Effect on Electroless Nickel Coating on Magnesium Alloy by Nickel Electroless Plating Parameters

2011 ◽  
Vol 295-297 ◽  
pp. 1522-1525
Author(s):  
Xiao Min Wang ◽  
Jun Duo
Keyword(s):  
Magnesium Alloy ◽  
Process Parameters ◽  
Ph Value ◽  
Nickel Coating ◽  
Electroless Nickel ◽  
Molar Ratio ◽  
Electroless Nickel Plating ◽  
Nickel Plating ◽  
Optimum Conditions ◽  
Bath Stability

Electroless nickel plating on magnesium alloy was studied when NiSO4as the main salt in the solution. The influence of the composition of the solution and process parameters on the coating appearance, the plating rate and bath stability was studied too. As a result, the optimum conditions of electroless nickel are: The main salt and reducing agent molar ratio between 0.3 and 0.45, mixed complexion agents was used, temperature 90°C, pH value 6.5.

Deposition mechanism of electroless nickel plating of composite coatings on magnesium alloy

2019 ◽  
Vol 207 ◽  
pp. 1299-1308 ◽  
Author(s):  
Wei Shang ◽  
Xiaoqiang Zhan ◽  
Yuqing Wen ◽  
Yuqing Li ◽  
Zhe Zhang ◽  
...  
Keyword(s):  
Magnesium Alloy ◽  
Composite Coatings ◽  
Electroless Nickel ◽  
Electroless Nickel Plating ◽  
Nickel Plating ◽  
Deposition Mechanism

Electroless nickel plating on ZM6 (Mg–2.6Nd–0.6Zn–0.8Zr) magnesium alloy substrate

2010 ◽  
Vol 204 (21-22) ◽  
pp. 3629-3635 ◽  
Author(s):  
Yanrui Gao ◽  
Chuming Liu ◽  
Shengli Fu ◽  
Jing Jin ◽  
Xin Shu ◽  
...  
Keyword(s):  
Magnesium Alloy ◽  
Electroless Nickel ◽  
Electroless Nickel Plating ◽  
Nickel Plating ◽  
Alloy Substrate

Deposition Mechanism Study of a Novel Electroless Nickel Plating Technique on AZ91D Magnesium Alloy

2011 ◽  
Vol 393-395 ◽  
pp. 40-43
Author(s):  
Jian Gang Qian ◽  
Tian Zhao
Keyword(s):  
Magnesium Alloy ◽  
Electroless Nickel ◽  
Nickel Layer ◽  
High Catalytic Activity ◽  
Electroless Nickel Plating ◽  
Nickel Plating ◽  
Mechanism Study ◽  
Deposition Mechanism ◽  
Az91d Magnesium Alloy ◽  
Initial Deposition

A novel direct electroless nickel plating method was developed for the AZ91D magnesium alloy. The electroless nickel initial deposition morphology was analyzed by scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). The initial deposition characteristics of the coating and the deposition mechanism of the nickel layer are discussed. The results show that after activation, an uneven scaly-activated membrane was formed on the AZ91D magnesium alloy surface. The weakest part of the activated membrane dissolved first, where small Ni particles deposited initially. These deposited Ni particles had high catalytic activity and they were involved in the catalytic reduction reaction of hypophosphite, from which P was precipitated. As the plating proceeded, the number of the deposited Ni particles gradually increased in a three-dimensional manner and the surface was gradually covered by the growing cellular particles. A compact pore-free nickel-plated film was finally formed.

A novel process for electroless nickel plating on anodized magnesium alloy

2008 ◽  
Vol 254 (16) ◽  
pp. 5016-5022 ◽  
Author(s):  
Shuo Sun ◽  
Jianguo Liu ◽  
Chuanwei Yan ◽  
Fuhui Wang
Keyword(s):  
Magnesium Alloy ◽  
Electroless Nickel ◽  
Electroless Nickel Plating ◽  
Nickel Plating

An innovative procedure of electroless nickel plating in fluoride-free bath used for AZ91D magnesium alloy

2015 ◽  
Vol 653 ◽  
pp. 271-278 ◽  
Author(s):  
Dalong Yan ◽  
Gang Yu ◽  
Bonian Hu ◽  
Jun Zhang ◽  
Zhengwei Song ◽  
...  
Keyword(s):  
Magnesium Alloy ◽  
Electroless Nickel ◽  
Electroless Nickel Plating ◽  
Nickel Plating ◽  
Az91d Magnesium Alloy

Electroless nickel plating on magnesium alloy

1998 ◽  
Vol 96 (3) ◽  
pp. 10-16 ◽  
Author(s):  
A.K. Sharma ◽  
M.R. Suresh ◽  
H. Bhojraj ◽  
H. Narayanamurthy ◽  
R.P. Sahu
Keyword(s):  
Magnesium Alloy ◽  
Electroless Nickel ◽  
Electroless Nickel Plating ◽  
Nickel Plating

Low Temperature and Low Phosphorus Electroless Nickel Plating

2011 ◽  
Vol 233-235 ◽  
pp. 302-305 ◽  
Author(s):  
Li Guo Ma ◽  
He Liu ◽  
Ju Jun Li ◽  
Yan Feng He
Keyword(s):  
Ph Value ◽  
Electroless Nickel ◽  
Alkaline Solutions ◽  
Electroless Nickel Plating ◽  
Nickel Plating ◽  
Deposited Metal ◽  
Low Phosphorus ◽  
Optimal Reaction Temperature ◽  
Optimal Reaction ◽  
Energy Disperse Spectroscopy

Direct electroless nickel plating on n-Si(100) wafers in alkaline solutions was performed without any activation procedure in advance. The effect of pH and temperature on the size of deposited metal particles was examined. Moreover, The phosphorus contents of deposits were also analyzed by the energy disperse spectroscopy. The results indicated that the optimal reaction temperature was 60°C and the optimal pH value was 10.0 with a plating rate of about 3.0 µm/hr and the phosphorus content of about 3.6 wt%.

Study on Chemical Conversion Treatment and Electroless Nickel Plating on AZ91D Magnesium Alloy

2010 ◽  
Vol 148-149 ◽  
pp. 698-701
Author(s):  
Xing Wu Qiu
Keyword(s):  
Magnesium Alloy ◽  
Magnesium Alloys ◽  
Galvanic Corrosion ◽  
Electroless Nickel ◽  
Chemical Conversion ◽  
Conversion Coating ◽  
Electroless Nickel Plating ◽  
Nickel Plating ◽  
Az91d Magnesium Alloy ◽  
High Microhardness

AZ91D magnesium alloy were used as the materials in this experiment. The directly electroless nickel plating, the stannate conversion processing and the electroless nickel plating on the surface of the magnesium alloys that have formed the stannate chemical conversion film on their surface were researched. The morphologies, anticorrosion ability and the hardness of plating of the magnesium alloys after chemical conversion processing and plating nickel were analysed by scanning electron microscope, salt droplet experiment, microhardness survey etc. The result of the experiment showed that, the conversion film unions with the substrate well, the conversion coating can avoid intense galvanic corrosion after the expiration of the plating, and enhanced the corrosion resistance of the plating. The nickel plating deposited on the conversion coating has high microhardness which could provide good protection for the magnesium alloys.

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