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K-gold jewelry cyanogen-free electrolytic polishing solution and electrolytic polishing method thereof

An electrolytic polishing and electrolytic voltage technology, applied in the field of cyanide-free electrolytic polishing liquid, can solve the problems of high processing cost, large residual liquid amount, dangerous use, etc., and achieve the effects of simple recovery, low cost and easy purchase.

Inactive Publication Date: 2009-09-02
谢良和
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method of treating K gold jewelry with potassium cyanide has the following problems. The first is that potassium cyanide is highly toxic, and it is very dangerous to use. It needs special approval from the public security department, and a special person is responsible for adding potassium cyanide and recovering the residual liquid; The cost of frying gold with potassium cyanide is quite high; the third is that the amount of residual liquid after potassium cyanide frying is large, and it needs to be stored in a special sealed container.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] First put 500ml of water into the electrolytic tank, then add 50g of thiourea, then drop in 3ml of sulfuric acid, stir to dissolve the thiourea, then add water to 1000ml, and then prepare the electropolishing solution;

[0023] Connect the jewelry to the anode of the electrode of the electrolytic cell, and connect the cathode to the stainless steel plate, lead plate or graphite plate;

[0024] Intermittent or continuous shaking of jewelry manually or mechanically;

[0025] Turn on the DC power supply, using voltages of 4 volts, 5 volts, 6 volts, 7 volts, 8 volts, 9 volts, and 10 volts; time 30 seconds, 60 seconds, 90 seconds, 120 seconds, 150 seconds, 150 seconds, 180 seconds , 210 seconds, 240 seconds, 270 seconds, 300 seconds, 330 seconds, 360 seconds, 390 seconds, 420 seconds, 450 seconds, 480 seconds, 510 seconds, 540 seconds, 570 seconds, 600 seconds for combination tests, all can reach the basic Effect, that is, most of the black layer on the jewelry can be remov...

Embodiment 2

[0028] First put 500ml of water into the electrolytic tank, then add 50g of thiourea, then drop in 5ml of sulfuric acid, stir to dissolve the thiourea, then add water to 1000ml, and then prepare the electropolishing solution;

[0029] Connect the jewelry to the anode of the electrode of the electrolytic cell, and connect the cathode to the stainless steel plate, lead plate or graphite plate;

[0030] Intermittent or continuous shaking of jewelry manually or mechanically;

[0031] Turn on the DC power supply, respectively use voltages of 4 volts, 5 volts, 6 volts, 7 volts, 8 volts, 9 volts, and 10 volts; time 30 seconds, 60 seconds, 90 seconds, 120 seconds, 150 seconds, 150 seconds, 180 seconds , 210 seconds, 240 seconds, 270 seconds, 300 seconds, 330 seconds, 360 seconds, 390 seconds, 420 seconds, 450 seconds, 480 seconds, 510 seconds, 540 seconds, 570 seconds, 600 seconds for combined tests, all can reach the basic Effect.

[0032] The sulfuric acid in the present embodimen...

Embodiment 3

[0034] First put 500ml of water into the electrolytic tank, then add 50g of thiourea, then drop in 8ml of sulfuric acid, stir to dissolve the thiourea, then add water to 1000ml, and the electrolytic polishing solution is prepared;

[0035] Connect the jewelry to the anode of the electrode of the electrolytic cell, and connect the cathode to the stainless steel plate, lead plate or graphite plate;

[0036] Intermittent or continuous shaking of jewelry manually or mechanically;

[0037] Turn on the DC power supply, respectively use voltages of 4 volts, 5 volts, 6 volts, 7 volts, 8 volts, 9 volts, and 10 volts; time 30 seconds, 60 seconds, 90 seconds, 120 seconds, 150 seconds, 150 seconds, 180 seconds , 210 seconds, 240 seconds, 270 seconds, 300 seconds, 330 seconds, 360 seconds, 390 seconds, 420 seconds, 450 seconds, 480 seconds, 510 seconds, 540 seconds, 570 seconds, 600 seconds for combined tests, all can reach the basic Effect.

[0038]The sulfuric acid among the present em...

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PUM

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Abstract

The invention discloses a K-gold jewelry cyanogen-free electrolytic polishing solution and an electrolytic polishing method thereof, the polishing solution is a water solution with the following material proportion: 50 to 150g / L of thiourea, 3 to 15ml / L of sulphuric acid or 20 to 50ml / L of phosphoric acid or 20 to 50g / L of tartrate. The invention has the advantages of no need of using potassium cyanide, thus being non-toxic, and also no need of uniformly managing recycled waste liquid intensively by related government departments, thus being environment-friendly and safe; the waste liquid can be easily recycled and can be repeatedly used; medicines used by the method and the polishing solution have low cost and are easily purchasable, and need not to be examined and approved by related government and public security departments, and the method and the polishing solution are easy to be popularized; and the method and the polishing solution can be widely used for removing black layers on gold and white gold from 10K to 24K or red K-gold.

Description

technical field [0001] The invention relates to a cyanide-free electrolytic polishing solution for K gold (gold or platinum) jewelry and an electrolytic polishing method thereof. Background technique [0002] The craftsmanship of modern jewelry processing is inseparable from the two processes of holding molds and frying gold. The so-called molding refers to the process of meticulously repairing jewelry blanks. Due to the shrinkage cavity and deformation of jewelry in the previous casting process, the surface of the casting mold usually has problems such as trachoma, peaking, heavy edges, depressions and even fractures, which need to be repaired and corrected. If it is a bracelet, the buckles must be welded and formed, and the bracelets and chains must be processed into pieces to make live buckles. Welding and repair welding in the touch-up process usually causes K gold (gold or platinum) to form a black layer on the surface of K gold after being welded or repaired. At pres...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25F3/22
Inventor 谢良和
Owner 谢良和
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