CN116926550A - Cyanide-free environment-friendly stripping agent and preparation method and application method thereof - Google Patents
Cyanide-free environment-friendly stripping agent and preparation method and application method thereof Download PDFInfo
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- CN116926550A CN116926550A CN202310878565.9A CN202310878565A CN116926550A CN 116926550 A CN116926550 A CN 116926550A CN 202310878565 A CN202310878565 A CN 202310878565A CN 116926550 A CN116926550 A CN 116926550A
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- CN
- China
- Prior art keywords
- agent
- solution
- stripping
- coating
- deplating
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- 238000000034 method Methods 0.000 title claims abstract description 12
- 238000002360 preparation method Methods 0.000 title abstract description 5
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 28
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 24
- 238000000576 coating method Methods 0.000 claims abstract description 18
- 239000011248 coating agent Substances 0.000 claims abstract description 16
- VKYKSIONXSXAKP-UHFFFAOYSA-N hexamethylenetetramine Chemical compound C1N(C2)CN3CN1CN2C3 VKYKSIONXSXAKP-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000008367 deionised water Substances 0.000 claims abstract description 10
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 10
- ATRRKUHOCOJYRX-UHFFFAOYSA-N Ammonium bicarbonate Chemical compound [NH4+].OC([O-])=O ATRRKUHOCOJYRX-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000001099 ammonium carbonate Substances 0.000 claims abstract description 9
- 235000012501 ammonium carbonate Nutrition 0.000 claims abstract description 9
- PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical compound NCCN PIICEJLVQHRZGT-UHFFFAOYSA-N 0.000 claims abstract description 8
- 235000010299 hexamethylene tetramine Nutrition 0.000 claims abstract description 8
- 239000004312 hexamethylene tetramine Substances 0.000 claims abstract description 8
- 229910000403 monosodium phosphate Inorganic materials 0.000 claims abstract description 8
- 235000019799 monosodium phosphate Nutrition 0.000 claims abstract description 8
- 239000001508 potassium citrate Substances 0.000 claims abstract description 8
- 229960002635 potassium citrate Drugs 0.000 claims abstract description 8
- QEEAPRPFLLJWCF-UHFFFAOYSA-K potassium citrate (anhydrous) Chemical compound [K+].[K+].[K+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O QEEAPRPFLLJWCF-UHFFFAOYSA-K 0.000 claims abstract description 8
- 235000011082 potassium citrates Nutrition 0.000 claims abstract description 8
- AJPJDKMHJJGVTQ-UHFFFAOYSA-M sodium dihydrogen phosphate Chemical compound [Na+].OP(O)([O-])=O AJPJDKMHJJGVTQ-UHFFFAOYSA-M 0.000 claims abstract description 8
- 239000001488 sodium phosphate Substances 0.000 claims abstract description 8
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 claims abstract description 8
- 229910000406 trisodium phosphate Inorganic materials 0.000 claims abstract description 8
- 235000019801 trisodium phosphate Nutrition 0.000 claims abstract description 8
- 238000004140 cleaning Methods 0.000 claims description 3
- 235000011121 sodium hydroxide Nutrition 0.000 claims description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 abstract description 14
- 229910052759 nickel Inorganic materials 0.000 abstract description 7
- 229910052802 copper Inorganic materials 0.000 abstract description 4
- 239000010949 copper Substances 0.000 abstract description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract description 3
- 229910000990 Ni alloy Inorganic materials 0.000 abstract description 3
- 239000007788 liquid Substances 0.000 abstract description 3
- QELJHCBNGDEXLD-UHFFFAOYSA-N nickel zinc Chemical compound [Ni].[Zn] QELJHCBNGDEXLD-UHFFFAOYSA-N 0.000 abstract description 3
- 239000000126 substance Substances 0.000 abstract description 3
- 231100000252 nontoxic Toxicity 0.000 abstract description 2
- 230000003000 nontoxic effect Effects 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 8
- 229910001172 neodymium magnet Inorganic materials 0.000 description 8
- QJVKUMXDEUEQLH-UHFFFAOYSA-N [B].[Fe].[Nd] Chemical compound [B].[Fe].[Nd] QJVKUMXDEUEQLH-UHFFFAOYSA-N 0.000 description 6
- 238000007747 plating Methods 0.000 description 6
- KXZJHVJKXJLBKO-UHFFFAOYSA-N chembl1408157 Chemical compound N=1C2=CC=CC=C2C(C(=O)O)=CC=1C1=CC=C(O)C=C1 KXZJHVJKXJLBKO-UHFFFAOYSA-N 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- -1 neodymium iron boron rare earth Chemical class 0.000 description 3
- 239000008139 complexing agent Substances 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009713 electroplating Methods 0.000 description 2
- 239000003112 inhibitor Substances 0.000 description 2
- 229910052761 rare earth metal Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F1/00—Etching metallic material by chemical means
- C23F1/44—Compositions for etching metallic material from a metallic material substrate of different composition
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Paints Or Removers (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
The invention is suitable for the technical field of coating, and provides a cyanide-free environment-friendly deplating agent, a preparation method and a use method thereof, wherein the deplating agent comprises 1-5 wt% of ammonium carbonate, 5-10 wt% of sodium dihydrogen phosphate or trisodium phosphate, 1-5 wt% of sodium hydroxide, 10-15 wt% of potassium citrate, 5-10 wt% of aminotriethanol, 15-20 wt% of hexamethylenetetramine or ethylenediamine and 40-50 wt% of deionized water based on the total weight of the deplating agent; the stripping agent can simultaneously remove the nickel coating, the copper coating, the zinc-nickel alloy coating and the chemical nickel coating, does not need to be provided with different stripping liquids to remove different coatings like the traditional process, and is environment-friendly and nontoxic.
Description
Technical Field
The invention belongs to the technical field of coating, and particularly relates to a cyanide-free environment-friendly stripping agent, and a preparation method and a use method thereof.
Background
Along with the development of neodymium iron boron rare earth permanent magnet materials, the application of the neodymium iron boron rare earth permanent magnet materials in the industries of electronic products, automobile fields, medical appliances and the like is more and more widely, the reworking and deplating of defective products after neodymium iron boron electroplating also becomes a hot trend, and conventional neodymium iron boron electroplating is divided into nickel plating, copper plating, zinc-nickel alloy plating, chemical nickel plating and the like.
In the prior art, sodium cyanide is used as a main material of a stripping solution, and different materials are added according to the difference of plating types to strip the corresponding plating layers. Sodium cyanide belongs to a highly toxic dangerous article, and is used as a main raw material for deplating, so that serious harm is caused to human bodies and the environment, and waste liquid after deplating is not well treated. The stripping solution prepared by sodium cyanide needs to be used at a high temperature of 90 ℃ to greatly consume energy, and causes a certain degree of damage to the base material and performance of the neodymium-iron-boron permanent magnet to reduce the qualification rate of the stripping product.
Disclosure of Invention
The embodiment of the invention aims to provide a cyanide-free environment-friendly stripping agent and aims to solve the problems in the background technology.
The first aspect of the invention provides a cyanide-free environment-friendly stripping agent, which comprises 1-5 wt% of ammonium carbonate, 5-10 wt% of sodium dihydrogen phosphate or trisodium phosphate, 1-5 wt% of sodium hydroxide, 10-15 wt% of potassium citrate, 5-10 wt% of aminotriethanol, 15-20 wt% of hexamethylenetetramine or ethylenediamine and 40-50 wt% of deionized water based on the total weight of the stripping agent.
The second aspect of the present invention provides a method for preparing the above-mentioned stripping agent, which comprises:
s1, mixing deionized water with hexamethylenetetramine or ethylenediamine to form a solution a;
s2, mixing deionized water with ammonium carbonate, sodium dihydrogen phosphate or trisodium phosphate, sodium hydroxide and potassium citrate to form a solution b;
s3, mixing the solution a in S1 and the solution b in S2 to form a solution c
And S4, mixing the solution c in the step S3 with aminotriethanol to prepare the deplating agent.
A third aspect of the present invention provides a stripping method of the above stripping agent, comprising: immersing the product to be reworked and deplated in a deplating agent, wherein the deplating time is 5-180min according to the thickness of the product coating, and cleaning by using ultrasonic waves after the surface coating of the product is completely removed.
Compared with the prior art, the invention has the beneficial effects that: the stripping agent can simultaneously remove the nickel coating, the copper coating, the zinc-nickel alloy coating and the chemical nickel coating, does not need to be provided with different stripping liquids to remove different coatings like the traditional process, and is environment-friendly and nontoxic.
Drawings
FIG. 1 is a comparative table of stripping effect of a cyanide-free environmental stripping agent provided by the present invention.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Specific implementations of the invention are described in detail below in connection with specific embodiments.
As shown in fig. 1, the invention provides a cyanide-free environment-friendly stripping agent, which comprises 1-5 wt% of ammonium carbonate, 5-10 wt% of sodium dihydrogen phosphate or trisodium phosphate, 1-5 wt% of sodium hydroxide, 10-15 wt% of potassium citrate, 5-10 wt% of aminotriethanol, 15-20 wt% of hexamethylenetetramine or ethylenediamine and 40-50 wt% of deionized water based on the total weight of the stripping agent.
In this embodiment, the hexamethylenetetramine or ethylenediamine is a stable complexing agent for nickel and copper metals, and has good adsorption slow release property on neodymium-iron-boron materials, and potassium citrate is added as a complexing agent to achieve higher stripping efficiency;
the sodium dihydrogen phosphate or trisodium phosphate serving as a corrosion inhibitor has the function of stabilizing the PH value of the stripping agent, plays a role in resisting corrosion of metal of the neodymium-iron-boron material, ensures that the surface of the neodymium-iron-boron material is not corroded, and the sodium hydroxide serving as the corrosion inhibitor plays an alkaline buffering role in the stripping solution, so that the service life of the stripping solution is prolonged;
the ammonium carbonate and the aminotriethanol are used as the surfactant, and the effect of the ammonium carbonate and the aminotriethanol is to effectively resist oxidation of the metal surface, so that the deplating efficiency is improved.
The invention also provides a preparation method of the deplating agent, which comprises the following steps:
s1, mixing deionized water with hexamethylenetetramine or ethylenediamine to form a solution a;
s2, mixing deionized water with ammonium carbonate, sodium dihydrogen phosphate or trisodium phosphate, sodium hydroxide and potassium citrate to form a solution b;
s3, mixing the solution a in S1 and the solution b in S2 to form a solution c
And S4, mixing the solution c in the step S3 with aminotriethanol to prepare the deplating agent.
The invention also provides a stripping method of the stripping agent, which comprises the following steps: immersing the product to be reworked and deplated in a deplating agent, wherein the deplating time is 5-180min according to the thickness of the product coating, and cleaning by using ultrasonic waves after the surface coating of the product is completely removed.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (3)
1. The cyanide-free environment-friendly stripping agent is characterized by comprising 1-5 wt% of ammonium carbonate, 5-10 wt% of sodium dihydrogen phosphate or trisodium phosphate, 1-5 wt% of sodium hydroxide, 10-15 wt% of potassium citrate, 5-10 wt% of aminotriethanol, 15-20 wt% of hexamethylenetetramine or ethylenediamine and 40-50 wt% of deionized water based on the total weight of the stripping agent.
2. A method of preparing the stripping agent of claim 1, comprising:
s1, mixing deionized water with hexamethylenetetramine or ethylenediamine to form a solution a;
s2, mixing deionized water with ammonium carbonate, sodium dihydrogen phosphate or trisodium phosphate, sodium hydroxide and potassium citrate to form a solution b;
s3, mixing the solution a in S1 and the solution b in S2 to form a solution c
And S4, mixing the solution c in the step S3 with aminotriethanol to prepare the deplating agent.
3. A stripping method using the stripping agent as claimed in claim 1, characterized in that the method comprises: immersing the product to be reworked and deplated in a deplating agent, wherein the deplating time is 5-180min according to the thickness of the product coating, and cleaning by using ultrasonic waves after the surface coating of the product is completely removed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310878565.9A CN116926550A (en) | 2023-07-17 | 2023-07-17 | Cyanide-free environment-friendly stripping agent and preparation method and application method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310878565.9A CN116926550A (en) | 2023-07-17 | 2023-07-17 | Cyanide-free environment-friendly stripping agent and preparation method and application method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116926550A true CN116926550A (en) | 2023-10-24 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310878565.9A Pending CN116926550A (en) | 2023-07-17 | 2023-07-17 | Cyanide-free environment-friendly stripping agent and preparation method and application method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116926550A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5035744A (en) * | 1989-07-12 | 1991-07-30 | Kojima Chemicals Co., Ltd. | Electroless gold plating solution |
| CN101880882A (en) * | 2010-07-01 | 2010-11-10 | 中国科学院宁波材料技术与工程研究所 | Stripping solution for sintered neodymium-iron-boron surface aluminum coating |
| CN102234834A (en) * | 2010-04-20 | 2011-11-09 | 深圳富泰宏精密工业有限公司 | Electrolytic stripping liquid, and method for removing titanium-containing film by using electrolytic stripping liquid |
-
2023
- 2023-07-17 CN CN202310878565.9A patent/CN116926550A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5035744A (en) * | 1989-07-12 | 1991-07-30 | Kojima Chemicals Co., Ltd. | Electroless gold plating solution |
| CN102234834A (en) * | 2010-04-20 | 2011-11-09 | 深圳富泰宏精密工业有限公司 | Electrolytic stripping liquid, and method for removing titanium-containing film by using electrolytic stripping liquid |
| CN101880882A (en) * | 2010-07-01 | 2010-11-10 | 中国科学院宁波材料技术与工程研究所 | Stripping solution for sintered neodymium-iron-boron surface aluminum coating |
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