Electroforming liquid for gold cyanide-free electroforming process

An electroforming fluid and electroforming technology, applied in electroforming, electrolysis process, etc., can solve the problems of not being widely put into production, unable to meet demand, etc., and achieve the effect of simplifying electroforming fluid components, easy preparation, and easy maintenance.

Inactive Publication Date: 2019-06-21
深圳市昊扬电铸技术开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Thereby still can not be widely put into production on the whole, can not sat

Method used

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  • Electroforming liquid for gold cyanide-free electroforming process
  • Electroforming liquid for gold cyanide-free electroforming process
  • Electroforming liquid for gold cyanide-free electroforming process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The electroforming solution formula is as follows:

[0039]

[0040] Electroformed according to the recipe, using 0.43A / dm 2 The cathode current density, electroforming time 10 hours.

[0041] A thick gold product with a thickness of 180um, a mass fraction of 99.95%, and a micro-Vickers hardness of 110HV can be obtained. The surface is bright and smooth, and the color is golden and bright. The casting layer has excellent toughness.

Embodiment 2

[0043] The electroforming solution formula is as follows:

[0044]

[0045]

[0046] Electroformed according to the recipe, using 0.43A / dm 2 The cathode current density, electroforming time 10 hours.

[0047] A thick gold product with a thickness of 180um, a mass fraction of 99.94%, and a micro-Vickers hardness of 125HV can be obtained. The surface is bright and smooth, and the color is golden and bright. The casting layer has excellent toughness.

Embodiment 3

[0049] The electroforming solution formula is as follows:

[0050]

[0051] Electroformed according to the recipe, using 0.43A / dm 2 The cathode current density, electroforming time 10 hours.

[0052] A thick gold product with a thickness of 180um, a mass fraction of 99.93%, and a micro-Vickers hardness of 145HV can be obtained. The surface is bright and smooth, and the color is golden and bright. The casting layer has good toughness.

[0053] (4) Embodiment 4

[0054] The electroforming solution formula is as follows:

[0055]

[0056]

[0057] Electroformed according to the recipe, using 0.43A / dm 2 The cathode current density, electroforming time 10 hours.

[0058] A thick gold product with a thickness of 180 microns, a mass fraction of 99.92%, and a micro-Vickers hardness of 165HV can be obtained. The surface is bright and smooth, and the color is golden and bright. The casting layer has certain toughness.

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Abstract

The invention relates to electroforming liquid for a gold cyanide-free electroforming process. The electroforming liquid is prepared from the components: 17-35 g/l of sodium gold sulfide, 50-80 g/l ofethylenediamine sulfate, 50-90 g/l of anhydrous sodium sulfite, 3-10 g/l of sodium 3-nitrobenzoate and 0.1-1 g/l of indium sulfate, the electroforming liquid for the gold cyanide-free electroformingprocess is prepared, and then gold products are formed through electroforming. According to the electroforming liquid for the gold cyanide-free electroforming process, the problems of difficult operation, unstable electroforming liquid, short service life, and the like of current cyanide-free gold electroforming processes are solved, thus the cyanide-free hard gold electroforming process with stable electroforming liquid, easy operation, and wide application to practical production is achieved, and the difficulty and production cost of cyanide-free hard gold electroforming production are lowered.

Description

technical field [0001] The invention relates to the technical field of metal electroforming, and more specifically refers to an electroforming liquid used in a gold cyanide-free electroforming process. Background technique [0002] In recent years, gold jewelry has been favored by people because of its bright and noble color, strong corrosion resistance and anti-tarnish ability, and the property of gold preservation. People have higher requirements for gold jewelry, such as fashion, popularity, etc., so the production process of gold jewelry must be improved to meet the needs of the consumer market. In this context, the cyanide-free electroforming gold process has been vigorously developed, and has attracted widespread attention for its advantages such as high hardness, three-dimensional product shape, less gold consumption, environmental protection and non-toxicity. The existing cyanide-free hard gold production system is gold sulfite, alkali metal sulfite, organic phospha...

Claims

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Application Information

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IPC IPC(8): C25D1/00C25D3/48
Inventor 罗翔
Owner 深圳市昊扬电铸技术开发有限公司
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