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Nickel phosphor alloy electroplating solution and application thereof

A technology of nickel-phosphorus alloy and electroplating solution, which is applied in the field of electrodeposition preparation of metal coating, can solve the problems of environment and operator injury, and achieve the effect of smooth surface, high hardness and high chemical stability

Active Publication Date: 2012-07-04
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since these traditional nickel-phosphorus alloy coating preparation technologies mostly use an aqueous electrolyte system, the electrolyte often contains strong acid and strong alkali, which is easy to cause harm to the environment and operators. Therefore, it is necessary to develop a green and environmentally friendly electrolyte and prepare it Nickel-phosphorus alloy coating is of great significance

Method used

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  • Nickel phosphor alloy electroplating solution and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Stir and mix 500 g of choline chloride and 450 g of ethylene glycol at 80° C. to obtain about 0.9 L of a mixed solution. Take 50ml of the above mixed solution, add 3.5gNiCl 2 , 0.3gNaH 2 PO 2 ·H 2 O is dissolved in it in turn to obtain the nickel-phosphorus alloy electroplating solution.

[0021] Electrolytic nickel was used as the anode and copper foil was used as the cathode to electroplate in the nickel-phosphorus alloy electroplating solution obtained above, the plating voltage was 1.0V, the temperature of the electroplating solution was 30°C, and the electroplating time was 10 minutes. Methanol and water cleaning, cleaning and drying to obtain a nickel-phosphorus alloy coating.

[0022] The nickel-phosphorus alloy coating prepared in this embodiment has a smooth surface and no cracks. The microstructure of the coating is amorphous, and its nanohardness is 6.0GPa. Scanning electron micrographs of nickel-phosphorus alloy coatings as figure 1 shown.

Embodiment 2

[0024] Stir and mix 500 g of choline chloride and 450 g of ethylene glycol at 80° C. to obtain about 0.9 L of a mixed solution. Take 50ml of the above mixed solution, add 9.5gNiCl 2 , 0.8gNaH 2 PO 2 ·H 2 O is dissolved in it in turn to obtain the nickel-phosphorus alloy electroplating solution.

[0025] Electrolytic nickel is used as the anode, and copper foil is used as the cathode, and electroplated in the nickel-phosphorus alloy electroplating solution obtained above, the plating voltage is 0.6V, the temperature of the electroplating solution is 20°C, and the electroplating time is 20min. Methanol and water cleaning, cleaning and drying to obtain a nickel-phosphorus alloy coating.

[0026] The surface of the nickel-phosphorus alloy coating prepared in this embodiment is relatively smooth without cracks. The microstructure of the coating is composed of nanocrystalline and amorphous, and its nanohardness is about 4.5GPa.

Embodiment 3

[0028] Stir and mix 500 g of choline chloride and 600 g of ethylene glycol at 80° C. to obtain a mixed solution of about 1 L. Take 50ml of the above mixed solution, add 9gNiCl 2 , 4gNaH 2 PO 2 ·H 2 O is dissolved in it in turn to obtain the nickel-phosphorus alloy electroplating solution.

[0029] Electrolytic nickel is used as the anode, and copper foil is used as the cathode, and electroplated in the nickel-phosphorus alloy electroplating solution obtained above, the plating voltage is 1.5V, the temperature of the electroplating solution is 35°C, and the electroplating time is 20min. Methanol and water cleaning, cleaning and drying to obtain a nickel-phosphorus alloy coating.

[0030] The surface of the nickel-phosphorus alloy coating prepared in this embodiment is relatively rough without cracks. The microstructure of the coating is amorphous, and its nanohardness is about 5.0GPa.

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Abstract

The invention discloses a nickel phosphor alloy electroplating solution, wherein NiCl2 and NaH2PO2.H2O are used as solutes, a mixed solution of choline chloride and glycol is used as a solvent, and the molar ratio of choline chloride and glycol in the mixed solution is 1:2-1:4; on a basis of 1 L of the volume of the mixed solution, the concentration of NiCl2 is 0.3-1.5 mol / L, and the concentration of NaH2PO2.H2O is 0.05-0.5 mol / L. The invention also provides an application of the nickel phosphor alloy electroplating solution; pure nickel is used as an anode, and a workpiece to be electroplated is used as a cathode; electroplating is performed in the nickel phosphor alloy electroplating solution; the temperature of the nickel phosphor alloy electroplating solution is 20-40 DEG C; and the voltage during electroplating is 0.5-2 V. The nickel phosphor alloy electroplating solution of the invention has high chemical stability and high hardness, and is environment-friendly and free of pollution, and the preparation process is simple and controllable; the prepared nickel phosphor alloy plating has a flat surface, is not easy to generate cracks, and can be used in actual production.

Description

technical field [0001] The invention belongs to the field of electrodeposition preparation of metal coatings, and in particular relates to a nickel-phosphorus alloy electroplating solution and its application. Background technique [0002] Nickel-phosphorus alloy coating has high hardness, corrosion resistance, wear resistance and excellent catalytic performance, so it has been widely used in machinery, electronics, petrochemical, aerospace and other fields. According to the different phosphorus content in the nickel-phosphorus alloy coating, nickel-phosphorus alloys can be generally divided into nickel-phosphorus alloys with low phosphorus content (1-5wt%), nickel-phosphorus alloys with medium phosphorus content (5-8wt%) and high-phosphorus alloys. Content of nickel-phosphorus alloy (higher than 9wt%). Nickel-phosphorus alloy coatings with different phosphorus contents have different physical and chemical properties and different forms of existence. For nickel-phosphorus ...

Claims

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Application Information

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IPC IPC(8): C25D3/56
Inventor 谷长栋尤益辉张恒王秀丽涂江平
Owner ZHEJIANG UNIV