CN112742682A - Novel anticorrosive coating process - Google Patents
Novel anticorrosive coating process Download PDFInfo
- Publication number
- CN112742682A CN112742682A CN201911035901.3A CN201911035901A CN112742682A CN 112742682 A CN112742682 A CN 112742682A CN 201911035901 A CN201911035901 A CN 201911035901A CN 112742682 A CN112742682 A CN 112742682A
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- China
- Prior art keywords
- workpiece
- coating process
- anticorrosion
- spraying
- powder
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Classifications
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- 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
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- 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
- B05D7/14—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 metal, e.g. car bodies
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- 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
- B05D7/544—No clear coat specified the first layer is let to dry at least partially before applying the second layer
-
- 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)
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
Compared with the widely adopted anticorrosion coating process at present, the mode of firstly spraying paint can improve the binding force between the anticorrosion layer and the zinc coating on the surface of the base body, prevent the anticorrosion layer from falling off, ensure that the powder layer is generally compact, and form a compact covering layer when sprayed on the outermost surface to prevent the erosion of air and water vapor. The anticorrosion coating process slows down the corrosion speed of air to a zinc coating, greatly prolongs the anticorrosion life of a base body, and can prolong the anticorrosion life by 80 years compared with the existing zinc plating anticorrosion for 50 years.
Description
Technical Field
The invention relates to the field of metal anticorrosion processes, in particular to a novel anticorrosion coating process.
Background
The hot dip galvanizing is to dip the steel member after rust removal into zinc liquid melted at high temperature of about 500 ℃ to attach a zinc layer on the surface of the steel member, thereby achieving the purpose of corrosion prevention. Because of long endurance life and stable quality, the steel plate is widely applied to outdoor steel structures which are seriously corroded by atmosphere and are difficult to maintain, such as a large number of power transmission towers, communication towers, parts with high corrosion resistance requirements and the like. In recent years, hot dip galvanizing corrosion prevention is also widely adopted in a large number of light steel structure systems, automobile steel plates, and various parts, and plays an increasingly important role in corrosion protection.
The corrosion-resistant service life of a galvanized part can reach 50 years at most, but the design service life of some projects is 80 years or 100 years at present, so that the corrosion-resistant requirements of some projects cannot be completely met only by adopting a galvanizing mode, and therefore, the technical problem of how to enable the corrosion-resistant service life of a workpiece to reach the required service life of the project design is urgently needed to be solved in the industry.
The method of firstly spraying powder and then spraying paint is generally adopted because the powder layer can be solidified by heating at high temperature, but the method has the problems of weak combination of the powder layer and the galvanized surface, poor compactness of formed film and the like.
Disclosure of Invention
The invention aims to provide a novel anticorrosive coating process with the anticorrosive service life of more than 80 years. The technical scheme adopted by the invention is as follows:
a novel anticorrosion coating process comprises the following steps:
1) shot blasting: automatically performing shot blasting on the workpiece, wherein the shot blasting speed is selected to be 70m/s, and the advancing speed of the workpiece is 1-10 m/min;
2) galvanizing: putting the workpiece into a galvanizing solution for hot dipping;
3) sand blasting: moving the workpiece through a sand blasting chamber for sand blasting treatment;
4) painting: spraying primer on the surface of the workpiece;
5) powder spraying: and spraying powder on the surface of the workpiece.
Preferably, the primer is a high temperature resistant and conductive paint.
Preferably, the step of spraying paint further comprises a step of drying, wherein the drying temperature is 60-80 ℃.
Preferably, the step 5) of spraying powder comprises the following steps: firstly, spraying powder on the workpiece for 30s, then heating the workpiece after powder spraying to 100-230 ℃ for curing treatment, maintaining for 30-60 min, and then cooling to room temperature, wherein the front surface of the film layer is more than or equal to 40 mu m.
Preferably, the sand blasting efficiency in the step 3) is 10-30 m2/h。
Preferably, the curing treatment is carried out by an oven, the temperature of the oven is 160 +/-5 ℃, the curing time is 30-35 min, and after cooling, the workpiece is polished.
The invention has the beneficial effects that: compared with the existing widely adopted anticorrosion coating process, the method of firstly spraying paint and then spraying powder is adopted after galvanizing, the mode of firstly spraying paint can improve the binding force of the anticorrosion layer and the zinc coating on the surface of the substrate, so that the anticorrosion layer is prevented from falling off, the powder layer is generally compact, and a compact covering layer can be formed by spraying the powder layer on the outermost surface, so that the erosion of air and moisture is prevented. The anticorrosion coating process slows down the corrosion speed of air to a zinc coating, greatly prolongs the anticorrosion life of a base body, and can prolong the anticorrosion life by 80 years compared with the existing zinc plating anticorrosion for 50 years.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments.
A novel anticorrosion coating process comprises the following steps:
1) shot blasting: automatically performing shot blasting on the workpiece, wherein the shot blasting speed is selected to be 70m/s, and the advancing speed of the workpiece is 1-10 m/min;
2) galvanizing: putting the workpiece into a galvanizing solution for hot dipping;
3) sand blasting: moving the workpiece through a sand blasting chamber for sand blasting treatment, wherein the sand blasting efficiency is 10-30 m 2/h. (ii) a
4) Painting: and spraying primer on the surface of the workpiece, wherein the primer is high-temperature-resistant and conductive paint, and is dried after spraying paint at the drying temperature of 60-80 ℃ in order to ensure the quality and efficiency of powder spraying in the following steps.
5) Powder spraying: and (3) spraying powder on the surface of the workpiece, specifically, spraying powder on the workpiece for 30s, heating the workpiece after powder spraying to 100-230 ℃ for curing, maintaining for 30-60 min, and cooling to room temperature, wherein the thickness of the film layer is more than or equal to 40 mu m on the front side.
Preferably, the curing treatment is carried out by an oven, the temperature of the oven is 160 +/-5 ℃, the curing time is 30-35 min, and after cooling, the workpiece is polished.
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 technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (6)
1. A novel anticorrosion coating process is characterized by comprising the following steps:
shot blasting: automatically performing shot blasting on the workpiece, wherein the shot blasting speed is selected to be 70m/s, and the advancing speed of the workpiece is 1-10 m/min;
galvanizing: putting the workpiece into a galvanizing solution for hot dipping;
sand blasting: moving the workpiece through a sand blasting chamber for sand blasting treatment;
painting: spraying primer on the surface of the workpiece;
powder spraying: and spraying powder on the surface of the workpiece.
2. The novel anticorrosion coating process of claim 1, wherein said primer is a high temperature resistant and conductive paint.
3. The novel anticorrosive coating process according to claim 1, wherein the step 5) of spraying powder comprises the following steps: firstly, spraying powder on the workpiece for 30s, then heating the workpiece after powder spraying to 60-230 ℃ for curing treatment, maintaining for 30-60 min, and then cooling to room temperature, wherein the front surface of the film layer is more than or equal to 40 mu m.
4. The novel anticorrosive coating process according to claim 3, wherein the curing treatment is performed by an oven, the oven temperature is 160 +/-5 ℃, the curing time is 30-35 min, and after cooling, the process further comprises a polishing step of the workpiece.
5. The novel anticorrosive coating process according to claim 1, wherein the blasting efficiency in the step 3) is 10-30 m2/h。
6. The novel anticorrosive coating process according to claim 1, further comprising a drying step after the painting step, wherein the drying temperature is 60-80 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911035901.3A CN112742682A (en) | 2019-10-29 | 2019-10-29 | Novel anticorrosive coating process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911035901.3A CN112742682A (en) | 2019-10-29 | 2019-10-29 | Novel anticorrosive coating process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112742682A true CN112742682A (en) | 2021-05-04 |
Family
ID=75640677
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911035901.3A Pending CN112742682A (en) | 2019-10-29 | 2019-10-29 | Novel anticorrosive coating process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112742682A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11131259A (en) * | 1997-08-28 | 1999-05-18 | Sumitomo Seika Chem Co Ltd | Anticorrosive coating of galvanized steel |
| CN105951024A (en) * | 2016-05-12 | 2016-09-21 | 江苏固格澜栅防护设施有限公司 | Preparation method for composite coating on surface of protective guard |
| CN107262348A (en) * | 2017-06-17 | 2017-10-20 | 山西银河镀锌有限公司 | A kind of method for composite coating of galvanizing flange |
| CN108144824A (en) * | 2018-02-13 | 2018-06-12 | 佛山鸿图铁艺有限公司 | A kind of each component anticorrosive treatment process of assembled iron skill guardrail product |
| JP2018134800A (en) * | 2017-02-22 | 2018-08-30 | Ｊｆｅ建材株式会社 | Coated steel material and method for producing coated steel material |
| CN109174593A (en) * | 2018-11-27 | 2019-01-11 | 山东共达电力设备有限公司 | A kind of spraying method improving plastic-coated steel antiseptic property |
| CN109513595A (en) * | 2018-10-26 | 2019-03-26 | 宣城博迪新材料有限公司 | A kind of water-repellent preservation coating process of U-shaped pre-buried channel flow and accessory by hot galvanizing |
-
2019
- 2019-10-29 CN CN201911035901.3A patent/CN112742682A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11131259A (en) * | 1997-08-28 | 1999-05-18 | Sumitomo Seika Chem Co Ltd | Anticorrosive coating of galvanized steel |
| CN105951024A (en) * | 2016-05-12 | 2016-09-21 | 江苏固格澜栅防护设施有限公司 | Preparation method for composite coating on surface of protective guard |
| JP2018134800A (en) * | 2017-02-22 | 2018-08-30 | Ｊｆｅ建材株式会社 | Coated steel material and method for producing coated steel material |
| CN107262348A (en) * | 2017-06-17 | 2017-10-20 | 山西银河镀锌有限公司 | A kind of method for composite coating of galvanizing flange |
| CN108144824A (en) * | 2018-02-13 | 2018-06-12 | 佛山鸿图铁艺有限公司 | A kind of each component anticorrosive treatment process of assembled iron skill guardrail product |
| CN109513595A (en) * | 2018-10-26 | 2019-03-26 | 宣城博迪新材料有限公司 | A kind of water-repellent preservation coating process of U-shaped pre-buried channel flow and accessory by hot galvanizing |
| CN109174593A (en) * | 2018-11-27 | 2019-01-11 | 山东共达电力设备有限公司 | A kind of spraying method improving plastic-coated steel antiseptic property |
Non-Patent Citations (1)
| Title |
|---|
| 何明奕等著: "《机械镀原理及应用》", 30 September 2003, 机械工业出版社 * |
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Application publication date: 20210504 |