Cyanide-free sulfite system electrogilding solution and application thereof

A cyanide-free sulfite and gold sulfite technology, applied in the field of electroplating gold solution, can solve problems such as poor stability of cyanide-free gold plating solution, and achieve the effects of wide pH value range, enhanced deep plating ability, and improved stability

Pending Publication Date: 2021-12-31
深圳市潮尊珠宝首饰有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a kind of cyanide-free sulfite system electroplating gold solution and application thereof in order to overcome the problem of poor stability of the cyanide-free sulfite system gold plating solution existing in the prior art. Good stability and high current efficiency within a certain range of current density

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051]An alcohol-plated liquid plating solution, prepared according to the following steps:

[0052] The content of sulfite, 50 g of sodium sulfite, 65 g of potassium citrate, 65 g of potassium sulfite, potassium chloride, 0.07 g of polyethylene glycol (500), 0.01 g of tetraethylene, 5 ml of 500 g of 500 gol (500), 0.01 g of tetrane Tetramine is configured to 1L plating solution;

[0053] According to the following steps:

[0054] The hydroxide was used to adjust the pH of 8.5, and the plating solution was stored for 30 days at 30 ° C, and the case where precipitation, turbidity and discoloration was not present.

[0055] With DC power supply constant current, current density is 0.5A / DM 2 The distance between the cathode and the anode is 5 cm, the temperature is 40 ° C, and the copper sheet is used as the anode, the plating time is 10 h, and the electroplating gold layer is obtained;

[0056] The surface of the gold layer brighter, no resistance, depression and other defects.

Embodiment 2

[0058] An alcohol-plated liquid plating solution, prepared according to the following steps:

[0059] Potates of sulfite, 150 g of sodium sulfite, 100 g of potassium citrate, potassium phosphate, potassium chloride, 0.48 g of polyethylene glycol (500), 0.06 g of nitrate, 10 ml of nitrate oxide, 10 ml of potassium sulfite, potassium chloride, 0.48 g of polyethylene glycol (500) Tetramine is configured to 1L plating solution;

[0060] According to the following steps:

[0061] Using potassium hydroxide is adjusted to have a pH of 7.5, and the plating solution is stored in 30 days at 30 ° C for 30 days, and no precipitation, turbidity, and discoloration.

[0062] With DC power supply constant current, current density is 1A / DM 2 The distance between the cathode and the anode is 5 cm, the temperature is 35 ° C, and the copper sheet is used as the anode, the plating time is 9 h, and the plated gold layer is obtained;

[0063] The surface of the gold layer brighter, no resistance, depr...

Embodiment 3

[0065] An alcohol-plated liquid plating solution, prepared according to the following steps:

[0066] The content of sulfite, 250 g of sodium sulfite, 140 g of potassium citrate, potassium phosphate, 120 g of potassium chloride, 0.08 g of polyethylene glycol (500), 0.08 g of Patients with 500 gol (500), 0.08 g of tetramethylene molecular weight Tetramine is configured to 1L plating solution;

[0067] According to the following steps:

[0068] The pH of the potassium hydroxide was used to adjust the pH of 9.5, and the plating solution was stored for 30 days at 30 ° C, and the case where precipitation, turbidity and discoloration was not present.

[0069] With DC power supply constant current, current density is 2A / DM 2 The distance between the cathode and the anode is 5 cm, the temperature is 55 ° C, and the copper sheet is used as the anode, the plating time is 7 h, and the electroplating gold layer is obtained;

[0070] The surface of the gold layer brighter, no resistance, dep...

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Abstract

The invention discloses a cyanide-free sulfite system electrogilding solution and application thereof. The cyanide-free sulfite system electrogilding solution comprises the following raw materials: 10 g/L-30 g/L of gold sulfite (in terms of gold element), 50 g/L-250 g/L of alkali metal sulfite, 130 g/L-280 g/L of an auxiliary complexing agent, 50 g/-120 g/L of conductive salt and 0.08 g/L-1 g/L of a composite additive. The composite additive comprises an organic additive and an inorganic additive, the organic additive at least contains an alcohol additive, and the inorganic additive at least contains any one of antimony, cerium, copper, tellurium and bismuth ions. The cyanide-free sulfite system electrogilding solution researched and developed is high in gold content, simple in component, stable in property, wide in pH value range, good in deep plating capacity, relatively high in cathode current density and high in current efficiency, and can be applied to preparation of a thick gold layer.

Description

Technical field [0001] The present invention relates to the field of electroplating liquid, and more particularly to an electroplating fluid of a cyanisulfanous sulfate system and its application thereof. Background technique [0002] The metal plated metal plated in the gold plated article enables the gold-plated article with excellent conductivity, thermal conductivity, corrosion resistance, and resistance. Therefore, gold-plated products are widely used in precision instruments, refined processing, defense technology and other industries. [0003] In the electroplating industry, cyanide plating technology is used early. The hydrothermal plating fluid of the cyanide used is stable, excellent in coverage, detachable crystallization, but cyanide is a highly toxic chemical, which has a huge threat to the health and safety of staff. With the development of society, traditional cyanide electropranched techniques are gradually replaced by safe and non-toxic cyanide electroplating tec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D3/48C25D5/00
CPCC25D3/48C25D5/00
Inventor 黄丽娜
Owner 深圳市潮尊珠宝首饰有限公司
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