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A kind of nanocomposite electroplating solution, its preparation method and zinc alloy electroplating parts

A nano-composite, zinc alloy technology, applied in the direction of fasteners, electrolytic coatings, sliding fastener components, etc., can solve the problems of poor corrosion resistance

Active Publication Date: 2017-11-21
ZHEJIANG WEIXING IND DEV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The copper coating prepared by this method has better bonding force with the zinc alloy substrate, but the corrosion resistance is poor

Method used

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  • A kind of nanocomposite electroplating solution, its preparation method and zinc alloy electroplating parts
  • A kind of nanocomposite electroplating solution, its preparation method and zinc alloy electroplating parts
  • A kind of nanocomposite electroplating solution, its preparation method and zinc alloy electroplating parts

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preparation example Construction

[0041] The present invention also provides a kind of preparation method of nanocomposite electroplating solution, comprises the following steps:

[0042] Cuprous cyanide, zinc cyanide, sodium cyanide, sodium carbonate, potassium sodium tartrate, ammonium chloride and nano-SiO 2 Mix with water to obtain the above nanocomposite electroplating solution. In the present invention, cuprous cyanide, zinc cyanide, sodium cyanide, sodium carbonate, potassium sodium tartrate, ammonium chloride and water are preferably prepared to obtain the first mixed solution, and then a small amount of mixed solution is mixed with dispersant and silicon dioxide to obtain The second mixed solution is ultrasonically dispersed after being stirred and mixed, and finally the second mixed solution is added to the first mixed solution to obtain a nanocomposite electroplating solution. The nanocomposite electroplating solution that makes according to the above method is the nanocomposite electroplating soluti...

Embodiment 1

[0055] Preparation of nanocomposite electroplating solution: wherein, the concentration of cuprous cyanide is 25g / L, the concentration of zinc cyanide is 11g / L, the concentration of sodium cyanide is 47g / L, the concentration of sodium carbonate is 30g / L, and the concentration of sodium potassium tartrate is 10g / L, ammonium chloride concentration is 6g / L, nano-SiO 2 Particle size is 15±5nm, nano SiO 2 The concentration is 1g / L, and the PDDA concentration is 5mg / L.

[0056] The preparation method is as follows: first configure the composition without dispersant and nano-SiO according to the ratio of the above components 2 Copper-zinc electroplating solution (preparation method is the same as comparative example 1), gets a small amount of electroplating solution and adds dispersant again, then adds nano-SiO 2 Particles, stirred for 10 minutes, ultrasonically dispersed for 60 minutes after mixing, and finally this containing dispersant and nano-SiO 2 A small amount of electrop...

Embodiment 2

[0061] Prepare the nanocomposite electroplating solution with following proportioning according to the method in embodiment 1: cuprous cyanide concentration is 25g / L, and zinc cyanide concentration is 11g / L, and sodium cyanide concentration is 47g / L, and sodium carbonate concentration The concentration of sodium potassium tartrate is 30g / L, the concentration of potassium sodium tartrate is 10g / L, the concentration of ammonium chloride is 6g / L, and nano-SiO 2 Particle size is 15±5nm, nano SiO 2 The concentration is 4g / L, and the PDDA concentration is 50mg / L.

[0062] Put the prepared electroplating solution into the electroplating tank with copper-zinc alloy plate as the anode, adjust the temperature controller to make the temperature in the tank 35°C, adjust the pH of the plating solution to 12 through the pH meter, and adjust the current valve so that the temperature of the electroplating solution is The current density is 0.5A / dm 2 , and then put the zinc alloy zipper head...

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Abstract

The invention provides a nano-composite electroplating solution. The nano-composite electroplating solution is prepared from, by concentration, 23-26 g / L of cuprous cyanide, 10-12 g / L of zinc cyanide, 43-51 g / L of sodium cyanide, 25-35 g / L of sodium carbonate, 10-20 g / L of sodium potassium tartrate tetrahydrate, 4-8 g / L of ammonium chloride, 1-4 g / L of nano SiO2 and the balance water. By adding the nano SiO2, the degree of polarization of the cathode is increased, and growth of Cu-Zn alloy grains is prevented, so that a coating is more refined and compact, the porosity of a deposited layer is decreased, the particle-reinforced metal-based composite coating is formed, and accordingly the corrosion resistance of the coating is improved. It is indicated through test results that the corrosion current of the coating is greatly decreased, and it is proved that the corrosion resistance of the nano-composite coating is obviously improved compared with a Cu-Zn alloy coating. The invention further provides a preparing method of the nano-composite electroplating solution and a zinc alloy electroplated part.

Description

technical field [0001] The invention belongs to the technical field of electroplating, and in particular relates to a nanocomposite electroplating solution, a preparation method thereof and zinc alloy electroplating parts. Background technique [0002] Zinc alloy has a low melting point and can be die-cast into various parts with complex shapes. The surface of die-cast parts is smooth, dense, and accurate in size, with low processing costs and high production efficiency. It is suitable for mass production, so zinc alloy die-casting technology is used to make parts It has developed rapidly at home and abroad, and its industrial applications are becoming more and more extensive. [0003] Although zinc alloy die castings have the above-mentioned advantages, the material itself has poor chemical stability and is easily oxidized in the air and loses its surface luster. To improve its corrosion resistance and decorative properties, surface coating must be carried out. Since zinc ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D3/58C25D15/00C25D7/02
CPCC25D3/58C25D7/02C25D15/00
Inventor 刘委明陈国贵王从敏
Owner ZHEJIANG WEIXING IND DEV
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