A Note on Preparation of Electroless Nickel Coating on Alumina Micro-particulates as the Forerunner to Reinforce Al-MMCs

2021 ◽  
pp. 205-212
Author(s):  
D. Vijay Praveen ◽  
D. Ranga Raju ◽  
M. V. J. Raju ◽  
T. Nancharaiah
Keyword(s):  
Nickel Coating ◽  
Electroless Nickel

ELECTROLESS NICKEL

Alloy Digest ◽  
1986 ◽  
Vol 35 (4) ◽  
Keyword(s):  
Nickel Coating ◽  
Chemical Reduction ◽  
Electroless Nickel ◽  
Heat Treating ◽  
Corrosion And Wear ◽  
Sodium Hypophosphite ◽  
Work Piece ◽  
Nickel Ions ◽  
Continuous Contact ◽  
Chemical Corporation

Abstract ELECTROLESS NICKEL is a nickel coating deposited by chemical reduction of nickel ions. The most widely used reducing agent is sodium hypophosphite. The thickness of the deposited coating is uniform over all areas of the work-piece that are in continuous contact with fresh plating solution. The process is applicable to a wide variety of metal and nonmetal substrates. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on corrosion and wear resistance as well as heat treating and joining. Filing Code: Ni-332. Producer or source: Occidental Chemical Corporation.

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.

scholarly journals Enhancement of Corrosion Resistance of NiCrFeBSi Coatings Obtained by Flame Thermal Spray Process Adding an Electroless Nickel Coating Ni-P

2017 ◽  
Vol 07 (04) ◽  
pp. 86-97
Author(s):  
Arturo Barba-Pingarrón ◽  
Raúl Valdez-Navarro ◽  
Félix Sánchez-De Jesus ◽  
Ana María Bolarín-Miró ◽  
Rafael González-Parra ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Thermal Spray ◽  
Nickel Coating ◽  
Electroless Nickel ◽  
Thermal Spray Process ◽  
Spray Process

Optimization Studies on Electroless Nickel Coatings

2014 ◽  
Vol 4 (4) ◽  
pp. 1-25 ◽  
Author(s):  
Sanjib Kundu ◽  
Prasanta Sahoo ◽  
Suman Kalyan Das
Keyword(s):  
Wear Resistance ◽  
Corrosion Resistance ◽  
Nickel Coating ◽  
Electroless Nickel ◽  
Bath Temperature ◽  
Solution Concentration ◽  
Electrical And Magnetic Properties ◽  
Nickel Coatings ◽  
Deposition Parameters ◽  
Wear And Corrosion

Electroless nickel coating is a novel method of coating which can be developed in various combinations of alloys and composites each having its unique set of characteristics. Electroless nickel coatings are mainly used for wear and corrosion resistant properties. However, additional characteristics like smoothness of deposit, low friction, descent plating rate, electrical and magnetic properties also make them suitable for a host of applications. The properties of electroless nickel coatings depend mainly on the electroless solution ingredients as well as deposition conditions. Important deposition parameters include bath temperature, concentration of nickel source, concentration of reducing agent, pH of the solution, concentration of surfactants, and so on. Moreover, heat treatment is found to modify the microstructure of the coating and influence certain properties viz. hardness, wear resistance, corrosion resistance, etc. A large number of works have been published by the researchers on the evaluation of electroless nickel coating performance on the basis of hardness, roughness, corrosion resistance, friction and wear resistance for various types of coatings and substrates. Several approaches are proposed in the literatures to solve the problems related with optimization of these parameters. It is felt that a review of the various approaches developed would help to compare their main features and their relative advantages or limitations which will enable to choose the most suitable approach for a particular application and also throw light on aspects that needs further attention. In this regard, the present paper presents a review on the developments done on the optimization of electroless nickel coatings to increase its efficiency.

Low Phosphorus Electroless Nickel Coating Technology

1990 ◽  
Vol 68 (3) ◽  
pp. 75-83 ◽  
Author(s):  
Brian Jackson ◽  
Richard Macary ◽  
Gary Shawhan
Keyword(s):  
Nickel Coating ◽  
Electroless Nickel ◽  
Coating Technology ◽  
Low Phosphorus

Study on the Pretreatment Process for Nickel Coating on Microspheres

2009 ◽  
Vol 75 ◽  
pp. 57-61 ◽  
Author(s):  
Zhen Fang Liang ◽  
Yan Zhao ◽  
Yue Xin Duan
Keyword(s):  
Nickel Coating ◽  
Electroless Nickel ◽  
Average Diameter ◽  
Emi Shielding ◽  
Glass Microspheres ◽  
X Ray ◽  
Conducting Materials ◽  
Plating Solution ◽  
Coupling Treatment ◽  
Scanning Electron

Pretreatment process for electroless nickel coating on ultrafine glass microspheres with an average diameter smaller than 10μm was studied. Through comparative experiments, three-step pretreatment process including washing, coupling and activating was selected to pretreat ultrafine glass microspheres with supersonic. Then the amount and distribution of palladium activate sites absorbed on the surface of microspheres were measured by energy-dispersive X-ray spectroscopy (EDX). It was found that the content of palladium was increased obviously because of addition of coupling treatment and optimization of pretreatment parameters such as agitation method and loading weight, meanwhile palladium was distributed more uniformly due to the action of supersonic. In addition, pretreated microspheres were placed in an alkaline plating solution with supersonic and nickel coated microspheres were obtained. Then morphology and composition of the coating were characterized by scanning electron microscopy (SEM) and EDX. The results proved that EDX results of palladium could characterize the result of pretreatment effectively. The low density Ni coated microspheres may be utilized for manufacturing conducting materials for EMI shielding applications.

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