CN111945091A - Galvanizing production process - Google Patents
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- CN111945091A CN111945091A CN201910402441.7A CN201910402441A CN111945091A CN 111945091 A CN111945091 A CN 111945091A CN 201910402441 A CN201910402441 A CN 201910402441A CN 111945091 A CN111945091 A CN 111945091A
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- 238000005246 galvanizing Methods 0.000 title claims description 18
- 238000004519 manufacturing process Methods 0.000 title claims description 16
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 53
- 229910052725 zinc Inorganic materials 0.000 claims description 53
- 239000011701 zinc Substances 0.000 claims description 53
- 238000007747 plating Methods 0.000 claims description 49
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 37
- 239000003795 chemical substances by application Substances 0.000 claims description 29
- 238000001035 drying Methods 0.000 claims description 29
- 239000007788 liquid Substances 0.000 claims description 29
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 24
- 238000002161 passivation Methods 0.000 claims description 23
- 239000002253 acid Substances 0.000 claims description 20
- 238000004140 cleaning Methods 0.000 claims description 20
- 238000001816 cooling Methods 0.000 claims description 19
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 claims description 14
- JIAARYAFYJHUJI-UHFFFAOYSA-L zinc dichloride Chemical compound [Cl-].[Cl-].[Zn+2] JIAARYAFYJHUJI-UHFFFAOYSA-L 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 13
- 238000007654 immersion Methods 0.000 claims description 11
- 235000019270 ammonium chloride Nutrition 0.000 claims description 7
- 235000005074 zinc chloride Nutrition 0.000 claims description 7
- 239000011592 zinc chloride Substances 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 5
- 238000005498 polishing Methods 0.000 claims description 5
- 238000002791 soaking Methods 0.000 claims description 5
- 239000000126 substance Substances 0.000 claims description 5
- 238000005406 washing Methods 0.000 claims description 5
- 238000000576 coating method Methods 0.000 description 7
- 239000011248 coating agent Substances 0.000 description 6
- 239000012535 impurity Substances 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 230000003796 beauty Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 1
- UOURRHZRLGCVDA-UHFFFAOYSA-D pentazinc;dicarbonate;hexahydroxide Chemical compound [OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[Zn+2].[Zn+2].[Zn+2].[Zn+2].[Zn+2].[O-]C([O-])=O.[O-]C([O-])=O UOURRHZRLGCVDA-UHFFFAOYSA-D 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000003223 protective agent Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 239000000080 wetting agent 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
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
- C23C2/06—Zinc or cadmium or alloys based thereon
-
- 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
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Coating With Molten Metal (AREA)
Abstract
The invention provides a galvanizing production process, which relates to the technical field of metal coatings and comprises the following steps: before plating treatment, removing the adhesive on the surface of the workpiece, and arranging zinc flowing holes on the surface of the workpiece; acid washing, removing the oxide on the surface of the workpiece; preparing a plating assistant agent, namely mixing zinc chloride and ammonium chloride to prepare the plating assistant agent; treating with a plating assistant agent, namely immersing the workpiece into a plating assistant tank; drying, namely fishing out the workpiece from the plating assisting pool and putting the workpiece into a drying chamber; hot galvanizing, namely immersing the workpiece into hot zinc liquid in a zinc liquid pool, taking out the workpiece, and cooling the workpiece in air; water cooling and passivating, namely putting the hot-galvanized workpiece into a clean water tank for cooling, and passivating the cooled workpiece in a passivation tank to form a passivation film on the surface of the workpiece; and (4) finishing, namely unloading the workpiece from the lifting appliance, and polishing the surface of the workpiece to be smooth. The invention can improve the quality of finished products and save the cost.
Description
Technical Field
The invention belongs to the technical field of metal coatings, and particularly relates to a galvanizing production process.
Background
Galvanization refers to a surface treatment technology for plating a layer of zinc on the surface of metal, alloy or other materials to play the roles of beauty, rust prevention and the like. The method mainly adopted is hot galvanizing. Zinc is readily soluble in acids and also soluble in bases, so it is called an amphoteric metal. The zinc hardly changes in the dry air. In humid air, a dense film of basic zinc carbonate is formed on the zinc surface. In the atmosphere containing sulfur dioxide, hydrogen sulfide and oceanic atmosphere, the corrosion resistance of zinc is poor, and particularly in the atmosphere containing high-temperature high-humidity organic acid, a zinc coating is extremely easy to corrode. The standard electrode potential of zinc is-0.76V, and for steel matrix, the zinc coating belongs to an anodic coating, which is mainly used for preventing corrosion of steel, and the relation between the quality of protective performance and coating thickness is very large. After the zinc coating is passivated, dyed or coated with a light-protecting agent, the protective property and the decorative property of the zinc coating can be obviously improved. The existing workpiece is directly immersed into a zinc dissolving tank after being washed with acid to remove impurities and rust, the zinc consumption is high, and when impurities are mixed in zinc liquid and cooling water, the zinc plating effect is generally influenced, and the production cost is increased.
Therefore, it is urgently needed to provide a galvanization production process which can increase the quality of finished products and save the cost.
Disclosure of Invention
The invention aims to provide a galvanizing production process aiming at the defects of the prior art.
The invention provides the following technical scheme:
a galvanization production process comprises the following steps:
s1, pre-plating treatment: hanging the workpiece by using a lifting appliance, conveying the workpiece into a first clean water tank, removing the adhered substances on the surface of the workpiece by using a first cleaning device, and arranging zinc flowing holes on the surface of the workpiece;
s2, acid washing: injecting 15-17% dilute hydrochloric acid into the acid tank, placing the workpiece into the acid tank to be immersed by the dilute hydrochloric acid, wherein the immersion time is 10-15min, lifting the workpiece to be above a dilute hydrochloric acid interface every 5min, re-immersing the workpiece into the dilute hydrochloric acid, fishing out the workpiece after full immersion, placing the workpiece into a second clean water tank, lifting the workpiece to be above a clean water interface every 5min in the cleaning process, re-immersing the workpiece into clean water, and lifting the workpiece three times in the cleaning process;
s3, preparing a plating assistant agent: pouring 2-4 parts of zinc chloride and 1-3 parts of ammonium chloride into a plating assistant tank according to the parts by weight, uniformly mixing to prepare a plating assistant agent, and adding 0.2-0.5 part of an explosion-proof agent into the plating assistant agent;
s4, plating assistant agent treatment: soaking the workpiece cleaned in the step S3 in a plating assistant tank for 30-40S;
s5, drying treatment: taking out the workpiece from the plating assisting pool, putting the workpiece into a drying chamber, adjusting the temperature in the drying chamber to 55-75 ℃, drying for 3-5min, taking the workpiece out of the drying chamber, and removing an oxide layer on the surface of the workpiece by using a third cleaning device;
s6, hot galvanizing: heating the zinc liquid in the zinc liquid pool to 430-435 ℃, immersing the workpiece in the hot zinc liquid in the zinc liquid pool for 5-10min, taking out the workpiece to cool in the air for 10-15s, immersing in the hot zinc liquid again, and repeating the cooling step for three times;
s7, water cooling and passivation treatment: placing the hot-galvanized workpiece into a clean water tank for cooling for 20-30s, placing the cooled workpiece into a passivation tank for passivation for 15-30min, and forming a passivation film on the surface of the workpiece;
s8, finishing: and (4) unloading the workpiece from the lifting appliance, and polishing the surface of the workpiece to be smooth.
Preferably, 16% dilute hydrochloric acid is injected into the acid tank in step S2, and the workpiece is placed into the acid tank to be immersed in the dilute hydrochloric acid, wherein the immersion time is 13 min.
Preferably, in step S3, 3 parts by weight of zinc chloride and 2 parts by weight of ammonium chloride are poured into a plating assistant tank and mixed uniformly to prepare a plating assistant agent, and 0.35 part by weight of an explosion-proof agent is added to the plating assistant agent.
Preferably, the time for the workpiece to be immersed in the plating assistant tank in the step S4 is 35S.
Preferably, the temperature in the drying chamber is adjusted to 65 ℃ in step S5, and the drying time is 4 min.
Preferably, in step S6, the molten zinc in the molten zinc bath is heated to 433 ℃, the workpiece is immersed in the hot molten zinc in the molten zinc bath for 8min, and the workpiece is taken out to the air and cooled for 13S.
Preferably, in step S7, the hot-galvanized workpiece is placed into a clean water tank to be cooled for 25S, a second filter and a refrigerating device are arranged inside the clean water tank, the water temperature is kept at 35-40 ℃, and the cooled workpiece is placed into a passivation tank to be passivated for 22 min.
The invention has the beneficial effects that: the wetting agent improves the function of the plating assistant liquid, and the plating assistant liquid can remove impurities such as residual ferric salt and undeleted ferric oxide on the surface of a workpiece, and improve the quality of a finished product; the first filter and the second filter enable the zinc liquid and the clean water to be recycled, the quality of a plated part is high, and the production cost is saved.
Detailed Description
Example 1
A galvanization production process comprises the following steps:
s1, pre-plating treatment: hanging the workpiece by using a lifting appliance, conveying the workpiece into a first clean water tank, removing the adhered substances on the surface of the workpiece by using a first cleaning device, and arranging zinc flowing holes on the surface of the workpiece;
s2, acid washing: injecting 15% dilute hydrochloric acid into the acid tank, placing the workpiece into the acid tank to be immersed by the dilute hydrochloric acid, wherein the immersion time is 10min, lifting the workpiece to be above a dilute hydrochloric acid interface every 5min, re-immersing the workpiece into the dilute hydrochloric acid, fishing out the workpiece after full immersion, placing the workpiece into a second clean water tank, lifting the workpiece to be above a clean water interface every 5min in the cleaning process, re-immersing the workpiece into clean water, and lifting the workpiece three times in the cleaning process;
s3, preparing a plating assistant agent: pouring 2 parts of zinc chloride and 1 part of ammonium chloride into a plating assistant tank according to the parts by weight, uniformly mixing to prepare a plating assistant agent, and adding 0.2 part of an explosion-proof agent into the plating assistant agent;
s4, plating assistant agent treatment: soaking the workpiece cleaned in the step S3 in a plating assistant tank for 30S;
s5, drying treatment: taking out the workpiece from the plating assisting pool, putting the workpiece into a drying chamber, adjusting the temperature in the drying chamber to 55 ℃, drying for 3min, taking the workpiece out of the drying chamber, and removing an oxide layer on the surface of the workpiece by using a third cleaning device;
s6, hot galvanizing: heating the zinc liquid in the zinc liquid pool to 430 ℃, immersing the workpiece in the hot zinc liquid in the zinc liquid pool for 5min, taking out the workpiece, cooling the workpiece in the air for 10s, immersing the workpiece in the hot zinc liquid again, and repeating the cooling step for three times;
s7, water cooling and passivation treatment: placing the hot-galvanized workpiece into a clean water tank for cooling for 20s, placing the cooled workpiece into a passivation tank for passivation for 15min, and forming a passivation film on the surface of the workpiece;
s8, finishing: and (4) unloading the workpiece from the lifting appliance, and polishing the surface of the workpiece to be smooth.
Example 2
S1, pre-plating treatment: hanging the workpiece by using a lifting appliance, conveying the workpiece into a first clean water tank, removing the adhered substances on the surface of the workpiece by using a first cleaning device, and arranging zinc flowing holes on the surface of the workpiece;
s2, acid washing: injecting 16% dilute hydrochloric acid into the acid tank, placing the workpiece into the acid tank to be immersed by the dilute hydrochloric acid, wherein the immersion time is 13min, lifting the workpiece to be above a dilute hydrochloric acid interface every 5min, re-immersing the workpiece into the dilute hydrochloric acid, fishing out the workpiece after full immersion, placing the workpiece into a second clean water tank, lifting the workpiece to be above a clean water interface every 5min in the cleaning process, re-immersing the workpiece into clean water, and lifting the workpiece three times in the cleaning process;
s3, preparing a plating assistant agent: pouring 3 parts of zinc chloride and 2 parts of ammonium chloride into a plating assistant tank according to the parts by weight, uniformly mixing to prepare a plating assistant agent, and adding 0.35 part of an explosion-proof agent into the plating assistant agent;
s4, plating assistant agent treatment: soaking the workpiece cleaned in the step S3 in a plating assistant tank for 35S;
s5, drying treatment: taking out the workpiece from the plating assisting pool, putting the workpiece into a drying chamber, adjusting the temperature in the drying chamber to 65 ℃, drying for 4min, taking the workpiece out of the drying chamber, and removing an oxide layer on the surface of the workpiece by using a third cleaning device;
s6, hot galvanizing: heating the zinc liquid in the zinc liquid pool to 433 ℃, immersing the workpiece in the hot zinc liquid in the zinc liquid pool for 8min, taking out the workpiece, cooling the workpiece in the air for 13s, immersing the workpiece in the hot zinc liquid again, and repeating the cooling step for three times;
s7, water cooling and passivation treatment: placing the hot-galvanized workpiece into a clean water tank for cooling for 25s, placing the cooled workpiece into a passivation tank for passivation for 22min, and forming a passivation film on the surface of the workpiece;
s8, finishing: and (4) unloading the workpiece from the lifting appliance, and polishing the surface of the workpiece to be smooth.
Example 3
S1, pre-plating treatment: hanging the workpiece by using a lifting appliance, conveying the workpiece into a first clean water tank, removing the adhered substances on the surface of the workpiece by using a first cleaning device, and arranging zinc flowing holes on the surface of the workpiece;
s2, acid washing: injecting 17% dilute hydrochloric acid into the acid tank, placing the workpiece into the acid tank to be immersed by the dilute hydrochloric acid, wherein the immersion time is 15min, lifting the workpiece to be above a dilute hydrochloric acid interface every 5min, re-immersing the workpiece into the dilute hydrochloric acid, taking out the workpiece after full immersion, placing the workpiece into a second clean water tank, lifting the workpiece to be above a clean water interface every 5min in the cleaning process, re-immersing the workpiece into clean water, and lifting the workpiece three times in the cleaning process;
s3, preparing a plating assistant agent: pouring 4 parts of zinc chloride and 3 parts of ammonium chloride into a plating assistant tank according to the parts by weight, uniformly mixing to prepare a plating assistant agent, and adding 0.5 part of an explosion-proof agent into the plating assistant agent;
s4, plating assistant agent treatment: soaking the workpiece cleaned in the step S3 in a plating assistant tank for 40S;
s5, drying treatment: taking out the workpiece from the plating assisting pool, putting the workpiece into a drying chamber, adjusting the temperature in the drying chamber to 75 ℃, drying for 5min, taking the workpiece out of the drying chamber, and removing an oxide layer on the surface of the workpiece by using a third cleaning device;
s6, hot galvanizing: heating the zinc liquid in the zinc liquid pool to 435 ℃, immersing the workpiece in the hot zinc liquid in the zinc liquid pool for 10min, taking out the workpiece, cooling the workpiece in the air for 15s, immersing the workpiece in the hot zinc liquid again, and repeating the cooling step for three times;
s7, water cooling and passivation treatment: placing the hot-galvanized workpiece into a clean water tank for cooling for 30s, placing the cooled workpiece into a passivation tank for passivation for 30min, and forming a passivation film on the surface of the workpiece;
s8, finishing: and (4) unloading the workpiece from the lifting appliance, and polishing the surface of the workpiece to be smooth.
The parameters of the galvanized workpiece are shown in the table 1:
TABLE 1
As can be seen from the data in Table 1, the galvanizing process methods provided in examples 1 to 3 are effective.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A galvanization production process is characterized by comprising the following steps:
s1, pre-plating treatment: hanging the workpiece by using a lifting appliance, conveying the workpiece into a first clean water tank, removing the adhered substances on the surface of the workpiece by using a first cleaning device, and arranging zinc flowing holes on the surface of the workpiece;
s2, acid washing: injecting 15-17% dilute hydrochloric acid into the acid tank, placing the workpiece into the acid tank to be immersed by the dilute hydrochloric acid, wherein the immersion time is 10-15min, lifting the workpiece to be above a dilute hydrochloric acid interface every 5min, re-immersing the workpiece into the dilute hydrochloric acid, fishing out the workpiece after full immersion, placing the workpiece into a second clean water tank, lifting the workpiece to be above a clean water interface every 5min in the cleaning process, re-immersing the workpiece into clean water, and lifting the workpiece three times in the cleaning process;
s3, preparing a plating assistant agent: pouring 2-4 parts of zinc chloride and 1-3 parts of ammonium chloride into a plating assistant tank according to the parts by weight, uniformly mixing to prepare a plating assistant agent, and adding 0.2-0.5 part of an explosion-proof agent into the plating assistant agent;
s4, plating assistant agent treatment: soaking the workpiece cleaned in the step S3 in a plating assistant tank for 30-40S;
s5, drying treatment: taking out the workpiece from the plating assisting pool, putting the workpiece into a drying chamber, adjusting the temperature in the drying chamber to 55-75 ℃, drying for 3-5min, taking the workpiece out of the drying chamber, and removing an oxide layer on the surface of the workpiece by using a third cleaning device;
s6, hot galvanizing: heating the zinc liquid in the zinc liquid pool to 430-435 ℃, immersing the workpiece in the hot zinc liquid in the zinc liquid pool for 5-10min, taking out the workpiece to cool in the air for 10-15s, immersing in the hot zinc liquid again, and repeating the cooling step for three times;
s7, water cooling and passivation treatment: placing the hot-galvanized workpiece into a clean water tank for cooling for 20-30s, placing the cooled workpiece into a passivation tank for passivation for 15-30min, and forming a passivation film on the surface of the workpiece;
s8, finishing: and (4) unloading the workpiece from the lifting appliance, and polishing the surface of the workpiece to be smooth.
2. The production process of claim 1, wherein 16% dilute hydrochloric acid is injected into the acid bath in step S2, and the workpiece is immersed in the dilute hydrochloric acid for 13 min.
3. The galvanizing production process according to claim 1, wherein 3 parts of zinc chloride and 2 parts of ammonium chloride are poured into the galvanizing aid tank according to the parts by weight in the step S3 and are uniformly mixed to prepare the galvanizing aid, and 0.35 part of the explosion-proof agent is added into the galvanizing aid.
4. The production process of claim 1, wherein the time for immersing the workpiece in the plating assistant tank in the step S4 is 35S.
5. The galvanizing production process according to claim 1, wherein the temperature in the drying chamber in the step S5 is adjusted to 65 ℃ and the drying time is 4 min.
6. The galvanizing production process of claim 1, wherein the molten zinc in the molten zinc pool is heated to 433 ℃ in the step S6, the workpiece is immersed in the hot molten zinc in the molten zinc pool for 8min, and the workpiece is taken out to be cooled in air for 13S.
7. The galvanizing production process according to claim 1, wherein the hot galvanized workpiece is placed in a clean water tank for cooling for 25S in the step S7, a second filter and a refrigerating device are arranged inside the clean water tank, the water temperature is kept at 35-40 ℃, and the cooled workpiece is placed in a passivation tank for passivation for 22 min.
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| CN201910402441.7A CN111945091A (en) | 2019-05-15 | 2019-05-15 | Galvanizing production process |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113774304A (en) * | 2021-09-18 | 2021-12-10 | 安徽长青建筑制品有限公司 | Economical and practical hot galvanizing process |
| CN113957370A (en) * | 2021-10-29 | 2022-01-21 | 湖南省永神科技有限公司 | Street lamp pole galvanizing process |
| CN113969383A (en) * | 2021-10-26 | 2022-01-25 | 贵溪奥泰铜业有限公司 | Hot-dip plating method for copper wire |
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| CN113969383A (en) * | 2021-10-26 | 2022-01-25 | 贵溪奥泰铜业有限公司 | Hot-dip plating method for copper wire |
| CN113969383B (en) * | 2021-10-26 | 2023-04-07 | 贵溪奥泰铜业有限公司 | Hot-dip plating method for copper wire |
| CN113957370A (en) * | 2021-10-29 | 2022-01-21 | 湖南省永神科技有限公司 | Street lamp pole galvanizing process |
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