Method for non-cyanide imitation gold plating of Cu-Zn binary alloy

A binary alloy, cyanide imitation gold technology, applied in the field of cyanide-free imitation gold electroplating, to achieve the effects of good dispersion, moderate conductivity and strong depth capability

Active Publication Date: 2014-06-18
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In order to solve the above problems, the present invention provides a Cu-Zn binary alloy electroplating solution for cyanide-free imitation gold electroplating on low carbon steel and its application method

Method used

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  • Method for non-cyanide imitation gold plating of Cu-Zn binary alloy
  • Method for non-cyanide imitation gold plating of Cu-Zn binary alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020]The low-carbon steel cyanide-free imitation gold electroplating Cu-Zn binary alloy electroplating solution of the present embodiment and its specific use method are carried out according to the following steps: One, according to the different requirements to surface roughness, can adopt 150#, 800#, 1500# #, 2000# sandpaper to grind the surface of 18AL low-carbon steel, or polish it, and then put 18AL low-carbon steel in acetone or alcohol and use an ultrasonic cleaner to treat it at room temperature for 5min~10min; Derusting low-carbon steel, according to the degree of corrosion on the surface of low-carbon steel, the treatment time is generally 30~60s at room temperature; then rinse with deionized water; Potassium pyrophosphate and deionized water are prepared as an activation solution, and the treatment time is 20s at room temperature. After activation, the 18AL low-carbon steel can be directly polished and coppered without cleaning; 4. According to potassium pyrophosph...

Embodiment 2

[0022] The difference between this example and Example 1 is that the concentration of potassium pyrophosphate in step 3 is 200 g / L, the activation process is carried out at room temperature, and the treatment time is 30 s. Others are the same as in Embodiment 1.

Embodiment 3

[0024] The difference between this example and Example 1 or 2 is that the concentration of potassium pyrophosphate in step 3 is 300 g / L, the activation process is carried out at room temperature, and the treatment time is 10 s. Others are identical with embodiment one or two.

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Abstract

The invention provides a plating solution for the non-cyanide imitation gold plating of a Cu-Zn binary alloy on low carbon steel, and its use method in order to improve the problems of severe toxicity, bad anode dissolvability and high treatment cost of three wastes of cyanide-containing plating solutions and the problems of complex composition, narrow range of technological parameters and unrealistic imitation gold color of non-cyanide plating solutions in present imitation gold plating technologies. The method is characterized in that the method comprises the following steps: an activated matrix can be directly plated without cleaning, so the operation is simple; the imitation gold plating solution is composed of potassium pyrophosphate, copper sulfate, zinc sulfate and glycerin, so the imitation gold plating solution has the advantages of green property, environmental protection, good dispersity, strong homogeneous plating ability, simple composition and easy maintenance; and the prepared gold imitation plating solution can meet the requirements of the cross cut test requirements of national standard GB9286-1998 paint and varnish film; and the obtained coating is passivated and seal-protected, and the protected coating meets the 5% brine neutral salt spray test indexes of the national standard GB5938-86 Corrosion Resistance Test Method of Metal Coating and Chemical Treatment Layer of Light Industrial Product, and can be used as a decorative coating.

Description

technical field [0001] The invention relates to the field of cyanide-free imitation gold electroplating. Background technique [0002] Gold is deeply loved by people for its dazzling and gorgeous colors, so gold plating has always occupied a large proportion in decorative electroplating, but pure gold electroplating is limited due to the high price, low hardness and poor wear resistance of gold. . The imitation gold coating not only has a golden color, which can meet the decorative requirements, but also improves the mechanical properties of the coating such as hardness and wear resistance, and also saves gold. It has obvious economic benefits and broad development prospects. However, most of the current imitation gold electroplating processes are based on cyanidation brass plating. This process has a small working current, short electroplating time, poor anode solubility, and the cyanide-containing plating solution is highly toxic, and the cost of three wastes is high. If ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D3/56C25D5/36C25D5/48
Inventor 张锁江王倩李庆阳
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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