CN111992475A - Preparation method of guardrail with epoxy zinc-based polyester composite coating on surface - Google Patents
Preparation method of guardrail with epoxy zinc-based polyester composite coating on surface Download PDFInfo
- Publication number
- CN111992475A CN111992475A CN202010648676.7A CN202010648676A CN111992475A CN 111992475 A CN111992475 A CN 111992475A CN 202010648676 A CN202010648676 A CN 202010648676A CN 111992475 A CN111992475 A CN 111992475A
- Authority
- CN
- China
- Prior art keywords
- vertical pipe
- guardrail
- spraying
- pipe
- epoxy zinc
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
- B05D1/12—Applying particulate materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/22—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to internal surfaces, e.g. of tubes
- B05D7/222—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to internal surfaces, e.g. of tubes of pipes
- B05D7/225—Coating inside the pipe
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/50—Multilayers
- B05D7/52—Two layers
- B05D7/54—No clear coat specified
- B05D7/546—No clear coat specified each layer being cured, at least partially, separately
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2254/00—Tubes
- B05D2254/04—Applying the material on the interior of the tube
- B05D2254/06—Applying the material on the interior and exterior of the tube
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2451/00—Type of carrier, type of coating (Multilayers)
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2504/00—Epoxy polymers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2508/00—Polyesters
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
The invention provides a preparation method of a guardrail with a zinc epoxy-based polyester composite coating on the surface, which comprises the following steps: pre-treating; coating the epoxy zinc-based spraying raw material on the surfaces of the guardrail plate and the vertical pipe, and conveying the sprayed guardrail plate and the vertical pipe into a curing drying tunnel; sending the mixture to a refrigerating chamber to be cooled to room temperature; uniformly coating the polyester spraying raw material on the surface of the epoxy zinc-based coating, and curing to form the epoxy zinc-based polyester composite coating; cleaning the inner wall of the vertical pipe; spraying epoxy zinc-based spraying raw materials on the inner wall of the vertical pipe by using a spraying device on a long section of drill pipe; conveying the solidified vertical pipe to a refrigerating chamber to be cooled to room temperature; and uniformly coating the polyester spraying raw material on the surface of the epoxy zinc-based coating in the riser, and curing to form the epoxy zinc-based polyester composite coating. The guardrail prepared by the invention is bright and clean, has good naturalness, is not easy to stain, and can be naturally washed by rainwater; the salt spray resistance is good; has good humidity and heat resistance.
Description
Technical Field
The invention relates to the technical field of guardrail production, in particular to a preparation method of a guardrail with an epoxy zinc-based polyester composite coating on the surface.
Background
Guardrail-referred to herein as an industrial "guardrail". The guardrail is mainly used for protecting and protecting personal safety and equipment facilities in occasions such as houses, roads, commercial districts, public places and the like. The guard rail is visible everywhere in our lives.
The expressway guardrail is a life safety barrier, mainly comprises three types at present, namely a pure galvanized guardrail, which is the earliest form of corrosion prevention, is called as a first-generation guardrail product and is formed by hot galvanizing a guardrail blackboard; one is a 'hot galvanizing + polyester' guardrail, which is a second generation guardrail product, wherein a layer of polyester powder is sprayed on the hot galvanizing guardrail; the other type is a hot galvanizing and polyethylene guardrail, which is a third generation guardrail product formed by coating a layer of polyethylene powder on the hot galvanizing guardrail in a dipping way.
The iron base material has the protection function of the sacrificial anode, and the service life of the guardrail is prolonged. However, zinc is poor in acid and alkali resistance and corrosion resistance, is not suitable for environments with high humidity, acid and alkali property and coastal salt fog property, and a zinc layer becomes dark and black gradually after being exposed in air for a long time, so that the appearance is poor. The second generation hot galvanizing polyester guardrail, the polyester coating isolates the zinc layer from the external corrosive environment, the service life is further prolonged, the product can be used in high humidity, acidity and coastal salt fog environment, but the polyester powder is an electrostatic spraying process, the inner wall spraying of the upright column cannot be realized due to the technical bottleneck, in the long-term use process, the soil continuously corrodes the inner wall of the upright column, the corrosion is stronger on the contact surface of the soil and the air, so that the upright column is easy to break from the ground part, and the common defect of the first generation product and the second generation product is overcome. The third generation hot galvanizing dipping polyethylene guardrail basically eliminates the defects of the first two generations of products, the coating thickness is more than 2 times of that of polyester, and the polyethylene has excellent acid, alkali and salt corrosion resistance, so that the anti-corrosion performance and the service life of the guardrail are greatly prolonged, the guardrail can be basically suitable for the first three generations of products in most climatic environments without hot galvanizing, and the hot galvanizing has two problems, wherein the first generation of hot galvanizing process needs acid washing, and the second generation of hot galvanizing is an industry with high energy consumption and high pollution. The former causes the base material of the guardrail to have the risk of hydrogen embrittlement and corrosion, and the anti-collision capacity can be attenuated year by year in the long-term service process.
Disclosure of Invention
The invention aims to provide a preparation method of a guardrail with a zinc epoxy-based polyester composite coating on the surface, which has a simple structure and is convenient to operate and can effectively solve the problems in the background technology.
Aiming at the problems, the invention provides a preparation method of a guardrail with a zinc epoxy-based polyester composite coating on the surface, which comprises the following steps:
1) selecting corresponding grinding tools according to the shapes of the guardrail plate and the vertical pipe to grind the guardrail plate and the vertical pipe and clear impurities; spraying water vapor to the guardrail plate and the vertical pipe through an atomizing device, and cleaning the guardrail plate and the vertical pipe;
2) immersing the guardrail plate and the vertical pipe in a hydrochloric acid solution for 10-15 min, hanging the guardrail plate and the vertical pipe on a conveying chain, and washing with high-pressure water;
3) immersing the washed guardrail plate and the washed vertical pipe into a degreasing solution for degreasing, wherein the degreasing temperature is 40-50 ℃, and the time is 80-120S;
4) hanging the guardrail plate and the vertical pipe on a conveying chain, washing with high-pressure water, and conveying to a drying channel for drying, wherein the drying temperature is 95-105 ℃, and the drying time is 10-20 min;
5) coating epoxy zinc-based spraying raw materials on the surfaces of the guardrail plate and the vertical pipe by adopting paint film equipment, and conveying the sprayed guardrail plate and the vertical pipe into a curing drying tunnel, wherein the curing temperature is 130-150 ℃, and the curing time is 10-15 min;
6) conveying the solidified guardrail plate and the vertical pipe into a refrigerating chamber, spraying cooling water onto the guardrail plate and the vertical pipe in the refrigerating chamber, and cooling the temperature of the guardrail plate and the vertical pipe to room temperature;
7) uniformly coating the polyester spraying raw material on the surface of the epoxy zinc-based coating by adopting paint film equipment, and curing to form the epoxy zinc-based polyester composite coating;
8) blowing the inner wall of the vertical pipe by using compressed air, then starting a sand blasting device, spraying steel grit powered by the compressed air to the inner wall of the vertical pipe by using a spray gun head, and driving a dust remover to enter the vertical pipe by using the compressed air for powerful blowing;
9) spraying epoxy zinc-based spraying raw materials on the inner wall of the vertical pipe by using a spraying device on a long section of drill pipe, wherein the temperature of the pipe body is 170-190 ℃;
10) coating and curing the inner wall of the stand pipe, wherein the temperature of the pipe body is 210-230 ℃ during curing, and the curing time is 50-80 min;
11) conveying the solidified vertical pipe into a refrigerating chamber, spraying cooling water onto the vertical pipe in the refrigerating chamber, and cooling the temperature of the vertical pipe to room temperature;
12) the polyester spraying raw material is uniformly coated on the surface of the epoxy zinc-based coating in the vertical pipe by using a spraying device on a long section of drill pipe, and the epoxy zinc-based polyester composite coating is formed after curing.
The preferred scheme is as follows: the guardrail plate and the vertical pipe are fixed on the conveying chain through the adsorption magnet.
The preferred scheme is as follows: the concentration of the hydrochloric acid solution is 10-15%.
The preferred scheme is as follows: the degreasing solution is a phosphorus-free degreasing solution.
The preferred scheme is as follows: the thickness of the epoxy zinc-based polyester composite coating is 40-60 mu m.
The preferred scheme is as follows: the spraying device on the long section of drill rod comprises a male end bell mouth, a short section drill rod branch pipe extension section, a middle bell mouth, a female end bell mouth and a rotating assembly.
The preferred scheme is as follows: the public end horn mouth is used for being connected with vacuum apparatus for make nipple joint drilling rod branch pipe extension section and the inside vacuum that forms of nipple joint drilling rod, female end horn mouth is used for being connected with the play powder device of powder for the spraying.
The preferred scheme is as follows: the running speed of the conveying chain is 1-3 m/min.
The invention has the beneficial effects that:
1. the preparation method of the guardrail with the epoxy zinc-based polyester composite coating covering the surface provided by the invention replaces hot galvanizing, but still has the electrochemical protection effect of a zinc layer; polyester powder is used as a surface layer to make up the ultraviolet resistance deficiency of an epoxy system;
2. the spraying device on the long section of drill rod is adopted to spray the inner wall of the stand pipe, so that the problems of corrosion prevention of the inner wall of the stand column and uneven spraying are solved;
3. the preparation method provided by the invention is simple and convenient to operate, not only is the guardrail more convenient to convey, but also a large amount of manpower can be saved, the requirements of people can be met, and convenience is provided for people;
4. the guardrail prepared by the invention is bright and clean, has good naturalness, is not easy to stain, and can be naturally washed by rainwater; the salt spray resistance is good; has good humidity and heat resistance.
Detailed Description
The present invention is described in further detail below to enable those skilled in the art to practice the invention with reference to the description.
It will be understood that terms such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.
The technical solutions in the present disclosure will be clearly and completely described below. It is to be understood that the described embodiments are merely illustrative of some, and not restrictive, of the embodiments of the disclosure. The following detailed description of the disclosed embodiments is not intended to limit the scope of the disclosure, as claimed, but is merely representative of selected embodiments of the disclosure. Based on the embodiments of the present disclosure, those skilled in the art will not make any creative effort.
Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The use of the word "comprising" or "comprises", and the like, in this disclosure is intended to mean that the elements or items listed before that word, include the elements or items listed after that word, and their equivalents, without excluding other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may also include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
All other embodiments obtained below are within the scope of the present disclosure.
The invention provides a preparation method of a guardrail with a zinc epoxy-based polyester composite coating on the surface, which comprises the following steps:
1) selecting corresponding grinding tools according to the shapes of the guardrail plate and the vertical pipe to grind the guardrail plate and the vertical pipe and clear impurities; spraying water vapor to the guardrail plate and the vertical pipe through an atomizing device, and cleaning the guardrail plate and the vertical pipe;
2) immersing the guardrail plate and the vertical pipe in a hydrochloric acid solution for 10-15 min, hanging the guardrail plate and the vertical pipe on a conveying chain, and washing with high-pressure water;
3) immersing the washed guardrail plate and the washed vertical pipe into a degreasing solution for degreasing, wherein the degreasing temperature is 40-50 ℃, and the time is 80-120S;
4) hanging the guardrail plate and the vertical pipe on a conveying chain, washing with high-pressure water, and conveying to a drying channel for drying, wherein the drying temperature is 95-105 ℃, and the drying time is 10-20 min;
5) coating epoxy zinc-based spraying raw materials on the surfaces of the guardrail plate and the vertical pipe by adopting paint film equipment, and conveying the sprayed guardrail plate and the vertical pipe into a curing drying tunnel, wherein the curing temperature is 130-150 ℃, and the curing time is 10-15 min;
6) conveying the solidified guardrail plate and the vertical pipe into a refrigerating chamber, spraying cooling water onto the guardrail plate and the vertical pipe in the refrigerating chamber, and cooling the temperature of the guardrail plate and the vertical pipe to room temperature;
7) uniformly coating the polyester spraying raw material on the surface of the epoxy zinc-based coating by adopting paint film equipment, and curing to form the epoxy zinc-based polyester composite coating;
8) blowing the inner wall of the vertical pipe by using compressed air, then starting a sand blasting device, spraying steel grit powered by the compressed air to the inner wall of the vertical pipe by using a spray gun head, and driving a dust remover to enter the vertical pipe by using the compressed air for powerful blowing;
9) spraying epoxy zinc-based spraying raw materials on the inner wall of the vertical pipe by using a spraying device on a long section of drill pipe, wherein the temperature of the pipe body is 170-190 ℃;
10) coating and curing the inner wall of the stand pipe, wherein the temperature of the pipe body is 210-230 ℃ during curing, and the curing time is 50-80 min;
11) conveying the solidified vertical pipe into a refrigerating chamber, spraying cooling water onto the vertical pipe in the refrigerating chamber, and cooling the temperature of the vertical pipe to room temperature;
12) the polyester spraying raw material is uniformly coated on the surface of the epoxy zinc-based coating in the vertical pipe by using a spraying device on a long section of drill pipe, and the epoxy zinc-based polyester composite coating is formed after curing.
The preparation method of the guardrail with the epoxy zinc-based polyester composite coating covering the surface provided by the invention replaces hot galvanizing, but still has the electrochemical protection effect of a zinc layer; polyester powder is used as a surface layer to make up the ultraviolet resistance deficiency of an epoxy system; the spraying device on the long section of drill rod is adopted to spray the inner wall of the stand pipe, so that the problems of corrosion prevention of the inner wall of the stand column and uneven spraying are solved; the preparation method provided by the invention is simple and convenient to operate, not only is the guardrail more convenient to convey, but also a large amount of manpower can be saved, the requirements of people can be met, and convenience is provided for people; the guardrail prepared by the invention is bright and clean, has good naturalness, is not easy to stain, and can be naturally washed by rainwater; the salt spray resistance is good; has good humidity and heat resistance.
Example 1
The embodiment provides a preparation method of a guardrail with a zinc epoxy-based polyester composite coating on the surface, which comprises the following steps:
1) selecting corresponding grinding tools according to the shapes of the guardrail plate and the vertical pipe to grind the guardrail plate and the vertical pipe and clear impurities; spraying water vapor to the guardrail plate and the vertical pipe through an atomizing device, and cleaning the guardrail plate and the vertical pipe;
2) after the guardrail plate and the vertical pipe are immersed in a hydrochloric acid solution for 10min, hanging the guardrail plate and the vertical pipe on a conveying chain, and washing with high-pressure water, wherein the concentration of the hydrochloric acid solution is 10%;
3) immersing the washed guardrail plate and the washed vertical pipe into a degreasing solution for degreasing, wherein the degreasing temperature is 40 ℃, and the time is 80 seconds;
4) hanging the guardrail plate and the vertical pipe on a conveying chain through an adsorption magnet, washing the guardrail plate and the vertical pipe by using high-pressure water, and conveying the washed guardrail plate and the vertical pipe into a drying channel for drying, wherein the drying temperature is 95 ℃, the drying time is 10min, and the running speed of the conveying chain is 1 m/min;
5) coating epoxy zinc-based spraying raw materials on the surfaces of the guardrail plate and the vertical pipe by adopting paint film equipment, and conveying the sprayed guardrail plate and the vertical pipe into a curing drying channel, wherein the curing temperature is 130 ℃, and the curing time is 10 min;
6) conveying the solidified guardrail plate and the vertical pipe into a refrigerating chamber, spraying cooling water onto the guardrail plate and the vertical pipe in the refrigerating chamber, and cooling the temperature of the guardrail plate and the vertical pipe to room temperature;
7) uniformly coating the polyester spraying raw material on the surface of the epoxy zinc-based coating by adopting paint film equipment, and curing to form the epoxy zinc-based polyester composite coating;
8) blowing the inner wall of the vertical pipe by using compressed air, then starting a sand blasting device, spraying steel grit powered by the compressed air to the inner wall of the vertical pipe by using a spray gun head, and driving a dust remover to enter the vertical pipe by using the compressed air for powerful blowing;
9) spraying epoxy zinc-based spraying raw materials on the inner wall of the vertical pipe by using a spraying device on a long section of drill pipe, wherein the temperature of the pipe body is 170 ℃;
10) coating and curing the inner wall of the stand pipe, wherein the temperature of the pipe body is 210 ℃ during curing, and the curing time is 50 min;
11) conveying the solidified vertical pipe into a refrigerating chamber, spraying cooling water onto the vertical pipe in the refrigerating chamber, and cooling the temperature of the vertical pipe to room temperature;
12) and uniformly coating the polyester spraying raw material on the surface of the epoxy zinc-based coating in the vertical pipe by using a spraying device on a long section of drill pipe, and curing to obtain the epoxy zinc-based polyester composite coating, wherein the thickness of the epoxy zinc-based polyester composite coating is 40 mu m.
The product coated with the epoxy zinc-based polyester and obtained by the coating process has a smooth surface, good smoothness and naturalness, is not easy to stain, and can be naturally washed by rainwater; the salt spray resistance is good, the salt spray resistance reaches 4010 h, and under the same condition, the salt spray resistance of the common zinc alloy material is about 1000 h; the wet heat resistance is good, the wet heat resistance is up to 4010 hour, and under the same condition, the wet heat resistance of the common zinc alloy material is about 1000 hours.
Example 2
The embodiment provides a preparation method of a guardrail with a zinc epoxy-based polyester composite coating on the surface, which comprises the following steps:
1) selecting corresponding grinding tools according to the shapes of the guardrail plate and the vertical pipe to grind the guardrail plate and the vertical pipe and clear impurities; spraying water vapor to the guardrail plate and the vertical pipe through an atomizing device, and cleaning the guardrail plate and the vertical pipe;
2) after the guardrail plate and the vertical pipe are immersed in a hydrochloric acid solution for 15min, hanging the guardrail plate and the vertical pipe on a conveying chain, and washing with high-pressure water, wherein the concentration of the hydrochloric acid solution is 15%;
3) immersing the washed guardrail plate and the washed vertical pipe into a degreasing solution for degreasing, wherein the degreasing temperature is 50 ℃, and the time is 120S;
4) hanging the guardrail plate and the vertical pipe on a conveying chain, washing with high-pressure water, conveying to a drying channel for drying, wherein the drying temperature is 105 ℃, the drying time is 20min, and the running speed of the conveying chain is 3 m/min;
5) coating epoxy zinc-based spraying raw materials on the surfaces of the guardrail plate and the vertical pipe by adopting paint film equipment, and conveying the sprayed guardrail plate and the vertical pipe into a curing drying tunnel, wherein the curing temperature is 150 ℃, and the curing time is 15 min;
6) conveying the solidified guardrail plate and the vertical pipe into a refrigerating chamber, spraying cooling water onto the guardrail plate and the vertical pipe in the refrigerating chamber, and cooling the temperature of the guardrail plate and the vertical pipe to room temperature;
7) uniformly coating the polyester spraying raw material on the surface of the epoxy zinc-based coating by adopting paint film equipment, and curing to form the epoxy zinc-based polyester composite coating;
8) blowing the inner wall of the vertical pipe by using compressed air, then starting a sand blasting device, spraying steel grit powered by the compressed air to the inner wall of the vertical pipe by using a spray gun head, and driving a dust remover to enter the vertical pipe by using the compressed air for powerful blowing;
9) spraying epoxy zinc-based spraying raw materials on the inner wall of the vertical pipe by using a spraying device on a long section of drill pipe, wherein the temperature of the pipe body is 190 ℃;
10) coating and curing the inner wall of the stand pipe, wherein the temperature of the pipe body is 210-230 ℃ during curing, and the curing time is 80 min;
11) conveying the solidified vertical pipe into a refrigerating chamber, spraying cooling water onto the vertical pipe in the refrigerating chamber, and cooling the temperature of the vertical pipe to room temperature;
12) the polyester spraying raw material is uniformly coated on the surface of the epoxy zinc-based coating in the vertical pipe by using a spraying device on a long section of drill pipe, and is cured to form the epoxy zinc-based polyester composite coating, wherein the thickness of the epoxy zinc-based polyester composite coating is 60 mu m.
The product coated with the epoxy zinc-based polyester and obtained by the coating process has a smooth surface, good smoothness and naturalness, is not easy to stain, and can be naturally washed by rainwater; the salt spray resistance is good, the salt spray resistance reaches 4050 hours, and under the same condition, the salt spray resistance of the common zinc alloy material is about 1000 hours; the wet heat resistance is good, the wet heat resistance is up to 4050 hours, and under the same condition, the wet heat resistance of the common zinc alloy material is about 1000 hours.
Example 3
The embodiment provides a preparation method of a guardrail with a zinc epoxy-based polyester composite coating on the surface, which comprises the following steps:
1) selecting corresponding grinding tools according to the shapes of the guardrail plate and the vertical pipe to grind the guardrail plate and the vertical pipe and clear impurities; spraying water vapor to the guardrail plate and the vertical pipe through an atomizing device, and cleaning the guardrail plate and the vertical pipe;
2) after the guardrail plate and the vertical pipe are immersed in a hydrochloric acid solution for 13min, hanging the guardrail plate and the vertical pipe on a conveying chain, and washing with high-pressure water, wherein the concentration of the hydrochloric acid solution is 13%;
3) immersing the washed guardrail plate and the washed vertical pipe into a degreasing solution for degreasing, wherein the degreasing temperature is 45 ℃, and the time is 100 seconds, and the degreasing solution is a phosphorus-free degreasing solution;
4) hanging the guardrail plate and the vertical pipe on a conveying chain, washing with high-pressure water, conveying to a drying channel for drying, wherein the drying temperature is 100 ℃, the drying time is 15min, and the running speed of the conveying chain is 2 m/min;
5) coating epoxy zinc-based spraying raw materials on the surfaces of the guardrail plate and the vertical pipe by adopting paint film equipment, and conveying the sprayed guardrail plate and the vertical pipe into a curing drying tunnel, wherein the curing temperature is 140 ℃, and the curing time is 12 min;
6) conveying the solidified guardrail plate and the vertical pipe into a refrigerating chamber, spraying cooling water onto the guardrail plate and the vertical pipe in the refrigerating chamber, and cooling the temperature of the guardrail plate and the vertical pipe to room temperature;
7) uniformly coating the polyester spraying raw material on the surface of the epoxy zinc-based coating by adopting paint film equipment, and curing to form the epoxy zinc-based polyester composite coating;
8) blowing the inner wall of the vertical pipe by using compressed air, then starting a sand blasting device, spraying steel grit powered by the compressed air to the inner wall of the vertical pipe by using a spray gun head, and driving a dust remover to enter the vertical pipe by using the compressed air for powerful blowing;
9) spraying epoxy zinc-based spraying raw materials on the inner wall of a vertical pipe by using a spraying device on a long section of drill pipe, wherein the temperature of the pipe body is 180 ℃, the spraying device on the long section of drill pipe comprises a male-end bell mouth, a short-section drill pipe branch pipe extension section, a middle bell mouth, a female-end bell mouth and a rotating assembly, the male-end bell mouth is used for being connected with a vacuum device and enabling the short-section drill pipe branch pipe extension section and the short-section drill pipe to form vacuum, and the female-end bell mouth is used for being connected with a powder discharging device for spraying powder;
10) coating and curing the inner wall of the stand pipe, wherein the temperature of the pipe body is 210-230 ℃ during curing, and the curing time is 60 min;
11) conveying the solidified vertical pipe into a refrigerating chamber, spraying cooling water onto the vertical pipe in the refrigerating chamber, and cooling the temperature of the vertical pipe to room temperature;
12) the polyester spraying raw material is uniformly coated on the surface of the epoxy zinc-based coating in the vertical pipe by using a spraying device on a long section of drill pipe, and is cured to form the epoxy zinc-based polyester composite coating, wherein the thickness of the epoxy zinc-based polyester composite coating is 50 mu m.
The product coated with the epoxy zinc-based polyester and obtained by the coating process has a smooth surface, good smoothness and naturalness, is not easy to stain, and can be naturally washed by rainwater; the salt spray resistance is good, the salt spray resistance reaches 4030 hours, and under the same condition, the salt spray resistance of the common zinc alloy material is about 1000 hours; the wet heat resistance is good, the wet heat resistance reaches 4030 hours, and under the same condition, the wet heat resistance of a common zinc alloy material is about 1000 hours.
While embodiments of the invention have been disclosed above, it is not limited to the applications listed in the description and the embodiments, which are fully applicable in all kinds of fields of application of the invention, and further modifications may readily be effected by those skilled in the art, so that the invention is not limited to the specific details without departing from the general concept defined by the claims and the scope of equivalents.
Claims (8)
1. The preparation method of the guardrail with the epoxy zinc-based polyester composite coating on the surface is characterized by comprising the following steps of:
1) selecting corresponding grinding tools according to the shapes of the guardrail plate and the vertical pipe to grind the guardrail plate and the vertical pipe and clear impurities; spraying water vapor to the guardrail plate and the vertical pipe through an atomizing device, and cleaning the guardrail plate and the vertical pipe;
2) immersing the guardrail plate and the vertical pipe in a hydrochloric acid solution for 10-15 min, hanging the guardrail plate and the vertical pipe on a conveying chain, and washing with high-pressure water;
3) immersing the washed guardrail plate and the washed vertical pipe into a degreasing solution for degreasing, wherein the degreasing temperature is 40-50 ℃, and the time is 80-120S;
4) hanging the guardrail plate and the vertical pipe on a conveying chain, washing with high-pressure water, and conveying to a drying channel for drying, wherein the drying temperature is 95-105 ℃, and the drying time is 10-20 min;
5) coating epoxy zinc-based spraying raw materials on the surfaces of the guardrail plate and the vertical pipe by adopting paint film equipment, and conveying the sprayed guardrail plate and the vertical pipe into a curing drying tunnel, wherein the curing temperature is 130-150 ℃, and the curing time is 10-15 min;
6) conveying the solidified guardrail plate and the vertical pipe into a refrigerating chamber, spraying cooling water onto the guardrail plate and the vertical pipe in the refrigerating chamber, and cooling the temperature of the guardrail plate and the vertical pipe to room temperature;
7) uniformly coating the polyester spraying raw material on the surface of the epoxy zinc-based coating by adopting paint film equipment, and curing to form the epoxy zinc-based polyester composite coating;
8) blowing the inner wall of the vertical pipe by using compressed air, then starting a sand blasting device, spraying steel grit powered by the compressed air to the inner wall of the vertical pipe by using a spray gun head, and driving a dust remover to enter the vertical pipe by using the compressed air for powerful blowing;
9) spraying epoxy zinc-based spraying raw materials on the inner wall of the vertical pipe by using a spraying device on a long section of drill pipe, wherein the temperature of the pipe body is 170-190 ℃;
10) coating and curing the inner wall of the stand pipe, wherein the temperature of the pipe body is 210-230 ℃ during curing, and the curing time is 50-80 min;
11) conveying the solidified vertical pipe into a refrigerating chamber, spraying cooling water onto the vertical pipe in the refrigerating chamber, and cooling the temperature of the vertical pipe to room temperature;
12) the polyester spraying raw material is uniformly coated on the surface of the epoxy zinc-based coating in the vertical pipe by using a spraying device on a long section of drill pipe, and the epoxy zinc-based polyester composite coating is formed after curing.
2. The method for manufacturing a guardrail with a zinc-epoxy-based polyester composite coating on the surface as claimed in claim 1, wherein the guardrail plate and the vertical pipe are fixed on the conveying chain by an absorption magnet.
3. The preparation method of the guardrail with the epoxy zinc-based polyester composite coating on the surface as claimed in claim 1, wherein the concentration of the hydrochloric acid solution is 10-15%.
4. The method for manufacturing a guardrail with a surface coated with an epoxy zinc-based polyester composite coating according to claim 1, wherein the degreasing solution is a phosphorus-free degreasing solution.
5. The preparation method of the guardrail with the epoxy zinc-based polyester composite coating on the surface as claimed in claim 1, wherein the thickness of the epoxy zinc-based polyester composite coating is 40-60 μm.
6. The method for manufacturing a guardrail with a zinc-based epoxy polyester composite coating on the surface as claimed in claim 1, wherein the spraying device on the long section of drill pipe comprises a male-end bell mouth, a short-section drill pipe branch pipe extension section, an intermediate bell mouth, a female-end bell mouth and a rotating assembly.
7. The preparation method of the guardrail with the epoxy zinc-based polyester composite coating on the surface as claimed in claim 6, wherein the male end bell mouth is used for being connected with a vacuum device and enabling the extension section of the branch pipe of the short section drill pipe and the interior of the short section drill pipe to form vacuum, and the female end bell mouth is used for being connected with a powder discharging device for spraying powder.
8. The preparation method of the guardrail with the epoxy zinc-based polyester composite coating on the surface as claimed in claim 1, wherein the running speed of the conveying chain is 1-3 m/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010648676.7A CN111992475A (en) | 2020-07-07 | 2020-07-07 | Preparation method of guardrail with epoxy zinc-based polyester composite coating on surface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010648676.7A CN111992475A (en) | 2020-07-07 | 2020-07-07 | Preparation method of guardrail with epoxy zinc-based polyester composite coating on surface |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111992475A true CN111992475A (en) | 2020-11-27 |
Family
ID=73466730
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010648676.7A Pending CN111992475A (en) | 2020-07-07 | 2020-07-07 | Preparation method of guardrail with epoxy zinc-based polyester composite coating on surface |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111992475A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115155996A (en) * | 2022-06-14 | 2022-10-11 | 中电建路桥集团有限公司 | Production method of epoxy zinc-based polyester composite coating guardrail |
| EP4372187A1 (en) * | 2022-11-18 | 2024-05-22 | Balak Coatings nv | An optimally coated twin-wire fence panel and method for that purpose |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105817839A (en) * | 2016-04-21 | 2016-08-03 | 滁州博昊门业制造有限公司 | Production technical process of zinc-steel guardrails |
| CN109513597A (en) * | 2018-12-28 | 2019-03-26 | 博盾科技(浙江)有限公司 | A kind of surface preservative treatment technique of guardrail zinc alloy section |
| CN110142192A (en) * | 2019-06-06 | 2019-08-20 | 甘肃路桥新锐交通科技有限责任公司 | The two-in-one composite coating spraying method of highway guard rail upright post, corrugated guardrail plate |
| CN110369245A (en) * | 2019-07-31 | 2019-10-25 | 上海图博可特石油管道涂层有限公司 | A kind of pipe nipple drilling rod powder inner coating spraying method |
-
2020
- 2020-07-07 CN CN202010648676.7A patent/CN111992475A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105817839A (en) * | 2016-04-21 | 2016-08-03 | 滁州博昊门业制造有限公司 | Production technical process of zinc-steel guardrails |
| CN109513597A (en) * | 2018-12-28 | 2019-03-26 | 博盾科技(浙江)有限公司 | A kind of surface preservative treatment technique of guardrail zinc alloy section |
| CN110142192A (en) * | 2019-06-06 | 2019-08-20 | 甘肃路桥新锐交通科技有限责任公司 | The two-in-one composite coating spraying method of highway guard rail upright post, corrugated guardrail plate |
| CN110369245A (en) * | 2019-07-31 | 2019-10-25 | 上海图博可特石油管道涂层有限公司 | A kind of pipe nipple drilling rod powder inner coating spraying method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115155996A (en) * | 2022-06-14 | 2022-10-11 | 中电建路桥集团有限公司 | Production method of epoxy zinc-based polyester composite coating guardrail |
| EP4372187A1 (en) * | 2022-11-18 | 2024-05-22 | Balak Coatings nv | An optimally coated twin-wire fence panel and method for that purpose |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101451243B (en) | Method and process of steel structure arc spraying composite corrosion proof coating system | |
| CN111992475A (en) | Preparation method of guardrail with epoxy zinc-based polyester composite coating on surface | |
| CN102517537B (en) | Method for composite coating of wind generating set brake disc | |
| CN105665261A (en) | Spray-coating process for plastic-sprayed power steel pipe rod | |
| CN101724215B (en) | Adsorption/transparent/peelable protective film developed after polyvinyl alcohol modification | |
| CN104895479B (en) | A kind of method using galvanizing electrostatic plastic spraying tubular object extruding to produce electric extendable door | |
| CN102518333A (en) | Pollution flashover-prevention, corrosion-prevention and freezing-prevention electric tower and surface treatment method thereof | |
| CN109396002A (en) | Steel structure anti-corrosion paint construction technology | |
| CN105065852B (en) | Construction method for laying pressure penstock inside water tunnel of hydropower station | |
| CN105413993A (en) | Steel structure fluorocarbon paint coating process | |
| CN111729827A (en) | Production method of green energy-saving environment-friendly fluorine-carbon aluminum veneer | |
| CN109848863A (en) | The method of wind-power tower surface treatment | |
| CN101852315B (en) | Manufacturing method of steel rotational moulding pipeline with modified polypropylene inner liner | |
| CN201056675Y (en) | Thermal zinc spraying and dip plastic freeway guardrail | |
| CN105114708A (en) | Processing method of corrosion-resistant uvioresistant exposed steel gas pipeline | |
| CN102276164A (en) | Process for performing vacuum plating on glass | |
| CN102463213B (en) | Construction method of fire-retardant coating for benzene hydrogenation engineering steel structure | |
| CN106833282A (en) | A kind of japanning and its spraying coating process for Rail Surface antirust | |
| CN112280481A (en) | Nano waterproof coating and waterproof method thereof | |
| CN1704639A (en) | Three-layer structured polypropylene anticorrosive technology for steel buried transportation pipe | |
| CN102966842B (en) | Gas cylinder for vehicles with surface coatings and preparation method thereof | |
| KR100916821B1 (en) | Environmentally friendly manufacturing methods of metal street lamp | |
| CN102108480A (en) | New hot spraying zinc anticorrosion process of steel tube rod | |
| CN103537421B (en) | The long-acting coating process in oil & gas equipment metal surface | |
| CN114405788B (en) | Corrosion prevention method for brine collecting and transporting device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20201127 |
|
| RJ01 | Rejection of invention patent application after publication |