.8Ω•cm, and the resistance by acid plating was 51.2Ω•cm. The surface morphology of fibers was observed using SEM

Fabrication and Research of Electroless Nickel Plating on Carbon Fiber with Palladium-Free Activation

2010 ◽  
Vol 148-149 ◽  
pp. 410-415
Author(s):  
Xiao Ping Luo ◽  
Ming Gang Zhang ◽  
Chun Xiang Lv
Keyword(s):  
Tensile Strength ◽  
Carbon Fiber ◽  
Fiber Surface ◽  
Electroless Nickel ◽  
Electroless Nickel Plating ◽  
Nickel Plating ◽  
Adhesive Properties ◽  
Nickel Deposition ◽  
X Ray ◽  
Electroless Ni

A new procedure of surface activation without using palladium salt is proposed for electroless nickel plating (Ni-P) on carbon fiber. The optimal formula and technical conditions for palladium-free activated electroless Ni-P were obtained by orthogonal experiments. The effects of nitric acid processing time on the quality of nickel coating was investigated .The effects of varying concentrations of Ni2 + on the rate of weight gain during the Ni2 + complex adsorption process were also analyzed and the kinetic equation of the process was established. The theoretical values calculated by the equation were proven to be consistent with the experimental verification. The material characteristics of the deposited layers were analyzed by scanning electron microscopy (SEM), energy-dispersive x-ray spectroscopy (EDX) and X-ray diffraction (XRD). The tensile strength of the carbon fibers was analyzed by the Weibull method, and this showed that when the thickness of the Ni-P coating reached 0.150μm, the tensile strength reached a maximum value. The experimental results showed that the nickel deposition on the carbon fiber surface obtained by this method, had the same uniformity, compactness and adhesive properties as the one by conventional electroless Ni-P.

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