CN108930052B - Electrogalvanizing apparatus and electrogalvanizing method - Google Patents
Electrogalvanizing apparatus and electrogalvanizing method Download PDFInfo
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- CN108930052B CN108930052B CN201810515744.5A CN201810515744A CN108930052B CN 108930052 B CN108930052 B CN 108930052B CN 201810515744 A CN201810515744 A CN 201810515744A CN 108930052 B CN108930052 B CN 108930052B
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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
- C25D3/00—Electroplating: Baths therefor
- C25D3/02—Electroplating: Baths therefor from solutions
- C25D3/22—Electroplating: Baths therefor from solutions of zinc
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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
- C25D17/00—Constructional parts, or assemblies thereof, of cells for electrolytic coating
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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
- C25D21/00—Processes for servicing or operating cells for electrolytic coating
- C25D21/12—Process control or regulation
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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
- C25D21/00—Processes for servicing or operating cells for electrolytic coating
- C25D21/16—Regeneration of process solutions
- C25D21/20—Regeneration of process solutions of rinse-solutions
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Automation & Control Theory (AREA)
- Electroplating Methods And Accessories (AREA)
Abstract
The invention provides an electrogalvanizing apparatus and an electrogalvanizing method capable of greatly reducing the water discharge amount of water used in washing of plated articles. An electrogalvanizing apparatus (1) for performing a treatment for forming a galvanized coating film on the surface of a plated article, the electrogalvanizing apparatus comprising: a pretreatment unit (2) for performing degreasing treatment and base adjustment on the surface of a plated article; and a plating treatment unit (3) for performing a plating treatment on the surface of the article to be plated after the degreasing treatment and the foundation adjustment using a plating solution, wherein the pretreatment unit (2) performs the foundation adjustment on the surface of the article to be plated by spraying a polishing agent onto the surface of the article to be plated.
Description
Technical Field
The present invention relates to a technique of an electrogalvanizing apparatus and an electrogalvanizing method for forming a galvanized coating film on a surface of a plated article.
Background
Conventionally, a technique related to an electrogalvanizing apparatus and an electrogalvanizing method for performing a treatment of forming a zinc-plated film or a zinc alloy-plated film on the surface of a plated article is known (see patent document 1).
The electrogalvanizing apparatus includes a pretreatment unit and a plating unit.
In the electrogalvanizing apparatus, the pretreatment unit performs a treatment (degreasing treatment) for removing grease on the surface of the article to be plated by degreasing with alkali solution or the like, a treatment (base conditioning) for removing oxide on the surface of the article to be plated by pickling with hydrochloric acid or the like, electrolytic degreasing or the like, and the like.
In the electrogalvanizing apparatus, the plating section is constituted by, for example, a barrel electrogalvanizing apparatus, and the surface of the article to be plated is subjected to plating treatment using a plating liquid in a state where the article to be plated subjected to degreasing treatment and surface conditioning is accommodated in a barrel.
Documents of the prior art
Patent document
Patent document 1: japanese patent laid-open publication No. 2002-4080
Problems to be solved by the invention
However, in the electrogalvanizing apparatus, after degreasing treatment, backing adjustment, and the like, the workpiece to be plated needs to be subjected to water washing treatment in the pretreatment section.
Thus, the following problems are present in the electrogalvanizing apparatus: when the pretreatment unit is used to remove grease, oxides, or the like on the surface of the article to be plated, a large amount of water is required to clean the article to be plated, and a large amount of (for example, hundreds of liters per hour) drainage is generated.
Disclosure of Invention
The present invention has been made in view of the above circumstances, and an object thereof is to provide an electrogalvanizing apparatus capable of greatly reducing the amount of water to be drained in washing a plated article with water.
Means for solving the problems
Problems to be solved by the present invention are as described above, and a solution for solving the problems will be described next.
That is, in embodiment 1, the electrogalvanizing apparatus for performing a treatment of forming a galvanized coating film on a surface of a plated article includes: a pretreatment unit for performing degreasing treatment and base adjustment of the surface of the article to be plated; and a plating section for performing a plating treatment on the surface of the article to be plated after the degreasing treatment and the surface conditioning using a plating solution, wherein the pretreatment section performs the surface conditioning of the article to be plated by spraying a polishing agent onto the surface of the article to be plated.
In the embodiment 2, the pretreatment unit performs degreasing treatment of the surface of the plating object using a predetermined solvent.
In the embodiment 3, the pretreatment unit performs degreasing by dissolving the grease on the surface of the article to be plated with an organic solvent.
In embodiment 4, the present invention comprises: and a water treatment unit configured to separate water used for cleaning the article to be plated in the plating unit into water and waste, and supply the separated water to the plating unit as water used for cleaning the article to be plated.
In embodiment 5, the electrogalvanizing method for forming a galvanized coating film on a surface of a plated article includes: a step of performing degreasing treatment on the surface of the article to be plated; a step of adjusting the surface of the plated article; and a step of plating the surface of the plated article subjected to the degreasing treatment and the plating of the surface of the article subjected to the plating with a plating solution, wherein the step of plating the surface of the article subjected to the degreasing treatment includes spraying an abrasive onto the surface of the article subjected to the plating to thereby perform the plating of the surface of the article.
In embodiment 6, in the step of degreasing the surface of the plated article, the degreasing treatment of the surface of the plated article is performed using a predetermined solvent.
Effects of the invention
As the effects of the present invention, the following effects are achieved.
That is, according to the present invention, the amount of water drained from the water used for washing the plated product can be significantly reduced.
Drawings
FIG. 1 is a block diagram showing an electrogalvanizing apparatus according to an embodiment of the present invention.
FIG. 2 is a flowchart showing the operation of the electrogalvanizing apparatus according to the embodiment of the present invention.
FIG. 3 is a block diagram showing an electrogalvanizing apparatus according to an embodiment of the present invention.
FIG. 4 is a block diagram showing an electrogalvanizing apparatus according to an embodiment of the present invention.
Description of the reference numerals:
1. electrogalvanizing device
2. Pretreatment section
3. Plating part
4. Post-processing part
5. Water treatment section
6. Intermediate tank
7. Degreasing treatment section
8. Substrate adjusting part
10. Upstream tank
11. Plating bath
12. Recovery tank
13. Rinsing bath
30. Recovery water tank
31. Distillation apparatus
32. Regeneration water tank
33. Filter
Detailed Description
Next, an electrogalvanizing apparatus 1 and an electrogalvanizing method according to an embodiment of the present invention will be described with reference to fig. 1 to 4.
The electrogalvanizing apparatus 1 (electrogalvanizing method) performs a process of forming a galvanized coating film on the surface of the article to be plated. The electrogalvanizing apparatus 1 (electrogalvanizing method) is not limited to the process of forming a zinc-plated coating on the surface of a workpiece by zinc, and includes a process of forming a zinc-plated coating (zinc alloy coating) on the surface of a workpiece by a zinc alloy.
The plated article is a predetermined member made of a metal material containing iron. The article to be plated on which the zinc plating film is formed by the electrogalvanizing apparatus 1 includes a metal device for construction (for example, a metal screw for construction, a metal joint member for construction, or the like).
As shown in FIG. 1, an electrogalvanizing apparatus 1 includes: a pretreatment unit 2, a plating unit 3, a post-treatment unit 4, a water treatment unit 5, and an intermediate tank (pit) 6.
The pretreatment unit 2 performs degreasing and undercoating for removing grease, oxides, and the like on the surface of the plated product.
Oxide (oxide film) is formed on the surface of the object to be plated (for example, the object to be plated which has just been carried to the plating factory) before the pretreatment in the pretreatment unit 2, and rust and the like are adhered. The surface of the plated article before being treated in the pretreatment unit 2 is coated with grease for lubrication and rust prevention.
The pretreatment unit 2 includes a degreasing unit 7 and a base adjustment unit 8.
The degreasing unit 7 of the pretreatment unit 2 performs a treatment (degreasing treatment) for removing grease from the surface of the plated product using a predetermined solvent. The degreasing unit 7 is a nonaqueous degreasing device, and performs degreasing by dissolving grease on the surface of the article to be plated using an organic solvent. Examples of the organic solvent used in the degreasing section 7 include chlorine-based solvents such as methylene chloride, trichloroethylene, and tetrachloroethylene, and other known hydrocarbon-based, ester-based, alcohol-based, fluorine-based, or bromine-based solvents.
The base adjustment unit 8 of the pretreatment unit 2 performs base adjustment of the surface of the plated article subjected to the degreasing treatment. The substrate adjusting unit 8 is a blasting device (e.g., a sand blasting device, a shot blasting device, or the like) and performs substrate adjustment of the surface of the plated article by blasting an abrasive composed of silica, alumina, steel balls, steel grit (grid), or the like to remove oxides, rust, or the like on the surface of the plated article.
The plating section 3 performs a plating process on the surface of the object to be plated after the degreasing process and the primer adjustment in the pretreatment section 2, using a plating solution.
The plating liquid includes, for example, a plating liquid to which a brightener, ammonium chloride, potassium chloride, zinc chloride, or the like is added.
The plating section 3 is a barrel type (barrel type) electrogalvanizing apparatus and includes an upstream tank 10, a plating tank 11, a recovery tank 12, and a rinsing tank 13. The plating section 3 moves a barrel (barrel) containing a plated product from the upstream side to the downstream side in the order of the upstream tank 10, the plating tank 11, the recovery tank 12, and the rinsing tank 13 every time a predetermined time has elapsed, and performs various processes in the respective tanks.
The upstream tank 10 of the plating section 3 cleans dust adhering to the surface of the plated article (the article to be plated from which grease, oxide, or the like has been removed in the pretreatment section 2) with water. The upstream tank 10 is constituted by a multiple (two-link) tank storing water.
When the cylinder moves from the upstream side to the downstream side and is positioned above each upstream tank 10, it moves downward and is disposed in the upstream tank 10. Then, the drum is rotated in a state of being disposed in the upstream tank 10, whereby the plated product in the drum is cleaned by water.
The upstream tank 10 may be constituted by one tank.
Instead of washing the plated article with water, the upstream tank 10 may be configured to treat the surface of the plated article with a surfactant such as dilute hydrochloric acid or dilute nitric acid.
The upstream tank 10 may be configured to treat the surface of the article to be plated with a surfactant after washing the article to be plated with water.
The plating tank 11 of the plating section 3 performs plating on the plating target product cleaned in the upstream tank 10. The plating tank 11 is constituted by a plurality of (10) tanks for storing plating liquid.
When the cylinder moves from the upstream side to the downstream side and is positioned above each plating tank 11, it moves downward and is disposed in the plating tank 11. Then, the cylinder is rotated in a state of being disposed in the plating tank 11, thereby performing a plating treatment on the plating target product in the cylinder.
The recovery tank 12 of the plating section 3 recovers the plating liquid adhering to the object to be plated after the plating treatment in the plating tank 11. When the tube moves from the upstream side to the downstream side and is positioned above the recovery tank 12, it moves downward and is disposed in the recovery tank 12. Then, the plating liquid adhering to the article to be plated is recovered with the axis of the cylinder inclined at a predetermined angle (for example, 40 degrees) in the state where the cylinder is disposed in the recovery vessel 12.
The collected plating liquid is returned to the plating tank 11 via the return pipe 20. The return pipe 20 is connected to the recovery tank 12 and the plating tank 11.
The recovery tank 12 may be configured to recover the plating liquid adhering to the plating target by suction with a suction device, rotation of a drum, or the like.
The rinsing bath 13 of the plating section 3 cleans the plating liquid that has not been collected in the collection bath 12 and has adhered to the article to be plated. The washing tank 13 is constituted by a plurality of (for example, three) tanks (convective multistage washing) in which water is stored.
When the tube moves from the upstream side to the downstream side and is positioned above each rinsing bath 13, it moves downward and is disposed in rinsing bath 13. Then, the drum is rotated in a state of being disposed in the rinsing bath 13, thereby washing the plated product in the drum with water.
The tank on the most downstream side of rinsing tank 13 may be configured by using hot water to enhance the cleaning effect of the plated product and to shorten the drying time on the downstream side of rinsing tank 13.
The post-treatment section 4 takes out the plated article having been subjected to the plating treatment in the plating section 3 from the barrel, and performs a treatment (e.g., chromic acid treatment) for improving corrosion resistance of the zinc metal surface of the plated article, a treatment (e.g., phosphoric acid treatment) for improving adhesion of a coating film of the plated article in a coating step to be performed later, and the like.
The intermediate tank 6 is formed under a stage where the electrogalvanizing apparatus 1 is disposed.
The intermediate tank 6 collects and temporarily stores water (water used for cleaning the article to be plated) stored in the upstream tank 10 and the rinsing tank 13 of the plating section 3. The intermediate tank 6 collects and temporarily stores water stored in a rinsing tank for cleaning after the post-treatment section 4 has been subjected to the chromate treatment or water stored in a rinsing tank for cleaning after the phosphate treatment (water used for cleaning of the plated article).
The water stored in the upstream tank 10 and the rinsing tank 13 of the plating section 3 is collected into the intermediate tank 6 through a collection pipe 21. The recovery pipe 21 is connected to the upstream tank 10, the rinsing tank 13, and the intermediate tank 6 of the plating section 3.
The water stored in the rinsing bath for cleaning after the chromic acid treatment in the post-treatment section 4 or the water stored in the rinsing bath for cleaning after the phosphoric acid treatment is recovered to the intermediate tank 6 through the recovery pipe 22. The recovery pipe 22 is connected to a rinsing bath for washing after the chromic acid treatment in the post-treatment section 4, a rinsing bath for washing after the phosphoric acid treatment, and the intermediate bath 6.
The water treatment unit 5 performs treatment of water (water used for cleaning a plating target) stored in the intermediate tank 6. The water treatment unit 5 includes: a recovery water tank 30, a distillation apparatus 31 (a reduced pressure dehydration treatment apparatus), and a regeneration water tank 32.
The water stored in the intermediate tank 6 is collected in the collection tank 30 of the water treatment unit 5 through the collection pipe 23. The recovery pipe 23 is connected to the intermediate tank 6 and the water treatment unit 5.
The water treatment unit 5 distills water (water used for cleaning the plating object) in the recovery water tank 30 in a state where the boiling point is reduced by vacuum pressure reduction in the distillation apparatus 31, and separates the water into water (reclaimed water) and dehydrated solid waste. In the water treatment unit 5, the water separated in the distillation apparatus 31 is stored in the regeneration water tank 32, and the dehydrated solid waste is discarded.
The water stored in the regeneration water tank 32 of the water treatment unit 5 is supplied to the upstream tank 10 or the rinsing tank 13 of the plating unit 3 via the supply pipe 24. The supply pipe 24 is connected to the upstream tank 10 or the rinsing tank 13 of the plating section 3 and the regeneration water tank 32 of the water treatment section 5.
The water stored in the regeneration water tank 32 of the water treatment unit 5 is supplied to the washing tank for washing after the chromic acid treatment or the washing tank for washing after the phosphoric acid treatment of the post-treatment unit 4 through the supply pipe 24 as the water for washing the plated product. The supply pipe 24 is connected to a rinsing bath for rinsing after the chromic acid treatment or a rinsing bath for rinsing after the phosphoric acid treatment in the post-treatment section 4.
The supply pipe 24 is provided with a filter 33 (for example, an activated carbon filter), and the water stored in the intermediate tank 6 is passed through the filter 33 after impurities are filtered off.
Next, a series of operations of the electrogalvanizing apparatus 1 for forming a galvanized coating film on the surface of the article to be plated will be described.
As shown in fig. 2, in the electrogalvanizing apparatus 1, a degreasing unit 7 of the pretreatment unit 2 performs a treatment (degreasing treatment) for removing grease from the surface of the article to be plated (step S1).
In this case, the degreasing unit 7 of the pretreatment unit 2 performs a degreasing process on the surface of the plated product using a predetermined solvent. For example, in the degreasing unit 7 of the pretreatment unit 2, degreasing is performed by dissolving grease on the surface of the article to be plated using an organic solvent.
After the step of removing the grease on the surface of the plated product in the degreasing unit 7 of the pretreatment unit 2, the process proceeds to step S2.
Next, in the electrogalvanizing apparatus 1, the base adjusting section 8 of the pre-processing section 2 performs base adjustment of the surface of the article to be plated after the degreasing treatment (step S2).
At this time, the base adjustment unit 8 sprays a polishing agent to remove oxides, rust, and the like on the surface of the plated article, thereby adjusting the base of the surface of the plated article.
After the step of adjusting the surface of the plated article by the substrate adjusting section 8 of the pretreatment unit 2, the process proceeds to step S3.
Next, in the electrogalvanizing apparatus 1, the surface of the article to be plated is subjected to a plating treatment using a plating liquid in the plating section 3 (step S3).
After the step of plating the surface of the article to be plated with the plating liquid in the plating section 3, the process proceeds to step S4.
Next, in the electrogalvanizing apparatus 1, the post-treatment section 4 performs a treatment for improving corrosion resistance of the zinc metal surface of the article to be plated, a treatment for improving adhesion of a coating film of the article to be plated in a coating step performed thereafter, and the like (step S4).
In the electrogalvanizing apparatus 1, the post-treatment section 4 performs a process such as a process for improving corrosion resistance of the zinc metal surface of the article to be plated and a process for improving adhesion of the coating film of the article to be plated in a coating process performed thereafter, and then the operation is terminated.
In this way, the electrogalvanizing apparatus 1 performs a process of forming a galvanized coating film on the surface of the article to be plated.
As described above, in the electrogalvanizing apparatus 1 (electrogalvanizing method) in which the pretreatment unit 2 (degreasing unit 7 of the pretreatment unit 2) performs degreasing treatment of the surface of the article to be plated using a predetermined solvent, the pretreatment unit 2 does not need to perform washing after alkaline degreasing and washing after electrolytic degreasing, and the treatment of removing grease from the surface of the article to be plated is performed without draining. Therefore, in the electrogalvanizing apparatus 1 (electrogalvanizing method), when the treatment for forming the galvanized coating film on the surface of the article to be plated is performed, the amount of water to be drained by the water washing of the article to be plated can be greatly reduced (from hundreds liters per hour to tens of liters).
Therefore, in the electrogalvanizing apparatus 1 (electrogalvanizing method), a drainage facility for water used for washing after degreasing with an alkaline solution, a drainage facility for water used for washing after degreasing with an electrolysis solution, and the like are not required, and the drainage facility can be configured at a low cost.
As described above, in the electrogalvanizing apparatus 1 (electrogalvanizing method) in which the pretreatment unit 2 (degreasing unit 7 of the pretreatment unit 2) performs degreasing by dissolving grease on the surface of the article to be plated with an organic solvent, the pretreatment unit 2 does not need to perform washing after alkaline degreasing and washing after electrolytic degreasing, and performs treatment for removing grease on the surface of the article to be plated without draining.
Therefore, in the electrogalvanizing apparatus 1 (electrogalvanizing method), when the treatment for forming the galvanized coating film on the surface of the article to be plated is performed, the amount of water discharged from the water used for washing the article to be plated can be significantly reduced (from hundreds of liters per hour to tens of liters).
Therefore, in the electrogalvanizing apparatus 1 (electrogalvanizing method), a drainage facility for water used for washing after degreasing with an alkaline solution, a drainage facility for water used for washing after degreasing with an electrolysis solution, and the like are not required, and the drainage facility can be configured at a low cost.
As described above, in the electrogalvanizing apparatus 1 (electrogalvanizing method) in which the pre-treatment section 2 (the base adjustment section 8 of the pre-treatment section 2) performs base adjustment of the surface of the plated article by spraying the abrasive onto the surface of the degreased article, the treatment for removing the oxide on the surface of the plated article is performed without draining without performing washing after acid washing with hydrochloric acid or the like in the pre-treatment section 2.
Therefore, in the electrogalvanizing apparatus 1 (electrogalvanizing method), when the treatment for forming the galvanized coating film on the surface of the article to be plated is performed, the amount of water to be drained by the water washing of the article to be plated can be greatly reduced (from hundreds liters per hour to tens of liters).
Therefore, in the electrogalvanizing apparatus 1 (electrogalvanizing method), a water discharge facility using water used for washing with water after pickling with hydrochloric acid or the like is not required, and the water discharge facility can be configured at low cost.
As described above, in the electrogalvanizing apparatus 1 (electrogalvanizing method) in which the pretreatment unit 2 (degreasing unit 7 and base adjustment unit 8 of the pretreatment unit 2) performs degreasing by dissolving grease on the surface of the article to be plated with an organic solvent and performs base adjustment of the surface of the article to be plated by spraying an abrasive onto the surface of the article to be plated after the degreasing, the pretreatment unit 2 does not need to separately perform washing after degreasing with an alkaline solution, washing after pickling with hydrochloric acid or the like, and washing after degreasing with an electrolyte, and performs treatment for removing grease, oxides, and the like on the surface of the article to be plated without draining.
Therefore, in the electrogalvanizing apparatus 1 (electrogalvanizing method), when the treatment for forming the galvanized coating film on the surface of the article to be plated is performed, the amount of water discharged from the water used for washing the article to be plated can be significantly reduced (from hundreds of liters per hour to tens of liters).
Therefore, in the electrogalvanizing apparatus 1 (electrogalvanizing method), a drainage facility for water used for washing after degreasing with an alkaline solution, a drainage facility for water used for washing after degreasing with an electrolysis, a drainage facility for water used for washing after pickling with hydrochloric acid or the like, and the like are not required, and the drainage facility can be configured at a low cost.
Therefore, in the electrogalvanizing apparatus 1 (electrogalvanizing method), in addition to a great reduction in the entire amount of water to be discharged, it is not necessary to treat water containing alkali degreaser, emulsified oil components, hydrochloric acid used in pickling, and the like, and metals dissolved therein, and therefore, the water treatment unit 5 can be made small in size.
In addition, in the electrogalvanizing apparatus 1 (electrogalvanizing method), as described above, the pretreatment section 2 (the base adjustment section 8 of the pretreatment section) performs base adjustment of the surface of the plated article by spraying abrasive onto the surface of the degreased article without performing pickling, so that the plating tank 11 of the plating section 3 (the plating bath 11 or the plating solution in the plating tank 11) can be kept in a state of not being contaminated with iron ions or the like. That is, in the electrogalvanizing apparatus 1 (electrogalvanizing method), since pickling is not performed in the pretreatment section 2 (the base adjusting section 8 of the pretreatment section), it is not necessary to add a PH adjuster (ammonia, hydrogen peroxide, or the like) to remove iron ions from the plating liquid in the plating tank 11.
In the electrogalvanizing apparatus 1 (electrogalvanizing method), since pickling is not performed in the pre-treatment section 2 (base adjusting section 8 of the pre-treatment section), odor generated in the working environment can be reduced, and the working environment can be improved, and corrosion of equipment, buildings, and the like by acid can be prevented.
Further, in the electrogalvanizing apparatus 1 (electrogalvanizing method), as described above, the pretreatment section 2 (degreasing section 7 of the pretreatment section) performs degreasing by dissolving grease on the surface of the plated article using an organic solvent without performing electrolytic degreasing, and therefore, the risk of hydrogen embrittlement of the plated article after the plating treatment can be reduced.
In addition, in the electrogalvanizing apparatus 1 (electrogalvanizing method) in which the water treatment unit 5 distills the water used for cleaning the plated article in the plating unit 3 to separate water (reclaimed water) from the solid waste and supplies the separated water (reclaimed water) to the upstream tank 10 or the rinsing tank 13 of the plating unit 3 as the water used for cleaning the plated article, the water used for cleaning the plated article in the plating unit 3 is reused, and the water used for cleaning the plated article does not need to be treated to be discharged (drained) as described above.
Therefore, in the electrogalvanizing apparatus 1 (electrogalvanizing method), it is not necessary to introduce expensive wastewater treatment facilities in order to satisfy the wastewater standards of water used for cleaning the article to be plated, which are expected to become increasingly strict.
In the electrogalvanizing apparatus 1 (electrogalvanizing method) in which the water treatment unit 5 distills the water used for cleaning the article to be plated in the post-treatment unit 4 to separate the solid waste from the water (reclaimed water), and supplies the separated water (reclaimed water) as the water for cleaning the article to be plated to the rinsing tank for cleaning after the chromate treatment or the rinsing tank for cleaning after the phosphate treatment in the post-treatment unit 4, the water used for cleaning the article to be plated in the post-treatment unit 4 is reused, and the water used for cleaning the article to be plated does not need to be treated to be discharged (drained).
Therefore, in the electrogalvanizing apparatus 1 (electrogalvanizing method), it is not necessary to introduce expensive wastewater treatment facilities in order to satisfy the wastewater standards of water used for cleaning the article to be plated, which are expected to become increasingly strict.
As shown in FIG. 3, the electrogalvanizing apparatus 1 may be configured to include the pretreatment unit 2, the plating unit 3, the post-treatment unit 4, and the water treatment unit 5 without the intermediate tank 6.
The water treatment unit 5 includes a plurality of recovery water tanks 30 corresponding to a tank (the amount of recovered water) for storing the recovered water. The water treatment unit 5 includes a recovery tank 30 for each tank (the amount of recovered water) that stores recovered water. The water treatment unit 5 includes: a recovery water tank 30a for recovering the water stored in the upstream tank 10 of the plating section 3, a recovery water tank 30b for recovering the water stored in the rinsing tank 13 of the plating section 3, and a recovery water tank 30c for recovering the water stored in the rinsing tank of the post-treatment section 4.
The water stored in the upstream tank 10 of the plating section 3 is collected into the recovery tank 30a of the water treatment section 5 through the recovery pipe 25. The recovery pipe 25 is connected to the upstream tank 10 of the plating section 3 and the recovery tank 30a of the water treatment section 5.
The water stored in the rinsing bath 13 of the plating section 3 is collected in the recovery tank 30b of the water treatment section 5 through the recovery pipe 26. The recovery pipe 26 is connected to the rinsing bath 13 of the plating section 3 and the recovery tank 30b of the water treatment section 5.
The water stored in the rinsing bath for rinsing after the chromic acid treatment in the post-treatment section 4 or the water stored in the rinsing bath for rinsing after the phosphoric acid treatment is recovered to the recovery water tank 30c of the water treatment section through the recovery pipe 27. The recovery pipe 27 is connected to a rinsing bath for washing after chromic acid treatment or a rinsing bath for washing after phosphoric acid treatment of the post-treatment section 4, and a recovery water tank 30c of the water treatment section 5.
In this way, since the water treatment unit 5 includes the recovery water tank 30 (the recovery water tanks 30a, 30b, and 30 c) for each tank (the component of the recovered water) storing the recovered water, the treatment of separating the water (the water used for cleaning the plating object) in the recovery water tank 30 into water (reclaimed water) and dehydrated solid waste by distilling the water in the recovery water tank 30 in a state where the boiling point is reduced by vacuum pressure reduction in the distillation apparatus 31 can be easily and reliably performed, as compared with the treatment of recovering the water from one recovery water tank 30 from a plurality of tanks.
The water treatment section 5 of the electrogalvanizing apparatus 1 may be configured as follows: the treatment for obtaining the reclaimed water is performed separately from the water used and recovered in the plating section 3 and the water used and recovered in the post-treatment section 4 without using the common distillation apparatus 31, the reclaimed water tank 32, the filter 33, or the like.
As shown in fig. 4, the water treatment unit 5 includes: recovery water tanks 30a, 30b, 30c; distillation means 31a, 31c; the regeneration water tanks 32a, 32c; and filters 33a, 33c.
The water stored in the upstream tank 10 of the plating section 3 is recovered to the recovery water tank 30a of the water treatment section 5, the water stored in the rinsing tank 13 of the plating section 3 is recovered to the recovery water tank 30b of the water treatment section 5, and the water stored in the rinsing tank for cleaning after the chromic acid treatment or the water stored in the rinsing tank for cleaning after the phosphoric acid treatment of the post-treatment section 4 is recovered to the recovery water tank 30c of the water treatment section.
The water treatment unit 5 separates water (water used for cleaning the plating target) in the recovery water tanks 30a and 30b into water (reclaimed water) and dehydrated solid waste in the distillation apparatus 31 a. In the water treatment section 5, the water separated in the distillation apparatus 31a is stored in a regeneration water tank 32a, and impurities are filtered out by a filter 33a, and supplied to the upstream tank 10 or the rinsing tank 13 of the plating section 3, the rinsing tank for rinsing after the chromate treatment or the rinsing tank for rinsing after the phosphate treatment in the post-treatment section 4.
The water treatment unit 5 also separates the water in the recovery tank 30c (water used for cleaning the plating object) into water (reclaimed water) and dehydrated solid waste in the distillation apparatus 31 c. In the water treatment section 5, the water separated in the distillation apparatus 31c is stored in a regeneration water tank 32c, and impurities are filtered out by a filter 33c, and supplied to the upstream tank 10 or the rinsing tank 13 of the plating section 3, the rinsing tank for rinsing after the chromate treatment or the rinsing tank for rinsing after the phosphate treatment in the post-treatment section 4.
In this way, the water treatment unit 5 distills the water used in the plating treatment unit 3 and the water used in the post-treatment unit 4 in the different distillation apparatuses 31a and 31c, respectively, to separate them into water (reclaimed water) and dehydrated solid waste, stores the distilled water in the different reclaimed water tanks 32a and 32c, respectively, filters out impurities in the different filters 33a and 33c, and supplies the filtered water to the plating treatment unit 3, the post-treatment unit 4, and the like, and therefore, compared with an apparatus in which the water used in the plating treatment unit 3 and the water used in the post-treatment unit 4 are distilled by one distillation apparatus 31, and the distilled water is stored in one reclaimed water tank 32, and the impurities are filtered out by one filter 33, the treatment for obtaining reclaimed water can be performed easily and reliably.
The water treatment unit 5 may be configured to separate the water in the recovery water tanks 30a and 30c into water (regenerated water) and dehydrated solid waste in a common distillation apparatus 31 (for example, distillation apparatus 31 a). In this case, the water treatment unit 5 is configured to separate the water in the recovery tank 30b into water (reclaimed water) and dehydrated solid waste in another distillation apparatus 31 (for example, a distillation apparatus 31 c).
The water treatment unit 5 may be configured to separate the water in the recovery water tanks 30b and 30c into water (reclaimed water) and dehydrated solid waste in a common distillation apparatus 31 (for example, distillation apparatus 31 a). In this case, the water treatment unit 5 is configured to separate the water in the recovery tank 30a into water (regenerated water) and dehydrated solid waste in another distillation apparatus 31 (for example, distillation apparatus 31 c), or configured to directly circulate the water in the recovery tank 30a through the filter 33 (filter 33 c) without passing through the distillation apparatus 31 (distillation apparatus 31 c).
With this configuration, the process of obtaining the reclaimed water can be performed easily and reliably, as compared with a system in which water used in the upstream tank 10 of the plating section 3, water used in the rinsing tank 13 of the plating section 3, and water used in the rinsing tank of the post-treatment section 4 are distilled by one distillation apparatus 31, and the distilled water is stored in one reclaimed water tank 32, and impurities are filtered out by one filter 33.
Claims (2)
1. An electrogalvanizing apparatus for forming a galvanized coating film on the surface of a plated article,
the disclosed device is provided with: a pretreatment unit for performing degreasing treatment and base adjustment of the surface of the plated article; and a plating section for performing a plating treatment on the surface of the article to be plated after the degreasing treatment and the substrate conditioning are performed using a plating solution,
the pretreatment section performs degreasing treatment without draining by dissolving grease on the surface of the plated article with an organic solvent, and thereafter performs undercoating adjustment of the surface of the plated article by spraying an abrasive onto the surface of the plated article without cleaning the degreased article,
the electrogalvanizing apparatus further comprises: a water treatment unit for separating water used for cleaning the article to be plated in the plating unit into water and waste, and supplying the separated water to the plating unit as water for cleaning the article to be plated,
the plating section comprises an upstream tank, a plating tank, a recovery tank, and a rinsing tank,
the upstream tank cleans dust adhering to the surface of the article to be plated from which grease and oxides have been removed in the pretreatment section,
the plating tank performs plating treatment on the plating object cleaned in the upstream tank,
the recovery tank recovers the plating liquid adhering to the plating object after the plating treatment in the plating tank,
the rinsing tank cleans the plating liquid that has not been collected by the collection tank and has adhered to the article to be plated,
the water treatment unit collects water used for cleaning the plated article in the upstream tank and the rinsing tank, separates the water into water and waste, and supplies the separated water to the upstream tank and the rinsing tank as water used for cleaning the plated article.
2. A zinc electroplating method for forming a zinc-plated coating film on the surface of a plated article, comprising:
a step of performing degreasing treatment on the surface of the plated article;
a step of adjusting the surface of the plated article; and
a step of plating the surface of the article to be plated after the degreasing treatment and the surface conditioning of the substrate are performed with a plating solution,
in the step of degreasing the surface of the article to be plated, degreasing is performed without draining by dissolving the grease on the surface of the article to be plated with an organic solvent,
in the step of adjusting the surface of the article to be plated, polishing agents are sprayed on the surface of the article to be plated to adjust the surface of the article to be plated,
after the step of degreasing the surface of the plated article, performing a plating base adjustment of the surface of the plated article without cleaning the degreased article,
in the electro-galvanizing method, the zinc plating solution is,
separating the water used for cleaning the plated article after the plating treatment into water and waste, and supplying the separated water as the water for cleaning the plated article after the plating treatment,
the plating treatment is performed by the following steps:
cleaning dust adhering to the surface of the object to be plated from which the grease and oxide have been removed in the degreasing step and the base conditioning step in the upstream tank;
performing plating treatment on the plating object after the upstream tank is cleaned in a plating tank;
recovering, in a recovery tank, the plating solution adhering to the object to be plated after the plating treatment in the plating tank; and
washing the plating liquid adhering to the article to be plated without being collected in the collection vessel in a washing vessel,
the water used for cleaning the plated product in the upstream tank and the rinsing tank is collected and separated into water and waste, and the separated water is supplied to the upstream tank and the rinsing tank as water used for cleaning the plated product.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017104959A JP7075573B2 (en) | 2017-05-26 | 2017-05-26 | Electro-galvanizing equipment and electro-galvanizing method |
| JP2017-104959 | 2017-05-26 |
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| CN108930052A CN108930052A (en) | 2018-12-04 |
| CN108930052B true CN108930052B (en) | 2023-02-28 |
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| JP (1) | JP7075573B2 (en) |
| CN (1) | CN108930052B (en) |
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| CN111979551B (en) * | 2020-07-09 | 2023-04-07 | 江苏兴达钢帘线股份有限公司 | Cleaning method for replacing phosphorization of thermal diffusion plating line |
| CN112962127A (en) * | 2021-01-29 | 2021-06-15 | 无锡鹰贝电化学工程有限公司 | Electro-galvanizing process for high-strength steel common rail joint |
| CN114214676B (en) * | 2021-12-31 | 2023-10-13 | 成都高鑫机械制造有限公司 | Galvanization method for metal workpiece |
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| JPS63219597A (en) * | 1987-03-09 | 1988-09-13 | Sumitomo Electric Ind Ltd | Surface treatment of metal |
| JP2006057169A (en) * | 2004-08-23 | 2006-03-02 | Sanei Kogyo Kk | Method for manufacturing digger of farm machine, and digger using it |
| TW201410927A (en) * | 2012-09-10 | 2014-03-16 | Yamaha Motor Co Ltd | Iron plating apparatus |
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| TWI750374B (en) | 2021-12-21 |
| CN108930052A (en) | 2018-12-04 |
| JP7075573B2 (en) | 2022-05-26 |
| JP2018199848A (en) | 2018-12-20 |
| TW201900935A (en) | 2019-01-01 |
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