CN117737806A - Method for plating hard gold on basis of sulfite of silver substrate - Google Patents
Method for plating hard gold on basis of sulfite of silver substrate Download PDFInfo
- Publication number
- CN117737806A CN117737806A CN202311756143.0A CN202311756143A CN117737806A CN 117737806 A CN117737806 A CN 117737806A CN 202311756143 A CN202311756143 A CN 202311756143A CN 117737806 A CN117737806 A CN 117737806A
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- Prior art keywords
- gold
- plating
- substrate
- sulfite
- solution
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- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 title claims abstract description 55
- 239000010931 gold Substances 0.000 title claims abstract description 55
- 229910052737 gold Inorganic materials 0.000 title claims abstract description 55
- 238000007747 plating Methods 0.000 title claims abstract description 41
- 239000000758 substrate Substances 0.000 title claims abstract description 29
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 title claims abstract description 28
- 229910052709 silver Inorganic materials 0.000 title claims abstract description 25
- 239000004332 silver Substances 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims abstract description 24
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 title claims abstract description 19
- 238000005238 degreasing Methods 0.000 claims abstract description 17
- 239000002253 acid Substances 0.000 claims abstract description 9
- 230000003213 activating effect Effects 0.000 claims abstract description 9
- 238000004140 cleaning Methods 0.000 claims abstract description 9
- 238000000861 blow drying Methods 0.000 claims abstract description 5
- 238000004506 ultrasonic cleaning Methods 0.000 claims abstract description 5
- 238000005406 washing Methods 0.000 claims abstract description 5
- 239000000243 solution Substances 0.000 claims description 26
- 239000010939 rose gold Substances 0.000 claims description 14
- 229910001112 rose gold Inorganic materials 0.000 claims description 14
- 238000002791 soaking Methods 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 238000009713 electroplating Methods 0.000 claims description 9
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 8
- 229920002120 photoresistant polymer Polymers 0.000 claims description 8
- 239000000843 powder Substances 0.000 claims description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 6
- 229940101006 anhydrous sodium sulfite Drugs 0.000 claims description 6
- 229910052802 copper Inorganic materials 0.000 claims description 6
- 239000010949 copper Substances 0.000 claims description 6
- 239000008367 deionised water Substances 0.000 claims description 6
- 229910021641 deionized water Inorganic materials 0.000 claims description 6
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 claims description 6
- 239000003381 stabilizer Substances 0.000 claims description 6
- 239000004576 sand Substances 0.000 claims description 5
- 239000012670 alkaline solution Substances 0.000 claims description 4
- 239000011248 coating agent Substances 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 4
- 239000012266 salt solution Substances 0.000 claims description 4
- 238000005282 brightening Methods 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 239000008139 complexing agent Substances 0.000 claims description 3
- LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical compound [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 3
- 238000005494 tarnishing Methods 0.000 abstract description 3
- 239000010410 layer Substances 0.000 description 21
- 210000004243 sweat Anatomy 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 238000002845 discoloration Methods 0.000 description 3
- 210000001161 mammalian embryo Anatomy 0.000 description 3
- 230000007935 neutral effect Effects 0.000 description 3
- DPLVEEXVKBWGHE-UHFFFAOYSA-N potassium sulfide Chemical compound [S-2].[K+].[K+] DPLVEEXVKBWGHE-UHFFFAOYSA-N 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- 230000005856 abnormality Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000002932 luster Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- FFRBMBIXVSCUFS-UHFFFAOYSA-N 2,4-dinitro-1-naphthol Chemical compound C1=CC=C2C(O)=C([N+]([O-])=O)C=C([N+]([O-])=O)C2=C1 FFRBMBIXVSCUFS-UHFFFAOYSA-N 0.000 description 1
- 229910001316 Ag alloy Inorganic materials 0.000 description 1
- 241000220317 Rosa Species 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
Abstract
The invention discloses a method for plating hard gold on sulfite based on a silver substrate, which comprises the following steps: s1, film stripping; s2, acid washing; s3, ultrasonic cleaning; s4, electrolytic degreasing; s5, activating; s6, after the surface of the base material is cleaned, sulfite hard gold plating operation is carried out; s8, after the gold-plated finished product is cleaned, post-treatment protection is carried out; after the completion, cleaning and blow-drying are carried out. The invention aims to provide a method for preparing silver-based gold-plated jewelry with rich and various styles, strong anti-tarnishing capability, stable quality and moderate price.
Description
Technical Field
The invention belongs to the technical field of jewelry gold plating, and particularly relates to a method for plating hard gold on sulfite based on a silver substrate.
Background
The silver has very good ductility, can produce various and very exquisite ornaments, and is cheap and good. However, silver ornaments easily react with sulfur in air and sweat to generate black substances, so that the silver ornaments lose the original luster and take much time to maintain.
In addition, although gold has good corrosion resistance, golden color and stable quality in all aspects, gold has high price, and the common pure gold (namely plain gold) product has low hardness and is extremely easy to scratch and wear.
Therefore, it is necessary to develop a product with rich and various patterns, strong anti-discoloration capability, stable quality and moderate price.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, the present invention aims to provide a method for preparing silver-based gold-plated jewelry with rich and varied styles, strong anti-tarnishing capability, stable quality and moderate price.
The scheme provides a method for plating hard gold on a silver-based substrate through sulfite, which comprises the following steps:
s1, film stripping: soaking for 3-10 minutes by using a normal-temperature photoresist remover to remove a photoresist layer possibly covered on the surface of the silver substrate;
s2, acid washing: soaking for 5-20 seconds by using 3-5% of dilute sulfuric acid solution to remove an oxide layer;
s3, ultrasonic cleaning: the cleaning liquid is diluted wax removing water, and residues of film removal and foreign matters in sand holes are removed;
s4, electrolytic degreasing: electrolytic removal of foreign matters remained on the surface of the substrate by using a degreasing powder solution with the concentration of 3% -5%, wherein the temperature of the degreasing powder solution is 40-60 ℃, the current density is 2-3 ASD, and the degreasing time is 2-5 minutes;
s5, activating: using a mild activating acid salt solution with the concentration of 2% -6%, soaking for 5-20 seconds to neutralize the alkaline solution remained on the surface of the cleaned substrate and activate the surface of the substrate;
s6, after the surface of the substrate is cleaned, performing sulfite plating 24K hard gold operation:
s8, after the gold-plated finished product is cleaned, post-treatment protection is carried out; after the completion, cleaning and blow-drying are carried out.
Further, the hardness of the 24K hard gold plating layer is 120+/-20 HV.
Further, in step S6, the plating solution contains 300ml/L of a cylinder opener, 10-12g/L of gold, 50-60g/L of anhydrous sodium sulfite, 30ml/L of a stabilizer and the balance of deionized water.
Further, in step S6, the plating solution temperature is 55-65 ℃ and the current density is 0.1-0.6A/dm 2, and the plating time is set according to the thickness of the gold layer of 24K hard gold.
Further, the method also comprises a step S7, wherein the sulfite plating is used for carrying out the 18K rose gold electroplating operation on the surface of the 24K hard gold plating layer with the thickness of 0.1-0.5 microns.
Further, the hardness of the 18K rose gold plating layer is 300-350 HV.
Further, in step S7, the plating solution contains 300ml/L of a cylinder opener, 10-12g/L of gold, 1-3g/L of copper, 50-60g/L of anhydrous sodium sulfite, 10-15g/L of a copper complexing agent, 30ml/L of a stabilizer, 1g/L of a brightening agent and the balance of deionized water.
Further, in step S7, the temperature of the plating solution is 55-65 ℃ and the current density is 0.2-0.4A/dm 2, and the plating time is set according to the thickness of the gold layer of the 18K rose gold.
The improvement of the present application brings the following advantages: the method for plating the hard gold on the sulfite based on the silver substrate can be applied to plating 24K hard gold or 18K rose gold on silver ornaments. The process combines the advantages of rich style, exquisite manufacture, high quality, low price and the like of silver ornaments with the advantages of 24K hard gold, golden yellow and bright color, 18K rose gold, excellent corrosion resistance, excellent anti-discoloration capability and the like, and the obtained product has the characteristics of rich and various styles, strong anti-discoloration capability, moderate price and the like.
Drawings
FIG. 1 is a schematic diagram of the structure of a surface coating (24K hard gold) of jewelry (blank) prepared using the method of the examples of the present application.
FIG. 2 is a schematic diagram of the structure of a surface coating (18K rose gold) of jewelry (blank) prepared using the method of the examples of the present application.
Detailed Description
Other advantages and effects of the present invention will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present invention with reference to specific examples. The invention may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present invention.
Referring to fig. 1, a method for plating hard gold on a silver-based substrate by sulfite according to an embodiment of the present application includes the following steps:
s1, film stripping: soaking for 3-10 minutes by using a normal-temperature photoresist remover to remove a photoresist layer possibly covered on the surface of the silver substrate;
s2, acid washing: soaking for 5-20 seconds by using 3-5% of dilute sulfuric acid solution to remove an oxide layer;
s3, ultrasonic cleaning: the cleaning liquid is diluted wax removing water, and residues of film removal and foreign matters in sand holes are removed;
s4, electrolytic degreasing: electrolytic removal of foreign matters remained on the surface of the substrate by using a degreasing powder solution with the concentration of 3% -5%, wherein the temperature of the degreasing powder solution is 40-60 ℃, the current density is 2-3 ASD, and the degreasing time is 2-5 minutes;
s5, activating: using a mild activating acid salt solution with the concentration of 2% -6%, soaking for 5-20 seconds to neutralize the alkaline solution remained on the surface of the cleaned substrate and activate the surface of the substrate;
s6, after the surface of the substrate is cleaned, performing sulfite plating 24K hard gold operation:
s8, after the gold-plated finished product is cleaned, post-treatment protection is carried out; after the completion, cleaning and blow-drying are carried out.
The method can be applied to silver ornament gold plating. The silver substrate refers to full silver, silver alloy S925, or thick silver plating.
The method combines the advantages of rich style, exquisite manufacturing, high quality, low price and the like of silver ornaments with the color of 24K hard gold, excellent corrosion resistance, anti-tarnishing capability and the like, and the obtained product has the following characteristics: the paint has the advantages of rich and varied patterns, bright and rich color, strong anti-color change capability, good wear resistance and moderate price.
The hardness of the 24K hard gold plating layer is 120+/-20 HV.
In the step S6, the electroplating solution contains 300ml/L of a cylinder opener, 10-12g/L of gold, 50-60g/L of anhydrous sodium sulfite, 30ml/L of a stabilizer and the balance of deionized water.
In the step S6, the temperature of the electroplating solution is 55-65 ℃, the current density is 0.1-0.6A/dm < 2 >, and the electroplating time is set according to the thickness of the gold layer of 24K hard gold.
The sulfite is plated with 24K gold, the gold layer has high hardness, fine and compact crystal grains and good filling and covering capabilities, and most defects of the base material, such as pits 1 and sand holes 2 shown in fig. 1, can be shielded. The hole sealing and sealing treatment is carried out in the gold plating post-treatment, a protective layer can be formed on the surface of the gold layer, the color luster of the gold layer is not affected, but the air is isolated, and the color change can be delayed.
Referring to fig. 2, another embodiment of the present application provides a method for plating hard gold on a silver-based substrate by sulfite, comprising the steps of:
s1, film stripping: soaking for 3-10 minutes by using a normal-temperature photoresist remover to remove a photoresist layer possibly covered on the surface of the silver substrate;
s2, acid washing: soaking for 5-20 seconds by using 3-5% of dilute sulfuric acid solution to remove an oxide layer;
s3, ultrasonic cleaning: the cleaning liquid is diluted wax removing water, and residues of film removal and foreign matters in sand holes are removed;
s4, electrolytic degreasing: electrolytic removal of foreign matters remained on the surface of the substrate by using a degreasing powder solution with the concentration of 3% -5%, wherein the temperature of the degreasing powder solution is 40-60 ℃, the current density is 2-3 ASD, and the degreasing time is 2-5 minutes;
s5, activating: using a mild activating acid salt solution with the concentration of 2% -6%, soaking for 5-20 seconds to neutralize the alkaline solution remained on the surface of the cleaned substrate and activate the surface of the substrate;
s6, after the surface of the base material is cleaned, performing sulfite plating 24K hard gold operation, wherein the thickness of a gold layer is 0.1-0.5 micrometer:
s7, performing 18K rose gold electroplating operation on the surface of the 24K hard gold plating layer with the thickness of 0.1-0.5 microns by using sulfite plating
S8, after the gold-plated finished product is cleaned, post-treatment protection is carried out; after the completion, cleaning and blow-drying are carried out.
The 18K rose gold is plated on the basis of 24K hard gold, so that the color of the product is enriched, the hardness of the plating layer is higher, and the wear resistance is better.
The hardness of the 18K rose gold plating layer is 300-350 HV.
In the step S7, the electroplating solution contains 300ml/L of a cylinder opener, 10-12g/L of gold, 1-3g/L of copper, 50-60g/L of anhydrous sodium sulfite, 10-15g/L of a copper complexing agent, 30ml/L of a stabilizer, 1g/L of a brightening agent and the balance of deionized water.
In the step S7, the temperature of the electroplating solution is 55-65 ℃, the current density is 0.2-0.4A/dm < 2 >, and the electroplating time is set according to the thickness of the gold layer of the 18K rose gold.
Detailed description of the preferred embodiments
Example 1 the embryo is bright silver flake, sulphite electroplated 24K hard gold about 1 micron: the color is even yellow and bright. The quality test results are as follows:
1) 3% potassium sulfide solution soak test (color change area less than 1%): the time is more than or equal to 1H;
2) Neutral salt spray test: 48H has no abnormality;
3) Artificial sweat test: 48H was free of anomalies.
Example 2 the embryo was a matte silver ring, sulphite electroplated 24K hard gold about 2.5 microns: the color is even yellow and bright. The quality test results are as follows:
1) 3% potassium sulfide solution soak test (color change area less than 1%): the time is more than or equal to 1H;
2) Neutral salt spray test: 48H has no abnormality;
3) Artificial sweat test: 48H was free of anomalies.
Example 3 the embryo was bright silver flake, sulfite plated with 24K gold (about 0.2 microns) +sulfite plated with 18K rose gold (about 1 micron) ": rose red and uniform color. The quality test results are as follows:
1) 3% potassium sulfide solution soak test (color change area less than 1%): the time is more than or equal to 1H;
2) Neutral salt spray test: 48H was free of anomalies.
3) Artificial sweat test: 48H was free of anomalies.
The present invention is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present invention are intended to be included in the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.
Claims (8)
1. A method of sulphite hard gold plating based on a silver substrate, comprising the steps of:
s1, film stripping: soaking for 3-10 minutes by using a normal-temperature photoresist remover to remove a photoresist layer possibly covered on the surface of the silver substrate;
s2, acid washing: soaking for 5-20 seconds by using 3-5% of dilute sulfuric acid solution to remove an oxide layer;
s3, ultrasonic cleaning: the cleaning liquid is diluted wax removing water, and residues of film removal and foreign matters in sand holes are removed;
s4, electrolytic degreasing: electrolytic removal of foreign matters remained on the surface of the substrate by using a degreasing powder solution with the concentration of 3% -5%, wherein the temperature of the degreasing powder solution is 40-60 ℃, the current density is 2-3 ASD, and the degreasing time is 2-5 minutes;
s5, activating: using a mild activating acid salt solution with the concentration of 2% -6%, soaking for 5-20 seconds to neutralize the alkaline solution remained on the surface of the cleaned substrate and activate the surface of the substrate;
s6, after the surface of the substrate is cleaned, performing sulfite plating 24K hard gold operation:
s8, after the gold-plated finished product is cleaned, post-treatment protection is carried out; after the completion, cleaning and blow-drying are carried out.
2. The method of claim 1, wherein the 24K hard gold coating hardness is 120 ± 20HV.
3. The method according to claim 1, wherein in step S6, the plating solution contains 300ml/L of a cylinder opener, 10-12g/L of gold, 50-60g/L of anhydrous sodium sulfite, 30ml/L of a stabilizer, and the balance of deionized water.
4. A method according to claim 3, characterized in that in step S6, the plating bath temperature is 55-65 ℃, the current density is 0.1-0.6A/dm 2, and the plating time is set according to the thickness of the gold layer of 24K hard gold.
5. The method of claim 1, further comprising the step of S7, performing an 18K rose gold electroplating operation on a 24K hard gold plated surface of 0.1 to 0.5 microns thick using sulfite plating.
6. The method of claim 5, wherein the hardness of the 18K rose gold coating is 300 to 350HV.
7. The method according to claim 5, wherein in step S7, the plating solution contains 300ml/L of a cylinder opener, 10-12g/L of gold, 1-3g/L of copper, 50-60g/L of anhydrous sodium sulfite, 10-15g/L of a copper complexing agent, 30ml/L of a stabilizer, 1g/L of a brightening agent, and the balance of deionized water.
8. The method according to claim 7, wherein in step S7, the plating solution temperature is 55-65 ℃ and the current density is 0.2-0.4A/dm 2, and the plating time is set according to the gold layer thickness of 18K rose gold.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311756143.0A CN117737806A (en) | 2023-12-20 | 2023-12-20 | Method for plating hard gold on basis of sulfite of silver substrate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311756143.0A CN117737806A (en) | 2023-12-20 | 2023-12-20 | Method for plating hard gold on basis of sulfite of silver substrate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117737806A true CN117737806A (en) | 2024-03-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311756143.0A Pending CN117737806A (en) | 2023-12-20 | 2023-12-20 | Method for plating hard gold on basis of sulfite of silver substrate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117737806A (en) |
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2023
- 2023-12-20 CN CN202311756143.0A patent/CN117737806A/en active Pending
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