CN112080786A - Metal surface layer heterochromatic depth reduction liquid and reduction method - Google Patents
Metal surface layer heterochromatic depth reduction liquid and reduction method Download PDFInfo
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- CN112080786A CN112080786A CN202010934625.0A CN202010934625A CN112080786A CN 112080786 A CN112080786 A CN 112080786A CN 202010934625 A CN202010934625 A CN 202010934625A CN 112080786 A CN112080786 A CN 112080786A
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
- C25F1/00—Electrolytic cleaning, degreasing, pickling or descaling
- C25F1/02—Pickling; Descaling
- C25F1/04—Pickling; Descaling in solution
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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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- 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
- C25D5/36—Pretreatment of metallic surfaces to be electroplated of iron or steel
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
- C25F1/00—Electrolytic cleaning, degreasing, pickling or descaling
- C25F1/02—Pickling; Descaling
- C25F1/04—Pickling; Descaling in solution
- C25F1/06—Iron or steel
Abstract
The invention discloses a metal surface layer heterochromous deep reducing solution which comprises the following components in percentage by mass: 51-55% of phosphoric acid, 42-46% of sulfuric acid and 1-5% of brightener. Also discloses a method for deeply reducing the different colors on the metal surface layer, which comprises the steps of processing a scrapped workpiece, preparing a reducing solution, electrolyzing, grinding and the like. The metal surface heterochrosis deep reducing solution can be directly used as an electrolyte, and a metal workpiece is placed in the reducing solution, so that heterochrosis, rust and residues on the metal surface can be effectively removed, the metal surface heterochrosis, rust and residues are reduced to the natural color of the metal, and the reducing solution is particularly suitable for reducing metal parts with complex geometric structures and small sizes, and is high in speed and efficiency; the reduced metal parts are electroplated, so that the binding force between the base material and the coating can be improved, and the quality of the coating is improved. The reduction method has simple process, high speed and high efficiency, and can effectively reduce the rejection rate, reduce the loss and save the cost.
Description
Technical Field
The invention relates to the technical field of electrolysis, in particular to a metal surface layer heterochromatic deep reduction solution and a reduction method.
Background
In the industry, technology is developed day by day, upgrading and upgrading are frequent, and a large number of new products are launched almost every month, which becomes a hot spot field of product design.
In the production of precision electronic products, for some metal parts which have complete appearance and only have surface layer heterochrosis, rust or residues on the surface, especially metal parts with complex geometric structures and small sizes, the metal parts are generally directly used as defective products and are completely thrown into a scrapped bin, so that the metal parts are more accumulated, serious loss is caused, and great economic loss is brought.
Disclosure of Invention
The invention aims to provide a metal surface layer color depth reducing solution and a metal surface layer color depth reducing method, which can solve at least one of the problems.
According to one aspect of the invention, the invention provides a metal surface layer heterochromatic deep reduction solution, which comprises the following components in percentage by mass: 51-55% of phosphoric acid, 42-46% of sulfuric acid and 1-5% of brightener.
Therefore, the metal surface layer heterochromous deep reducing solution can be directly used as an electrolyte, and a metal workpiece is placed in the reducing solution, so that heterochromous, rusty stains and residues on the metal surface layer can be effectively removed, the metal surface layer heterochromous, rusty stains and residues are reduced to the original color of the metal, and the reducing solution is particularly suitable for reducing metal parts with complex geometric structures and small sizes, and is high in speed and efficiency; the reduced metal parts are electroplated, so that the binding force between the base material and the coating can be improved, and the quality of the coating is improved.
In some embodiments, the phosphoric acid is 85% specific gravity 1.7 phosphoric acid.
In some embodiments, the sulfuric acid is 98% sulfuric acid having a specific gravity of 1.84.
According to another aspect of the present invention, there is provided a method for reducing the color depth of a metal surface layer, comprising the steps of:
s1, processing the discarded workpiece: the scrapped workpiece is baked at high temperature to remove the viscosity of glue;
s2, preparation of reducing solution: the preparation method comprises the following components in percentage by mass: mixing 51-55% of phosphoric acid, 42-46% of sulfuric acid and 1-5% of brightener to obtain a reducing solution;
s3, electrolysis: using the reducing solution prepared in the step S2 as an electrolyte, and placing the scrapped workpiece baked at the high temperature in the step S1 in the electrolyte for electrolysis;
s4, grinding: and grinding the workpiece electrolyzed in the step S3 to obtain a new workpiece.
The reduction method directly uses the metal surface heterochromous deep reduction solution as electrolyte, places the metal workpiece which is baked at high temperature and has the glue viscosity removed in the reduction solution for electrolysis, removes heterochromous, rusty and residues on the surface of the product, and then grinds and polishes the electrolyzed metal workpiece to obtain a brand new product, thereby meeting the requirements of assembly and shipment appearance. The reduction method has simple process, high speed and high efficiency, and can effectively reduce the rejection rate, reduce the loss and save the cost.
In some embodiments, in step S2, the electrolysis temperature is 55-80 ℃, the rectified voltage is 7-9V, and the current density is 8-15A/dm2。
In some embodiments, in step S2, the reducing liquor is configured by:
s201, mixing, stirring and dissolving phosphoric acid and sulfuric acid uniformly to obtain mixed acid liquor;
s202, adding a brightening agent into the mixed acid liquor prepared in the step S201, and stirring and dissolving uniformly.
In some embodiments, in step S1, the high temperature baking temperature is 500 ℃.
In some embodiments, step S1 and step S2 are interchangeable.
The invention has the beneficial effects that:
the metal surface heterochrosis deep reducing solution can be directly used as an electrolyte, and a metal workpiece is placed in the reducing solution, so that heterochrosis, rust and residues on the metal surface can be effectively removed, the metal surface heterochrosis, rust and residues are reduced to the natural color of the metal, and the reducing solution is particularly suitable for reducing metal parts with complex geometric structures and small sizes, and is high in speed and efficiency; the reduced metal parts are electroplated, so that the binding force between the base material and the coating can be improved, and the quality of the coating is improved.
The reduction method directly uses the metal surface heterochromous deep reduction solution as electrolyte, places the metal workpiece which is baked at high temperature and has the glue viscosity removed in the reduction solution for electrolysis, removes heterochromous, rusty and residues on the surface of the product, and then grinds and polishes the electrolyzed metal workpiece to obtain a brand new product, thereby meeting the requirements of assembly and shipment appearance. The reduction method has simple process, high speed and high efficiency, and can effectively reduce the rejection rate, reduce the loss and save the cost.
Detailed Description
The present invention will be described in further detail with reference to examples.
The metallic surface layer heterochromatic depth reducing solution comprises the following components in percentage by mass: 51-55% of phosphoric acid, 42-46% of sulfuric acid and 1-5% of brightener.
The phosphoric acid content is 85%, and the specific gravity is 1.7.
The sulfuric acid content is 98%, and the specific gravity is 1.84.
The brightener is a commercially available PR022 type brightening additive.
The metal surface heterochrosis deep reducing solution can be directly used as an electrolyte, and a metal workpiece is placed in the reducing solution, so that heterochrosis, rust and residues on the metal surface can be effectively removed, the metal surface heterochrosis, rust and residues are reduced to the natural color of the metal, and the reducing solution is particularly suitable for reducing metal parts with complex geometric structures and small sizes, and is high in speed and efficiency; the reduced metal parts are electroplated, so that the binding force between the base material and the coating can be improved, and the quality of the coating is improved.
A method for reducing the different colors and depths of a metal surface layer comprises the following steps:
s1, processing the discarded workpiece: the scrapped workpiece is baked at high temperature to remove the viscosity of glue;
in this step, the scrapped workpiece is a stainless steel metal piece made of SUS 316L. The main chemical components and contents are approximately: c, carbon C: less than or equal to 0.030; silicon Si: less than or equal to 1.00; manganese Mn: less than or equal to 2.00; s, sulfur: less than or equal to 0.030; phosphorus P: less than or equal to 0.045; chromium Cr: 16.00 to 18.00; nickel Ni: 10.00-14.00; molybdenum Mo: 2.00 to 3.00.
The high-temperature baking temperature can be 500 ℃, and baking is carried out through equipment such as a drying box.
S2, preparation of reducing solution: the preparation method comprises the following components in percentage by mass: mixing 51-55% of phosphoric acid, 42-46% of sulfuric acid and 1-5% of brightener to obtain a reducing solution;
in this step, the reducing solution is prepared by the following steps:
s201, mixing, stirring and dissolving phosphoric acid and sulfuric acid uniformly to obtain mixed acid liquor;
s202, adding a brightening agent into the mixed acid liquor prepared in the step S201, and stirring and dissolving uniformly.
S3, electrolysis: using the reducing solution prepared in the step S2 as an electrolyte, and placing the scrapped workpiece baked at the high temperature in the step S1 in the electrolyte for electrolysis;
in the step, the working temperature of electrolysis is 55-80 ℃, the rectified voltage is 7-9V, and the current density is 8-15A/dm2。
S4, grinding: and grinding the workpiece electrolyzed in the step S3 to obtain a new workpiece.
In the step, the grinding times can be selected according to actual needs, and the grinding times can be reused after two times of grinding.
In this embodiment, the steps S1 and S2 may be interchanged, that is, the high-temperature baking treatment of the scrapped workpiece may be performed after the reducing solution is prepared.
The reduction method directly uses the metal surface heterochromous deep reduction solution as electrolyte, places the metal workpiece which is baked at high temperature and has the glue viscosity removed in the reduction solution for electrolysis, removes heterochromous, rusty and residues on the surface of the product, and then grinds and polishes the electrolyzed metal workpiece to obtain a brand new product, thereby meeting the requirements of assembly and shipment appearance. The reduction method has simple process, high speed and high efficiency, and can effectively reduce the rejection rate, reduce the loss and save the cost.
Example 1
The metallic surface heterochromatic deep reduction solution comprises the following components in percentage by mass: 55% of phosphoric acid, 42% of sulfuric acid and 3% of brightener.
A method for reducing the different colors and depths of a metal surface layer comprises the following steps:
s1, processing the discarded workpiece: the scrapped workpiece is baked at high temperature to remove the viscosity of glue;
in this step, the scrapped workpiece is a stainless steel metal piece made of SUS 316L.
The high-temperature baking temperature is 500 ℃, and the baking is carried out through equipment such as a drying oven.
S2, preparation of reducing solution: mixing 55% phosphoric acid and 42% sulfuric acid, stirring, and dissolving to obtain mixed acid solution; and adding 3% of brightener into the mixed acid solution, stirring and dissolving uniformly to obtain a reducing solution.
S3, electrolysis: using the reducing solution prepared in the step S2 as an electrolyte, and placing the scrapped workpiece baked at the high temperature in the step S1 in the electrolyte for electrolysis;
in this step, the operating temperature of the electrolysis was 70 ℃, the rectified voltage was 8V, and the current density was 15A/dm2。
S4, grinding: and grinding the workpiece electrolyzed in the step S3 to obtain a new workpiece.
Example 2
The metallic surface heterochromatic deep reduction solution comprises the following components in percentage by mass: 51% of phosphoric acid, 46% of sulfuric acid and 3% of brightener.
A method for reducing the different colors and depths of a metal surface layer comprises the following steps:
s1, processing the discarded workpiece: the scrapped workpiece is baked at high temperature to remove the viscosity of glue;
in this step, the scrapped workpiece is a stainless steel metal piece made of SUS 316L.
The high-temperature baking temperature is 500 ℃, and the baking is carried out through equipment such as a drying oven.
S2, preparation of reducing solution: mixing and stirring 51% phosphoric acid and 46% sulfuric acid, and dissolving uniformly to obtain mixed acid liquor; and adding 3% of brightener into the mixed acid solution, stirring and dissolving uniformly to obtain a reducing solution.
S3, electrolysis: using the reducing solution prepared in the step S2 as an electrolyte, and placing the scrapped workpiece baked at the high temperature in the step S1 in the electrolyte for electrolysis;
in this step, the operating temperature of the electrolysis was 60 ℃, the rectified voltage was 9V, and the current density was 10A/dm2。
S4, grinding: and grinding the workpiece electrolyzed in the step S3 to obtain a new workpiece.
Example 3
The metallic surface heterochromatic deep reduction solution comprises the following components in percentage by mass: 53 percent of phosphoric acid, 43 percent of sulfuric acid and 4 percent of brightener.
A method for reducing the different colors and depths of a metal surface layer comprises the following steps:
s1, processing the discarded workpiece: the scrapped workpiece is baked at high temperature to remove the viscosity of glue;
in this step, the scrapped workpiece is a stainless steel metal piece made of SUS 316L.
The high-temperature baking temperature is 500 ℃, and the baking is carried out through equipment such as a drying oven.
S2, preparation of reducing solution: mixing 53% phosphoric acid and 43% sulfuric acid, stirring, and dissolving uniformly to obtain mixed acid liquor; and adding 4% of brightener into the mixed acid solution, stirring and dissolving uniformly to obtain a reducing solution.
S3, electrolysis: using the reducing solution prepared in the step S2 as an electrolyte, and placing the scrapped workpiece baked at the high temperature in the step S1 in the electrolyte for electrolysis;
in this step, the operating temperature of electrolysis was 80 ℃, the rectified voltage was 7V, and the current density was 10A/dm2。
S4, grinding: and grinding the workpiece electrolyzed in the step S3 to obtain a new workpiece.
What has been described above are merely some embodiments of the present invention. It will be apparent to those skilled in the art that various changes and modifications can be made without departing from the inventive concept thereof, and these changes and modifications can be made without departing from the spirit and scope of the invention.
Claims (8)
1. The reducing liquid for the different color depth of the metal surface layer is characterized by comprising the following components in percentage by mass: 51-55% of phosphoric acid, 42-46% of sulfuric acid and 1-5% of brightener.
2. The reducing solution according to claim 1, wherein the phosphoric acid is 85% phosphoric acid with a specific gravity of 1.7.
3. The reducing solution according to claim 1, wherein the sulfuric acid is sulfuric acid with a content of 98% and a specific gravity of 1.84.
4. The method for reducing the different colors and the depths of the metal surface layer is characterized by comprising the following steps of:
s1, processing the discarded workpiece: the scrapped workpiece is baked at high temperature to remove the viscosity of glue;
s2, preparation of reducing solution: the preparation method comprises the following components in percentage by mass: mixing 51-55% of phosphoric acid, 42-46% of sulfuric acid and 1-5% of brightener to obtain a reducing solution;
s3, electrolysis: using the reducing solution prepared in the step S2 as an electrolyte, and placing the scrapped workpiece baked at the high temperature in the step S1 in the electrolyte for electrolysis;
s4, grinding: and grinding the workpiece electrolyzed in the step S3 to obtain a new workpiece.
5. The method of claim 4, wherein in step S2, the electrolysis temperature is 55-80 ℃, the rectified voltage is 7-9V, and the current density is 8-15A/dm2。
6. The method of claim 4, wherein in step S2, the reducing solution is prepared by:
s201, mixing, stirring and dissolving phosphoric acid and sulfuric acid uniformly to obtain mixed acid liquor;
s202, adding a brightening agent into the mixed acid liquor prepared in the step S201, and stirring and dissolving uniformly.
7. The method of claim 4, wherein the high temperature baking temperature in step S1 is 500 ℃.
8. The method of claim 4, wherein the steps S1 and S2 are interchangeable.
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| CN109848142A (en) * | 2019-02-15 | 2019-06-07 | 深圳市玖品空气净化科技有限公司 | A kind of new electronic component of electronic device manufacture field removes adhesive dispenser |
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- 2020-09-08 CN CN202010934625.0A patent/CN112080786A/en active Pending
Patent Citations (7)
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| CN101397689A (en) * | 2008-10-30 | 2009-04-01 | 常州星海半导体器件有限公司 | Removal method of oil, wax and residual gum on diode surface |
| CN103608314A (en) * | 2011-05-18 | 2014-02-26 | 巴斯夫欧洲公司 | Process for producing components by powder injection molding |
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Application publication date: 20201215 |