Hypophosphite system plating Ni-P alloy electroplating solution and electroplating method

A technology of hypophosphite and electroplating solution, which is applied in the field of nickel electroplating, can solve the problems of poor wear resistance, weak corrosion resistance, and low coating hardness, and achieve strong wear resistance, high hardness, and corrosion resistance. high effect

Inactive Publication Date: 2015-12-02
WUXI QINGYANG MACHINERY MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing hypophosphite 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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  • Hypophosphite system plating Ni-P alloy electroplating solution and electroplating method
  • Hypophosphite system plating Ni-P alloy electroplating solution and electroplating method
  • Hypophosphite system plating Ni-P alloy electroplating solution and electroplating method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

[0034]

[0035]

[0036] 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 1, the temperature is 50°C, and the electroplating time is 40min.

Embodiment 2

[0038] The formulation of the electroplating solution is as follows:

[0039]

[0040] Plating process conditions: the pulse width of a single pulse square wave current is 1ms, the duty cycle is 25%, and the average current density is 3A / dm 2 ; The pH is 1.5, the temperature is 55°C, and the electroplating time is 35min.

Embodiment 3

[0042] The formulation of the electroplating solution is as follows:

[0043]

[0044] 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 2, the temperature is 60°C, and the electroplating time is 30min.

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Abstract

The invention discloses a hypophosphite system plating Ni-P alloy electroplating solution and an electroplating method. The electroplating solution comprises the following components by content: 200-260 g / L of NiSO4.6H2O, 30-70 g / L of NiCl2.6H2O, 30-70 g / L pf hypophosphite, 40-70 g / L of H3PO4, 25-50 g / L of potassium sodium tartrate, 5-10 g / L of saccharinate, 0.3-0.5 g / L of pyridinium hydroxy propyl sulfobetaine and 0.05-0.2 g / L of a cationic surfactant. The hypophosphite system plating Ni-P alloy electroplating solution and the electroplating method have the advantages that potassium sodium tartrate is selected as a coordination agent, so that Ni-P co-deposition is facilitated; pyridinium hydroxy propyl sulfobetaine and saccharinate are compositely selected as brightening agents, so that the rigidity, abrasion resistance and corrosion resistance of Ni-P alloy plating can be high.

Description

technical field [0001] The invention relates to the technical field of nickel electroplating technology, in particular to an electroplating solution and an electroplating method for Ni-P alloy plating in a hypophosphite 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 close to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D3/56C25D5/20
Inventor 唐靖岚
Owner WUXI QINGYANG MACHINERY MFG
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