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Electroplating solution for phosphorous acid system plating of Ni-P alloy and electroplating method

A technology of electroplating solution and phosphorous acid, applied in the field of nickel electroplating process, can solve the problems of poor wear resistance, low coating hardness, weak corrosion resistance, etc., and achieve strong wear resistance, high corrosion resistance and high hardness Effect

Inactive Publication Date: 2015-05-20
WUXI XUEJIANG ENVIRONMENT ENG EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing phosphorous acid system Ni-P alloy electroplating generally has the technical defects of low hardness, poor wear resistance and weak corrosion resistance of the coating.
These seriously restrict the large-scale application of Ni-P alloy electroplating in industry

Method used

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  • Electroplating solution for phosphorous acid system plating of Ni-P alloy and electroplating method
  • Electroplating solution for phosphorous acid system plating of Ni-P alloy and electroplating method
  • Electroplating solution for phosphorous acid system plating of Ni-P alloy and electroplating method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The formulation of the electroplating solution is as follows:

[0034]

[0035] Plating process conditions: the pulse width of the single pulse square wave current is 1ms, the duty cycle is 30%, and the average current density is 2A / dm 2 ; The pH is 2, the temperature is 50°C, and the electroplating time is 40min.

Embodiment 2

[0037] The formulation of the electroplating solution is as follows:

[0038]

[0039] Plating process conditions: the pulse width of the single pulse square wave current is 1ms, the duty cycle is 25%, and the average current density is 3A / dm 2 ; The pH is 0.5, the temperature is 55°C, and the electroplating time is 35min.

Embodiment 3

[0041] The formulation of the electroplating solution is as follows:

[0042]

[0043] Plating process conditions: the pulse width of the single pulse square wave current is 2ms, the duty cycle is 20%, and the average current density is 4A / dm 2 ; The pH is 1, the temperature is 60°C, and the electroplating time is 30min.

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Abstract

The invention discloses an electroplating solution for phosphorous acid system plating of Ni-P alloy and an electroplating method. The electroplating solution comprises 200-260g / L NiSO4.6H2O, 30-70g / L NiCl2.6H2O, 20-50g / L H3PO3, 30-50g / L H3BO3, 25-45g / L fluoride, 25-50g / L citrate, 5-10g / L a saccharin salt, 0.5-0.7g / L hydroxyethyl propargyl ether and 0.05-0.2g / L a cationic surfactant. According to the invention, citrate is adopted as the coordination agent to be in favor of co-deposition of nickel and phosphorus and better control of the nickel and phosphorus content of the coating, and hydroxyethyl propargyl ether and the saccharin salt are used in combination as the brightener. Therefore, the Ni-P alloy coating has great hardness, strong wear resistance, and corrosion resistance.

Description

technical field [0001] The invention relates to the technical field of electroplating nickel technology, in particular to an electroplating solution and an electroplating method for plating Ni-P alloys in a phosphorous acid system. Background technique [0002] Ni-P alloy has the characteristics of resisting reducing corrosive medium, especially when the mass fraction of phosphorus in nickel-phosphorus alloy reaches 0.08 or more, its structure is amorphous, and it has high corrosion resistance, wear resistance, weldability, With excellent properties such as magnetic shielding, high hardness, high strength, and high conductivity, it has been widely used in the fields of automobiles, aviation, computers, electronics, chemicals, and petroleum. In recent years, due to the requirements of environmental protection, the technology of replacing chromium coating with other coatings has been paid more and more attention. The hardness of Ni-P alloy coating after heat treatment is clos...

Claims

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Application Information

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IPC IPC(8): C25D3/56
CPCC25D3/562
Inventor 曾雄燕
Owner WUXI XUEJIANG ENVIRONMENT ENG EQUIP
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