CN113774304A - Economical and practical hot galvanizing process - Google Patents
Economical and practical hot galvanizing process Download PDFInfo
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- CN113774304A CN113774304A CN202111096053.4A CN202111096053A CN113774304A CN 113774304 A CN113774304 A CN 113774304A CN 202111096053 A CN202111096053 A CN 202111096053A CN 113774304 A CN113774304 A CN 113774304A
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- 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
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- 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
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- 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
- C23C2/26—After-treatment
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- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Coating With Molten Metal (AREA)
Abstract
The invention discloses an economical and practical hot galvanizing process method, which belongs to the technical field of hot galvanizing and comprises the following steps: s1, preparation of processing: inspecting the surface of the part to be processed; s2, feeding: hoisting the material subjected to the processing preparation to a working place through a crane; s3, removing rust; s4, washing with water; s5, drying: hoisting the cleaned workpiece out of the rust removal tank, and drying; s6, hot galvanizing: hoisting the dried workpiece into a galvanizing bath for hot galvanizing treatment; s7, cooling; s8, passivating; s9, detection: lifting the workpiece out of the passivation tank, and detecting the workpiece; s10, inserting the wire; s11, packaging: the invention can realize the integrated production of the production line; drying and preheating reduce hot galvanizing time, prolong the service life of a zinc pot and reduce zinc consumption; the method has the advantages of low production cost, long service life, economic and practical property, and can improve the process treatment efficiency and the quality of workpieces.
Description
Technical Field
The invention relates to the technical field of hot galvanizing, in particular to an economical and practical hot galvanizing process.
Background
The hot galvanizing, also called hot dip galvanizing and hot dip galvanizing, is to dip the steel member after rust removal into molten zinc at about 500 ℃ to make the surface of the steel member adhere with a zinc layer, thereby achieving the purpose of corrosion prevention. The method is an effective metal corrosion prevention mode and is mainly used for metal structure facilities in various industries. Hot galvanizing has evolved from an older hot dip process, and has been in the past one hundred and eighty years since the industrial use of hot galvanizing in france in 1836. However, the hot galvanizing industry has been developed on a large scale in recent decades with the rapid development of cold-rolled steel strips.
In the prior art, the hot galvanizing process has high energy consumption, and the zinc coating has poor thickness uniformity, corrosion resistance, surface hardness and wear resistance, so that the actual using effect is influenced.
Disclosure of Invention
The invention aims to provide an economical and practical hot galvanizing process method, which can realize the integrated production of a production line; drying and preheating reduce hot galvanizing time, prolong the service life of a zinc pot and reduce zinc consumption; the method has the advantages of low production cost, long service life, economic and practical property, and can improve the process treatment efficiency and the quality of workpieces.
In order to solve the problems, the invention adopts the following technical scheme:
an economical and practical hot galvanizing process method comprises the following steps:
s1, preparation of processing: inspecting the surface of the part to be processed;
s2, feeding: hoisting the material subjected to the processing preparation to a working place through a crane;
s3, removing rust; hoisting a workpiece to be processed into a rust removal tank, and pouring hydrochloric acid into the rust removal tank;
s4, washing: the rust cleaning pool is taken out of the workpiece after the workpiece is soaked, rust which is not cleaned on the surface of the workpiece is cleaned, and after the cleaning is finished, the workpiece is hung into the cleaning pool to be repeatedly washed:
s5, drying: hoisting the cleaned workpiece out of the rust removal tank, and drying;
s6, hot galvanizing: hoisting the dried workpiece into a galvanizing bath for hot galvanizing treatment;
s7, cooling: lifting the galvanized workpiece out, and cooling the surface of the workpiece;
s8, passivation: hoisting the cooled workpiece into a passivation pool for passivation;
s9, detection: after the passivation is finished, the workpiece is lifted out of the passivation pool and is detected;
s10, offline: hanging the workpiece meeting the detection requirement on a conveying device to finish off-line;
s11, packaging: and packaging the galvanized workpieces.
As a preferable embodiment of the present invention, in step S1, it is necessary to check whether or not the outer surface of the workpiece has oil stains and whether or not there is a mask, and if there is any, to perform cleaning and check the perpendicularity of the workpiece, and if there is a difference, to correct the perpendicularity and check the flatness of the surface of the workpiece, and if there are uneven points, to perform processing.
In a preferred embodiment of the present invention, the soaking time in step S3 is 20 minutes, and the hydrochloric acid concentration is 20%.
In a preferred embodiment of the present invention, a plating assistant is added in step S4, and the plating assistant comprises: 50% zinc chloride and 50% ammonium chloride in water.
In a preferred embodiment of the present invention, the drying oven is used for processing in step S5, and the temperature inside the drying oven is between 150 ℃ and 180 ℃, and the drying time is between 3 minutes and 5 minutes.
As a preferable scheme of the present invention, the temperature inside the galvanizing bath is between 440 and 450 ℃ in step S6, and the actual soaking time is changed according to the thickness of the workpiece.
In a preferred embodiment of the present invention, in step S7, one of water cooling and air cooling is used, wherein the cooling temperature is between 50 ℃ and 70 ℃.
In a preferred embodiment of the present invention, the temperature of the passivation bath is normal temperature and the passivation time is 20 seconds in step S8.
As a preferred embodiment of the present invention, the thickness of the zinc coating layer is detected in step S9, and the thickness is selected according to actual use requirements.
Compared with the prior art, the invention has the advantages that:
the scheme can realize the integrated production of the assembly line; drying and preheating reduce hot galvanizing time, prolong the service life of a zinc pot and reduce zinc consumption; the method has the advantages of low production cost, long service life, economic and practical property, and can improve the process treatment efficiency and the quality of workpieces.
Drawings
FIG. 1 is a flow chart of the operation of the present invention.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example (b):
referring to fig. 1, an economical and practical hot galvanizing process includes the following steps:
s1, preparation of processing: inspecting the surface of the part to be processed;
s2, feeding: hoisting the material subjected to the processing preparation to a working place through a crane;
s3, removing rust; hoisting a workpiece to be processed into a rust removal tank, and pouring hydrochloric acid into the rust removal tank;
s4, washing: the rust cleaning pool is taken out of the workpiece after the workpiece is soaked, rust which is not cleaned on the surface of the workpiece is cleaned, and after the cleaning is finished, the workpiece is hung into the cleaning pool to be repeatedly washed:
s5, drying: hoisting the cleaned workpiece out of the rust removal tank, and drying;
s6, hot galvanizing: hoisting the dried workpiece into a galvanizing bath for hot galvanizing treatment;
s7, cooling: lifting the galvanized workpiece out, and cooling the surface of the workpiece;
s8, passivation: hoisting the cooled workpiece into a passivation pool for passivation;
s9, detection: after the passivation is finished, the workpiece is lifted out of the passivation pool and is detected;
s10, offline: hanging the workpiece meeting the detection requirement on a conveying device to finish off-line;
s11, packaging: and packaging the galvanized workpieces.
Specifically, whether the outer surface of the workpiece has oil stains or not is required to be checked in the step S1, whether a shielding object exists or not is required to be checked, if yes, the workpiece is cleaned, the verticality of the workpiece is checked, if a difference exists, the verticality is corrected, the flatness of the surface of the workpiece is checked, if a concave-convex point exists, the workpiece needs to be processed, after detection is completed, subsequent processing quality and processing effect can be further guaranteed, the defective rate can be effectively reduced, the production cost is reduced, and the economy is improved.
Specifically, the soaking time in the step S3 is 20 minutes, the concentration of hydrochloric acid is 20%, and the rust on the surface of the workpiece can be removed under the action of hydrochloric acid, so that the working efficiency is improved, and the labor intensity is reduced.
Specifically, in step S4, a plating assistant is added, and the plating assistant comprises the following components: the water diluter of 50% zinc chloride and 50% ammonium chloride can further clear away the impurity such as residual molysite and the iron oxide that does not remove on the work piece surface and can be favorable to reducing the surface tension of zinc liquid under the effect of plating assistant agent to can further promote the quality and the effect of zinc-plating, the practicality is extremely strong.
Specifically, the drying box is adopted for processing in the step S5, the temperature inside the drying box is 150-180 ℃, and the drying time is 3-5 minutes, so that the working period can be effectively shortened, and the working efficiency is improved.
Specifically, in the step S6, the temperature inside the galvanizing bath is 440 to 450 ℃, and the actual soaking time is changed according to the thickness of the workpiece, so that the galvanizing requirements of workpieces with different thicknesses can be met, and the applicability is improved.
Specifically, in step S7, one of water cooling and air cooling is adopted, wherein the cooling temperature is 50-70 ℃, and the effect and quality of galvanization are not affected while the cooling effect is ensured.
Specifically, in the step S8, the temperature of the passivation tank is normal temperature, the passivation time is 20 seconds, and after the passivation treatment, the passivation tank has the characteristics of absolutely not increasing the thickness of the workpiece and changing the color, so that the precision and the added value of the product are improved, and the operation is more convenient; the passivator can be repeatedly added for use, so the service life is longer and the cost is more economic; the passivation promotes the formation of an oxygen molecular structure passivation film on the metal surface, the film layer is compact and stable in performance, and the self-repairing effect is achieved in the air, so that compared with the traditional method for coating anti-rust oil, the passivation film formed by passivation is more stable and more corrosion-resistant.
Specifically, the thickness of the zinc coating is detected in step S9, and the thickness is selected according to actual use requirements, so that processing and manufacturing of different workpieces can be better realized.
The working principle is as follows:
s1, preparation of processing: the surface of a part to be processed is inspected, whether oil stains exist on the outer surface of a workpiece or not is to be inspected, whether a shielding object exists or not is to be inspected, if so, cleaning is carried out, the verticality of the workpiece is inspected, if differences exist, the verticality is corrected, the flatness of the surface of the workpiece is inspected, if concave and convex points exist, treatment is carried out, and after detection is finished, subsequent processing quality and processing effect can be further guaranteed, so that the defective rate can be effectively reduced, the production cost is reduced, and the economy is improved;
s2, feeding: hoisting the material subjected to the processing preparation to a working place through a crane;
s3, removing rust; a workpiece to be processed is hung into a rust removal tank, hydrochloric acid is poured into the rust removal tank, the soaking time is 20 minutes, the concentration of the hydrochloric acid is 20%, rust on the surface of the workpiece can be removed under the action of the hydrochloric acid, the working efficiency is improved, and the labor intensity is reduced;
s4, washing: the workpiece after being soaked is taken out of the rust removal tank, rust which is not cleaned on the surface of the workpiece is cleaned, after the cleaning is finished, the workpiece is hung into the cleaning tank and repeatedly washed, a plating assistant agent is added into the rust removal tank, and the plating assistant agent comprises the following components: the water diluter of 50% zinc chloride and 50% ammonium chloride can further clear away remaining molysite and the iron oxide that does not remove on the work piece surface and can be favorable to reducing the surface tension of zinc liquid under the effect of helping the plating agent to can further promote the quality and the effect of zinc-plating, the practicality is extremely strong:
s5, drying: the cleaned workpiece is lifted out of the rust removal tank and is dried, a drying box is used for processing, the temperature inside the drying box is 150-180 ℃, and the drying time is 3-5 minutes, so that the working period can be effectively shortened, and the working efficiency is improved;
s6, hot galvanizing: the dried workpiece is hung into a galvanizing bath for hot galvanizing treatment, the temperature in the galvanizing bath is 440-450 ℃, and the actual soaking time is changed according to the thickness of the workpiece, so that the galvanizing requirements of workpieces with different thicknesses can be met, and the applicability is improved;
s7, cooling: hoisting the galvanized workpiece out, cooling the surface of the workpiece, and adopting one of water cooling and air cooling, wherein the cooling temperature is 50-70 ℃, and the galvanizing effect and quality cannot be influenced under the condition of ensuring the cooling effect;
s8, passivation: the cooled workpiece is hung in a passivation tank for passivation, the temperature of the passivation tank is normal temperature, the passivation time is 20 seconds, the workpiece has the characteristics of absolutely not increasing the thickness of the workpiece and changing the color after passivation treatment, the precision and the added value of the product are improved, and the operation is more convenient; the passivator can be repeatedly added for use, so the service life is longer and the cost is more economic; the passivation promotes the formation of an oxygen molecular structure passivation film on the metal surface, the film layer is compact and stable in performance, and the self-repairing effect is achieved in the air, so that compared with the traditional method for coating anti-rust oil, the passivation film formed by passivation is more stable and more corrosion resistant;
s9, detection: after passivation is completed, the workpiece is lifted out of the passivation tank, the passivation tank is detected, the thickness of a zinc coating is detected, the thickness is selected according to actual use requirements, and processing and manufacturing of different workpieces can be better realized;
s10, offline: hanging the workpiece meeting the detection requirement on a conveying device to finish off-line;
s11, packaging: and packaging the galvanized workpieces.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the equivalent replacement or change according to the technical solution and the modified concept of the present invention should be covered by the scope of the present invention.
Claims (9)
1. An economical and practical hot galvanizing process is characterized by comprising the following steps:
s1, preparation of processing: inspecting the surface of the part to be processed;
s2, feeding: hoisting the material subjected to the processing preparation to a working place through a crane;
s3, removing rust; hoisting a workpiece to be processed into a rust removal tank, and pouring hydrochloric acid into the rust removal tank;
s4, washing: the rust cleaning pool is taken out of the workpiece after the workpiece is soaked, rust which is not cleaned on the surface of the workpiece is cleaned, and after the cleaning is finished, the workpiece is hung into the cleaning pool to be repeatedly washed:
s5, drying: hoisting the cleaned workpiece out of the rust removal tank, and drying;
s6, hot galvanizing: hoisting the dried workpiece into a galvanizing bath for hot galvanizing treatment;
s7, cooling: lifting the galvanized workpiece out, and cooling the surface of the workpiece;
s8, passivation: hoisting the cooled workpiece into a passivation pool for passivation;
s9, detection: after the passivation is finished, the workpiece is lifted out of the passivation pool and is detected;
s10, offline: hanging the workpiece meeting the detection requirement on a conveying device to finish off-line;
s11, packaging: and packaging the galvanized workpieces.
2. An economical and practical hot galvanizing process according to claim 1, characterized in that: in step S1, it is necessary to check whether the outer surface of the workpiece has oil stains or a blocking object, if so, to clean the workpiece, check the perpendicularity of the workpiece, if there is a difference, to correct the perpendicularity, check the flatness of the surface of the workpiece, and if there are concave and convex points, to perform processing.
3. An economical and practical hot galvanizing process according to claim 1, characterized in that: the soaking time in step S3 was 20 minutes, and the concentration of hydrochloric acid was 20%.
4. An economical and practical hot dip galvanizing process according to claim 1, characterized in that a plating assistant is added in step S4, and the plating assistant comprises the following components: 50% zinc chloride and 50% ammonium chloride in water.
5. An economical and practical hot galvanizing process according to claim 1, characterized in that: and S5, processing by adopting a drying box, wherein the temperature inside the drying box is between 150 and 180 ℃, and the drying time is 3 to 5 minutes.
6. An economical and practical hot galvanizing process according to claim 1, characterized in that: the temperature inside the galvanizing bath is 440 to 450 ℃ in step S6, and the actual soaking time is changed according to the thickness of the workpiece.
7. An economical and practical hot galvanizing process according to claim 1, characterized in that: in step S7, one of water cooling and air cooling is adopted, wherein the cooling temperature is 50-70 ℃.
8. An economical and practical hot galvanizing process according to claim 1, characterized in that: in step S8, the temperature of the passivation bath is normal temperature, and the passivation time is 20 seconds.
9. An economical and practical hot galvanizing process according to claim 1, characterized in that: the thickness of the galvanized layer is detected in step S9, and the thickness is selected according to actual use requirements.
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| CN202111096053.4A CN113774304A (en) | 2021-09-18 | 2021-09-18 | Economical and practical hot galvanizing process |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116043154A (en) * | 2023-04-03 | 2023-05-02 | 成都青冶正星金属制品有限公司 | Continuous hot dip galvanizing production line for flexible section bar |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104561876A (en) * | 2014-12-30 | 2015-04-29 | 广东运通热镀锌厂有限公司 | Hot galvanizing technical method |
| CN111074188A (en) * | 2019-12-30 | 2020-04-28 | 安徽皖鑫锌业科技有限责任公司 | Hot galvanizing processing technology |
| CN111945091A (en) * | 2019-05-15 | 2020-11-17 | 扬州澳洋顺昌金属材料有限公司 | Galvanizing production process |
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2021
- 2021-09-18 CN CN202111096053.4A patent/CN113774304A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104561876A (en) * | 2014-12-30 | 2015-04-29 | 广东运通热镀锌厂有限公司 | Hot galvanizing technical method |
| CN111945091A (en) * | 2019-05-15 | 2020-11-17 | 扬州澳洋顺昌金属材料有限公司 | Galvanizing production process |
| CN111074188A (en) * | 2019-12-30 | 2020-04-28 | 安徽皖鑫锌业科技有限责任公司 | Hot galvanizing processing technology |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116043154A (en) * | 2023-04-03 | 2023-05-02 | 成都青冶正星金属制品有限公司 | Continuous hot dip galvanizing production line for flexible section bar |
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