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Electrochemistry polishing liquid used for silver workpieces, application of electrochemistry polishing liquid and oxidation resistance method of silver workpieces

An electrochemical and polishing liquid technology, applied in the field of anti-oxidation and electrochemical polishing liquid, can solve the problems of pollution, health hazards of manufacturers, high processing costs, etc.

Inactive Publication Date: 2020-11-27
吴镇材
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In the prior art, there is also a method for preventing silver oxidation by electroplating a silver layer on the surface of silver, but the electroplating solution used in the method is an silver cyanide potassium electrolyte made of silver nitrate and potassium cyanide, wherein the cyanide Potassium chloride is a highly toxic substance, which will not only cause harm to the health of the manufacturer during the production of silver products, but also require high treatment costs to avoid environmental pollution from waste liquid

Method used

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  • Electrochemistry polishing liquid used for silver workpieces, application of electrochemistry polishing liquid and oxidation resistance method of silver workpieces
  • Electrochemistry polishing liquid used for silver workpieces, application of electrochemistry polishing liquid and oxidation resistance method of silver workpieces
  • Electrochemistry polishing liquid used for silver workpieces, application of electrochemistry polishing liquid and oxidation resistance method of silver workpieces

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preparation example Construction

[0026] The present invention has no special requirements on the preparation method of the electrochemical polishing liquid, and the preparation method known to those skilled in the art can be used.

[0027] The present invention also provides the application of the electrochemical polishing solution described in the above technical solution in inhibiting the oxidation of silver workpieces.

[0028] The invention provides a kind of anti-oxidation method of silver workpiece, comprises the following steps:

[0029] The silver workpiece is subjected to mechanical polishing, electrochemical polishing and physical polishing in sequence to obtain a silver workpiece with an anti-oxidation mirror effect; the method of electrochemical polishing includes: using the mechanically polished silver workpiece as an anode and a positive electrode of a DC stabilized voltage supply connected, and immersed in the polishing tank filled with the electrochemical polishing solution described in the ab...

Embodiment 1

[0040] Put the silver jewelry on the mold holding table, and use 800 type sandpaper to polish the silver jewelry; then place the silver workpiece and 0.2cm high-purity zirconia beads figure 2 In the shown high-speed grinding centrifuge, mechanical polishing is carried out at 500r / min; the surface of the silver workpiece obtained by mechanical polishing is obviously rough, the brightness is not enough, and there are obvious particles under the electron microscope; figure 2 Among them, the silver jewelry is placed in the deep layer of high-purity zirconia beads, and the white part is high-purity zirconia beads.

[0041] The mechanically polished silver workpiece is used as the anode to connect with the positive pole of the DC stabilized voltage power supply, and immersed in the polishing tank filled with electrochemical polishing liquid; the stainless block tank is used as the cathode to connect with the negative pole of the DC stabilized voltage power supply, and immersed in t...

Embodiment 2

[0045] Put the silver jewelry on the mold holding table, and use 800 type sandpaper to polish the silver jewelry; then place the silver workpiece and 0.2cm high-gloss beads figure 2 In the high-speed grinding centrifuge shown, mechanical polishing is carried out at 700r / min;

[0046] The mechanically polished silver workpiece is used as the anode to connect with the positive pole of the DC stabilized voltage power supply, and immersed in the polishing tank filled with electrochemical polishing liquid; the stainless block tank is used as the cathode to connect with the negative pole of the DC stabilized voltage power supply, and immersed in the In the polishing tank; connect the direct current stabilized power supply and carry out electrochemical polishing to the silver workpiece; the composition of the electrochemical polishing liquid is: sodium sulfate 30g / L, sodium citrate 50g / L, sodium sulfite 3g / L, nitrous acid Sodium 2g / L, sodium lauryl sulfate 1g / L; The temperature of d...

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Abstract

The invention relates to electrochemistry polishing liquid used for silver workpieces, application of the electrochemistry polishing liquid and an oxidation resistance method of the silver workpieces,and belongs to the technical field of silver product processing. The electrochemistry polishing liquid includes conducting salt, a reducing agent, a corrosion inhibitor, a surface active agent and water. The concentration of the conducting salt is 60-120 g / L. The concentration of the reducing agent is 1-3 g / L. The concentration of the corrosion inhibitor is 0.5-2 g / L. The concentration of the surface active agent is 0.5-1 g / L. The conducting salt is sodium sulfate and sodium citrate. By conducting electrochemistry polishing on the silver workpieces through the polishing liquid, while the polishing bright effect is achieved, the oxidation resistance effect can also be achieved.

Description

Technical field [0001] The invention relates to the technical field of silver product processing, and specifically relates to an electrochemical polishing liquid for silver workpieces and its application and an anti-oxidation method for silver workpieces. Background technique [0002] Silver is a relatively active precious metal. It easily reacts with sulfur or hydrogen sulfide in the air to form black silver sulfide, which turns yellow and black. In order to prevent the oxidation of silver, the existing technology usually coats the surface of silver with a layer of bright silver to form a platinum effect, which effectively isolates the silver from contact with the outside air. However, such measures generally only last for 4 months, and then they will recover. The true color effect of silver. [0003] In the prior art, there is also a method of electroplating a silver layer on the surface of silver to prevent silver from oxidizing. However, the electroplating solution used...

Claims

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Application Information

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IPC IPC(8): C25F3/22
CPCC25F3/22
Inventor 吴镇材
Owner 吴镇材
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