CN112921372A - Preparation method of zinc dipping solution - Google Patents
Preparation method of zinc dipping solution Download PDFInfo
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- CN112921372A CN112921372A CN201911242392.1A CN201911242392A CN112921372A CN 112921372 A CN112921372 A CN 112921372A CN 201911242392 A CN201911242392 A CN 201911242392A CN 112921372 A CN112921372 A CN 112921372A
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/34—Pretreatment of metallic surfaces to be electroplated
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Abstract
The invention discloses a preparation method of a zinc dipping solution, which comprises the following steps: (1) mixing zinc salt, nickel salt, fluoride, potassium pyrophosphate, a stabilizer and water to prepare a mixture M1; (2) mixing sodium gluconate, potassium tartrate, thiourea compounds, sodium carbonate, glycerol and water, and performing heat treatment to obtain a mixture M2; (3) mixing the mixture M1 and the mixture M2 to prepare a zinc dipping solution; the invention provides a preparation method of a zinc dipping solution, wherein the stabilizer is selected from tin methane sulfonate and/or ferrous sulfate, and a zinc dipping layer produced on the surface of a workpiece to be plated after the workpiece to be plated is dipped in the zinc dipping solution prepared by the method is thin, uniform and fine, and has high zinc content.
Description
Technical Field
The invention relates to the technical field of electroplating, in particular to a preparation method of a zinc dipping solution.
Background
In an electroplating process, in order to prevent a workpiece to be plated from being corroded by an electroplating solution when the workpiece to be plated directly enters the electroplating solution for electroplating, so that the surface of the workpiece to be plated is uneven, the bonding force between a substrate and a plating layer is reduced, and the subsequent processes are influenced, people usually place the workpiece to be plated in a zinc dipping solution for dipping before plating a metal layer on the workpiece to be plated, so that a zinc dipping layer which is fine, uniform, low in porosity, strong in bonding force, good in physical and chemical stability and capable of protecting the workpiece to be plated is obtained. The zinc dipping liquid commonly used at present is a mixture of zinc salt and pyrophosphate, but the zinc dipping layer on the surface of a workpiece to be plated after the zinc dipping liquid is used for treating is thicker and the zinc content in the zinc dipping layer is lower.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the method overcomes the defects of the prior art and provides the method for preparing the zinc dipping solution which is prepared by the method, and the zinc dipping layer produced on the surface of the workpiece to be plated is thin, uniform and fine and has higher zinc content after the workpiece to be plated is dipped by the zinc dipping solution.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a preparation method of a zinc dipping solution comprises the following steps: (1) mixing zinc salt, nickel salt, fluoride, potassium pyrophosphate, a stabilizer and water to prepare a mixture M1; (2) mixing sodium gluconate, potassium tartrate, thiourea compounds, sodium carbonate, glycerol and water, and performing heat treatment to obtain a mixture M2; (3) mixing the mixture M1 and the mixture M2 to prepare a zinc dipping solution; wherein the stabilizer is selected from tin methane sulfonate and/or ferrous sulfate;
the mass ratio of the components in the step (1) is 100 parts of zinc salt, 50-52 parts of nickel salt, 9-11 parts of fluoride, 15-17 parts of potassium pyrophosphate, 6-8 parts of stabilizer and 120-130 parts of water;
the mass ratio of the components in the step (2) is 100 parts of sodium gluconate, 65-67 parts of potassium tartrate, 40-42 parts of thiourea compound, 12-14 parts of sodium carbonate, 13-15 parts of glycerol and 150-160 parts of water.
Compared with the prior art, the invention has the following advantages: the zinc dipping solution provided by the invention is prepared by mixing zinc salt, nickel salt, fluoride, potassium pyrophosphate, a stabilizer and water to obtain a mixture M1, mixing sodium gluconate, potassium tartrate, thiourea compounds, sodium carbonate, glycerol and water, performing heat treatment to obtain a mixture M2, and finally mixing the mixture M1 with the mixture M2.
The zinc salt is selected from one or more of zinc sulfate, zinc chloride and zinc acetate.
The nickel salt is selected from one or more of nickel chloride, nickel sulfate and nickel nitrate.
The fluoride is sodium fluoride and/or potassium fluoride.
The thiourea compound is selected from one or more of dimethylthiourea, diphenylthiourea and thiosemicarbazide.
The conditions of the heat treatment are as follows: the heat treatment temperature is 50 ℃, and the heat treatment time is 4 h.
Detailed Description
The present invention will be further described with reference to the following embodiments.
A preparation method of a zinc dipping solution comprises the following steps: (1) mixing zinc salt, nickel salt, fluoride, potassium pyrophosphate, a stabilizer and water to prepare a mixture M1; (2) mixing sodium gluconate, potassium tartrate, thiourea compounds, sodium carbonate, glycerol and water, and performing heat treatment to obtain a mixture M2; (3) mixing the mixture M1 and the mixture M2 to prepare a zinc dipping solution; wherein the stabilizer is selected from tin methane sulfonate and/or ferrous sulfate;
the mass ratio of the components in the step (1) is 100 parts of zinc salt, 50-52 parts of nickel salt, 9-11 parts of fluoride, 15-17 parts of potassium pyrophosphate, 6-8 parts of stabilizer and 120-130 parts of water;
the mass ratio of the components in the step (2) is 100 parts of sodium gluconate, 65-67 parts of potassium tartrate, 40-42 parts of thiourea compound, 12-14 parts of sodium carbonate, 13-15 parts of glycerol and 150-160 parts of water.
Example one
A preparation method of a zinc dipping solution comprises the following steps: (1) mixing zinc salt, nickel salt, fluoride, potassium pyrophosphate, a stabilizer and water to prepare a mixture M1; (2) mixing sodium gluconate, potassium tartrate, thiourea compounds, sodium carbonate, glycerol and water, and performing heat treatment to obtain a mixture M2; (3) mixing the mixture M1 and the mixture M2 to prepare a zinc dipping solution; wherein the stabilizer is selected from tin methane sulfonate and/or ferrous sulfate;
the mass ratio of the components in the step (1) is 100 parts of zinc salt, 50 parts of nickel salt, 9 parts of fluoride, 15 parts of potassium pyrophosphate, 6 parts of stabilizer and 120 parts of water;
the mass ratio of the components in the step (2) is 100 parts of sodium gluconate, 65 parts of potassium tartrate, 40 parts of thiourea compound, 12 parts of sodium carbonate, 13 parts of glycerol and 150 parts of water.
Example two
A preparation method of a zinc dipping solution comprises the following steps: (1) mixing zinc salt, nickel salt, fluoride, potassium pyrophosphate, a stabilizer and water to prepare a mixture M1; (2) mixing sodium gluconate, potassium tartrate, thiourea compounds, sodium carbonate, glycerol and water, and performing heat treatment to obtain a mixture M2; (3) mixing the mixture M1 and the mixture M2 to prepare a zinc dipping solution; wherein the stabilizer is selected from tin methane sulfonate and/or ferrous sulfate;
the mass ratio of the components in the step (1) is 100 parts of zinc salt, 51 parts of nickel salt, 10 parts of fluoride, 16 parts of potassium pyrophosphate, 7 parts of stabilizer and 125 parts of water;
the mass ratio of the components in the step (2) is 100 parts of sodium gluconate, 66 parts of potassium tartrate, 41 parts of thiourea compound, 13 parts of sodium carbonate, 14 parts of glycerol and 155 parts of water.
EXAMPLE III
A preparation method of a zinc dipping solution comprises the following steps: (1) mixing zinc salt, nickel salt, fluoride, potassium pyrophosphate, a stabilizer and water to prepare a mixture M1; (2) mixing sodium gluconate, potassium tartrate, thiourea compounds, sodium carbonate, glycerol and water, and performing heat treatment to obtain a mixture M2; (3) mixing the mixture M1 and the mixture M2 to prepare a zinc dipping solution; wherein the stabilizer is selected from tin methane sulfonate and/or ferrous sulfate;
the mass ratio of the components in the step (1) is 100 parts of zinc salt, 52 parts of nickel salt, 11 parts of fluoride, 17 parts of potassium pyrophosphate, 8 parts of stabilizer and 130 parts of water;
the mass ratio of the components in the step (2) is 100 parts of sodium gluconate, 67 parts of potassium tartrate, 42 parts of thiourea compound, 14 parts of sodium carbonate, 15 parts of glycerol and 160 parts of water.
Compared with the prior art, the invention has the following advantages: the zinc dipping solution provided by the invention is prepared by mixing zinc salt, nickel salt, fluoride, potassium pyrophosphate, a stabilizer and water to obtain a mixture M1, mixing sodium gluconate, potassium tartrate, thiourea compounds, sodium carbonate, glycerol and water, performing heat treatment to obtain a mixture M2, and finally mixing the mixture M1 with the mixture M2, wherein the fluoride, potassium pyrophosphate, sodium gluconate, potassium tartrate, thiourea compounds, sodium carbonate and glycerol are added in the preparation process, and the seven components have synergistic effect, so that a zinc dipping layer produced on the surface of a workpiece to be plated after the workpiece to be plated is dipped in the prepared zinc dipping solution is thin, uniform and fine, the zinc content is high, and the ratio of the mixture M1 to the mixture M2 is 1: 3.
The present invention is not limited to the above-described embodiments, and various modifications and variations of the present invention are intended to be included within the scope of the claims and the equivalent technology of the present invention if they do not depart from the spirit and scope of the present invention.
Claims (6)
1. A preparation method of a zinc dipping solution is characterized by comprising the following steps: the preparation method comprises the following steps: (1) mixing zinc salt, nickel salt, fluoride, potassium pyrophosphate, a stabilizer and water to prepare a mixture M1; (2) mixing sodium gluconate, potassium tartrate, thiourea compounds, sodium carbonate, glycerol and water, and performing heat treatment to obtain a mixture M2; (3) mixing the mixture M1 and the mixture M2 to prepare a zinc dipping solution; wherein the stabilizer is selected from tin methane sulfonate and/or ferrous sulfate;
the mass ratio of the components in the step (1) is 100 parts of zinc salt, 50-52 parts of nickel salt, 9-11 parts of fluoride, 15-17 parts of potassium pyrophosphate, 6-8 parts of stabilizer and 120-130 parts of water;
the mass ratio of the components in the step (2) is 100 parts of sodium gluconate, 65-67 parts of potassium tartrate, 40-42 parts of thiourea compound, 12-14 parts of sodium carbonate, 13-15 parts of glycerol and 150-160 parts of water.
2. The method for preparing a zincating composition according to claim 1, wherein: the zinc salt is selected from one or more of zinc sulfate, zinc chloride and zinc acetate.
3. The method for preparing a zincating composition according to claim 2, wherein: the nickel salt is selected from one or more of nickel chloride, nickel sulfate and nickel nitrate.
4. The method for preparing a zincating composition according to claim 1, wherein: the fluoride is sodium fluoride and/or potassium fluoride.
5. The method for preparing a zincating composition according to claim 1, wherein: the thiourea compound is selected from one or more of dimethylthiourea, diphenylthiourea and thiosemicarbazide.
6. The method for preparing a zincating composition according to claim 1, wherein: the conditions of the heat treatment are as follows: the heat treatment temperature is 50 ℃, and the heat treatment time is 4 h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911242392.1A CN112921372A (en) | 2019-12-06 | 2019-12-06 | Preparation method of zinc dipping solution |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911242392.1A CN112921372A (en) | 2019-12-06 | 2019-12-06 | Preparation method of zinc dipping solution |
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| Publication Number | Publication Date |
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| CN112921372A true CN112921372A (en) | 2021-06-08 |
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| CN201911242392.1A Pending CN112921372A (en) | 2019-12-06 | 2019-12-06 | Preparation method of zinc dipping solution |
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| CN (1) | CN112921372A (en) |
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2019
- 2019-12-06 CN CN201911242392.1A patent/CN112921372A/en active Pending
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Application publication date: 20210608 |
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| WD01 | Invention patent application deemed withdrawn after publication |