CN115584190A - Quick-curing anticorrosive wear-resistant powder coating and preparation method and application thereof - Google Patents
Quick-curing anticorrosive wear-resistant powder coating and preparation method and application thereof Download PDFInfo
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- CN115584190A CN115584190A CN202211211611.1A CN202211211611A CN115584190A CN 115584190 A CN115584190 A CN 115584190A CN 202211211611 A CN202211211611 A CN 202211211611A CN 115584190 A CN115584190 A CN 115584190A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/03—Powdery paints
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/03—Powdery paints
- C09D5/033—Powdery paints characterised by the additives
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
- C08K2003/3009—Sulfides
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/18—Applications used for pipes
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Abstract
The invention provides a quick-setting type anticorrosive wear-resistant powder coating and a preparation method and application thereof, belonging to the technical field of coatings. The quick-setting type anticorrosive wear-resistant powder coating is prepared from the following raw materials in parts by weight: 1000 parts of epoxy resin E12 powder, 200-220 parts of high-density polyethylene powder, 800-1100 parts of cast stone powder, 30-50 parts of lubricating powder, 30 parts of dicyandiamide powder and 5-10 parts of 2, 4, 6-tris (dimethylaminomethyl) phenol. The powder coating obtained by the invention is sprayed on the inner wall of the oil pumping pipe heated to 220-240 ℃, can realize the complete curing of the coating by utilizing the waste heat of the oil pipe within 3 minutes after the coating is finished, does not need the heat preservation curing at 180-200 ℃, not only improves the spraying efficiency, but also effectively saves the energy.
Description
Technical Field
The invention belongs to the technical field of coatings, and particularly relates to a quick-setting type anticorrosive wear-resistant powder coating as well as a preparation method and application thereof.
Background
In the process of oil field exploitation, the water content is increasingly increased, the mineralization degree of water quality is increased, and the corrosion and abrasion of the inner wall of an oil pipe are increasingly serious. In order to deal with the harm of corrosion and abrasion of the inner wall of the oil pumping pipe, corrosion-resistant and abrasion-resistant powder coating is adopted in some domestic oil fields, for example, the national invention patent coating ZL00126503.2 (high-strength corrosion-resistant and abrasion-resistant powder coating and a coating method thereof) is adopted, the powder coating is sprayed on the inner wall of the oil pumping pipe by a thermal spraying method, and an anticorrosion abrasion-resistant protective layer is formed after heat preservation and solidification, so that good application benefits are obtained in the practical application of the oil field.
However, after the traditional anticorrosive wear-resistant powder coating is coated at a high temperature of 220-240 ℃, the coating can reach the expected strength and the anticorrosive wear-resistant performance only after heat preservation and solidification for one hour at a temperature of 180-200 ℃, the operation is complex and the energy consumption is high, and the energy consumed in the solidification process of the coating accounts for about 40 percent of the total energy consumption in the whole coating process.
Disclosure of Invention
The invention provides a quick-setting type anticorrosive wear-resistant powder coating, and a preparation method and application thereof, which can realize ultra-quick setting of the powder coating.
The invention provides a quick-setting type anticorrosive wear-resistant powder coating which is prepared from the following raw materials in parts by weight: 1000 parts of epoxy resin E12 powder, 200-220 parts of high-density polyethylene powder, 800-1100 parts of cast stone powder, 30-50 parts of lubricating powder, 30 parts of dicyandiamide powder and 5-10 parts of 2, 4, 6-tris (dimethylaminomethyl) phenol.
Further, the lubricating powder comprises MoS 2 Or graphite powder.
The invention also provides a preparation method of the quick-setting type anticorrosive wear-resistant powder coating, which comprises the following steps:
adding 2, 4, 6-tris (dimethylaminomethyl) phenol into the cast stone powder, grinding for the first time, adding epoxy resin E12 powder, high-density polyethylene powder, lubricating powder and dicyandiamide powder, and grinding for the second time to obtain the product.
Further, the first grinding and the second grinding are performed in a blender.
Further, the rotating speed of the stirrer is 50-60 revolutions per minute.
Further, the first grinding is specifically: adding grinding porcelain balls into the stirrer, and stirring and grinding.
Further, the time of the first grinding is 10 to 30 minutes;
preferably, the first grinding time is 20 minutes.
Furthermore, the diameter of the grinding ceramic ball is 15 mm-25 mm.
Further, the time of the second grinding is 1 to 3 hours;
preferably, the second grinding time is 2 hours.
The invention also provides application of the quick-setting type anticorrosion wear-resistant powder coating or the quick-setting type anticorrosion wear-resistant powder coating prepared by any one of the preparation methods in an anticorrosion wear-resistant coating on the inner wall of an oil pumping pipe.
The invention has the following advantages:
the fast-curing anticorrosive wear-resistant powder coating for the anticorrosive wear-resistant coating on the inner wall of the oil pumping pipe comprises epoxy resin E12 powder, high-density polyethylene powder, cast stone powder, lubricating powder, dicyandiamide powder and liquid 2.4.6-tris (dimethylaminomethyl) phenol. Liquid 2, 4, 6-tri (dimethylaminomethyl) phenol is added into other powder components according to a specific proportion, and after grinding, uniform powder coating can be obtained finally.
The powder coating obtained by the invention is sprayed on the inner wall of the oil pumping pipe heated to 220-240 ℃, the powder coating can realize the complete curing of the coating by utilizing the waste heat of the oil pipe within 3 minutes after the coating is finished, and the heat preservation and curing at 180-200 ℃ are not needed, so that the spraying efficiency is improved, and the energy is effectively saved.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The embodiments and features of the embodiments of the present invention may be combined with each other without conflict.
The embodiment of the invention provides a quick-setting type anticorrosion wear-resistant powder which is prepared from the following raw materials in parts by weight: 1000 parts of epoxy resin E12 powder, 200-220 parts of high-density polyethylene powder, 800-1100 parts of cast stone powder, 30-50 parts of lubricating powder, 30 parts of dicyandiamide powder and 5-10 parts of 2, 4, 6-tris (dimethylaminomethyl) phenol.
The fast-curing anticorrosive wear-resistant powder for the anticorrosive wear-resistant coating on the inner wall of the oil pumping pipe provided by the embodiment of the invention mainly comprises epoxy resin E12 powder, high-density polyethylene powder, cast stone powder, lubricating powder, dicyandiamide powder and liquid 2.4.6-tris (dimethylaminomethyl) phenol. Wherein the epoxy resin E12 powder and the dicyandiamide mainly play a role in curing in the system, and the 2, 4, 6-tris (dimethylaminomethyl) phenol is used as an auxiliary accelerator in the system to promote the curing of the epoxy resin E12 powder and the dicyandiamide; the cast stone powder mainly improves the wear resistance of the coating; the high-density polyethylene increases the wear resistance and toughness of the coating, but excessive use of the high-density polyethylene can cause poor leveling property of the coating; the lubricating powder greatly reduces the friction coefficient of the coating to steel.
According to the embodiment of the invention, the novel liquid curing agent 2.4.6-tris (dimethylaminomethyl) phenol is added into the anticorrosive and wear-resistant powder coating for producing the inner wall of the oil pumping pipe in the oil field for the first time, and the uniform powder coating can be finally prepared by controlling the addition amount of the liquid components and the specific preparation method, so that agglomeration and the like caused by liquid addition are effectively avoided. The proper dosage of the 2.4.6-tris (dimethylaminomethyl) phenol needs to be controlled, the excessive dosage easily causes the coating to become brittle and crack, and the insufficient dosage also affects the curing speed and the coating quality, which are not favorable for the formation of the final uniform powder coating.
In one embodiment of the present invention, the lubricating powder comprises MoS 2 Or graphite powder.
The embodiment of the invention also provides a preparation method of the quick-setting type anticorrosive wear-resistant powder coating, which comprises the following steps:
adding 2, 4, 6-tris (dimethylaminomethyl) phenol into the cast stone powder, grinding for the first time, adding epoxy resin E12 powder, high-density polyethylene powder, lubricating powder and dicyandiamide powder, and grinding for the second time to obtain the product.
The preparation method of the powder coating provided by the invention comprises the steps of firstly adding 2.4.6-tris (dimethylaminomethyl) phenol into cast stone powder, controlling the dosage of the cast stone powder and the 2.4.6-tris (dimethylaminomethyl) phenol to uniformly disperse the 2.4.6-tris (dimethylaminomethyl) phenol in the cast stone powder, and then adding other powder components, so that liquid 2.4.6-tris (dimethylaminomethyl) phenol can be effectively prevented from being agglomerated in other powder components, and the uniform powder coating prepared finally is ensured.
Further, the first grinding and the second grinding are performed in a blender. Specifically, the rotation speed of the stirrer is 50-60 rpm.
Further, the first grinding is specifically: adding grinding ceramic balls into the stirrer, and stirring and grinding. Specifically, the diameter of the grinding porcelain ball is 15 mm-25 mm.
The first grinding time is 10-30 minutes; preferably, the time of the first grinding is 20 minutes.
The second grinding time is 1-3 hours; preferably, the time of the second grinding is 2 hours.
In the examples of the present invention, the first grinding time is set to about 10 to 30 minutes, mainly for uniformly dispersing the liquid 2.4.6-tris (dimethylaminomethyl) phenol in the other components. Second grinding the second grinding time is 1 to 3 hours in order to mix all the components well to obtain the final uniform powder coating.
The embodiment of the invention also provides application of the quick-setting type anticorrosion wear-resistant powder in an anticorrosion wear-resistant coating on the inner wall of the oil pumping pipe. When the oil pumping pipe is actually applied in an oil field, the inner wall of the oil pumping pipe needs to be heated to 220-240 ℃ and then is sprayed with the powder coating. The powder coating used for the inner wall of the oil pumping pipe heated to 220-240 ℃ usually needs to be cured by heat preservation at 180-200 ℃ to form an anticorrosive wear-resistant protective layer. The powder coating obtained by the invention realizes the complete curing of the coating by utilizing the waste heat of the oil pipe within 3 minutes after the coating is finished, and does not need the heat preservation curing at 180-200 ℃, thereby improving the spraying efficiency and effectively saving the energy.
The present invention will be described in detail with reference to examples.
Example 1Preparation method of quick-setting type anticorrosive wear-resistant powder coating
The composition is as follows:
the preparation method comprises the following steps:
adding 2, 4, 6-tris (dimethylaminomethyl) phenol into the cast stone powder, adding grinding ceramic balls (the diameter of the grinding ceramic balls is 15-25 mm) into a stirrer, stirring for the first grinding for 20 minutes, adding epoxy resin E12 powder, high-density polyethylene powder, lubricating powder and dicyandiamide powder, and grinding for the second time for 2 hours to obtain the product. The first grinding and the second grinding are both carried out in a stirrer, and the rotation speed of the stirrer is 50-60 revolutions per minute.
Test example 1The properties of the coating obtained in example 1 of the invention were tested
The coating obtained in the embodiment 1 is sprayed on the inner wall of the oil pumping pipe heated to 220-240 ℃ by using an air-conveying powder spraying machine, and the powder coating can realize the complete curing of the coating by using the residual heat of the oil pipe within 3min after the coating is finished. The coating is cured without heat preservation at 180-200 ℃, and about 40% of heat preservation curing electric energy is saved.
The resulting coatings were tested as follows.
(1) The chemical medium corrosion resistance test of the coating, namely 10 percent of HCl is carried out on a coating test piece under the conditions of constant temperature and constant humidity according to the requirements of national standard GB1763-79 after the corrosion resistance test is carried out for 90 days; 10% of H 2 SO 4 (ii) a 3.5% NaCl;10% of NaOH, all qualified;
(2) The coating adhesion test comprises the steps of manufacturing a coating test piece according to the requirements of the ministerial standard SY/T0442-97, carrying out adhesion test, putting the coating test piece into a water-filled high-pressure kettle, heating to 180 ℃ and 1Mpa, keeping the temperature (180 ℃) and the pressure constant (1 Mpa) for 72 hours, taking out the test piece, carrying out the coating adhesion test by using a prying method according to the SY/T0442-97 standard, and carrying out the adhesion test on the anticorrosive wear-resistant coating with the first-grade adhesion;
(3) The coating abrasion resistance test is that a coating test piece is subjected to an abrasion test on a friction abrasion testing machine at the speed of 1000g/1000 revolutions according to the requirements of the national standard GB1768-79, the abrasion loss is 0.5mg and is one fiftieth of the national standard;
(4) And (3) performing a coating impact resistance test, namely manufacturing a coating test piece according to the requirements of the ministerial mark SY/T0442-97, performing an impact resistance test, placing the coating test piece on an impact tester to measure the maximum impact value, wherein the test result is 23.4J (joule) impact strength.
Example 2Preparation method of quick-curing anticorrosive wear-resistant powder coating
The components are as follows:
the preparation method is the same as that of example 1;
after the powder coating is sprayed on the inner wall of an oil pumping pipe in a certain oil field, the coating is completely cured within 3min, the expected bonding strength and corrosion and wear resistance of the coating are achieved, and the service life of the oil pumping pipe and accessories is prolonged by about three times.
Example 3Preparation method of quick-curing anticorrosive wear-resistant powder coating
The composition is as follows:
the preparation method is the same as that of example 1;
the powder coating is sprayed on the inner wall of the oil pumping pipe to form an anti-corrosion wear-resistant coating, and the using effect of the powder coating is improved by about three times.
Comparative example 1Preparation method of quick-corrosion-resistant wear-resistant powder coating
The same as example 1 except that no curing accelerator (2.4.6-tris (dimethylaminomethyl) phenol) was added.
The coating obtained in the comparative example 1 is sprayed on the inner wall of the oil pumping pipe heated to 220-240 ℃ by using an air-conveying powder spraying machine, and the obtained coating cannot be cured, has no strength and is easy to fall off.
Comparative example 2Preparation method of anticorrosive wear-resistant powder coating
The same as in example 1, except that 1g of a curing accelerator (2.4.6-tris (dimethylaminomethyl) phenol) was added in a small amount.
The coating obtained in the comparative example 2 is sprayed on the inner wall of the oil pumping pipe heated to 220-240 ℃ by using an air-conveying powder spraying machine, the obtained coating cannot be completely cured, the required technical indexes cannot be achieved through detection, and the coating has no strength and is easy to fall off.
Comparative example 3Preparation method of anticorrosive wear-resistant powder coating
The same as example 1 except that a curing accelerator (2.4.6-tris (dimethylaminomethyl) phenol) was added in an excess amount of 20g.
The coating obtained in the comparative example 3 is sprayed on the inner wall of the oil pumping pipe heated to 220-240 ℃ by using a pneumatic powder spraying machine, and the obtained coating has the advantages of reduced hardness, insufficient adhesive force, poor flexibility, brittleness and easy cracking. The adhesive force of the coating is reduced to three levels, and the butt joint strength of the coating and steel is 23MPa; the impact strength of the coating is 11.9J (joule), which is reduced by half; in the abrasion resistance test of the coating, the abrasion loss in the abrasion test of 1000g/1000 rpm was 2mg, and the abrasion resistance was deteriorated.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The fast-curing anticorrosive wear-resistant powder coating is characterized by being prepared from the following raw materials in parts by weight: 1000 parts of epoxy resin E12 powder, 200-220 parts of high-density polyethylene powder, 800-1100 parts of cast stone powder, 30-50 parts of lubricating powder, 30 parts of dicyandiamide powder and 5-10 parts of 2, 4, 6-tris (dimethylaminomethyl) phenol.
2. The fast-curing corrosion-resistant and wear-resistant powder coating of claim 1,
the lubricating powder comprises MoS 2 Or graphite powder.
3. The preparation method of the fast-curing anticorrosion wear-resistant powder coating as claimed in claim 1 or 2, which is characterized by comprising the following steps:
adding 2, 4, 6-tris (dimethylaminomethyl) phenol into the cast stone powder, grinding for the first time, adding epoxy resin E12 powder, high-density polyethylene powder, lubricating powder and dicyandiamide powder, and grinding for the second time to obtain the product.
4. The production method according to claim 3,
the first grinding and the second grinding are carried out in a stirrer.
5. The production method according to claim 4,
the rotating speed of the stirrer is 50-60 revolutions per minute.
6. The production method according to claim 3,
the first grinding is specifically as follows: adding grinding ceramic balls into the stirrer, and stirring and grinding.
7. The production method according to claim 6,
the diameter of the grinding ceramic ball is 15 mm-25 mm.
8. The production method according to claim 3,
the first grinding time is 10-30 minutes;
preferably, the time of the first grinding is 20 minutes.
9. The production method according to claim 3,
the second grinding time is 1-3 hours;
preferably, the second grinding time is 2 hours.
10. The fast-setting anticorrosive wear-resistant powder coating of claim 1 or 2 and the fast-setting anticorrosive wear-resistant powder coating prepared by the preparation method of any one of claims 3 to 8 are applied to an anticorrosive wear-resistant coating on the inner wall of an oil well pipe.
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| CN202211211611.1A CN115584190A (en) | 2022-09-30 | 2022-09-30 | Quick-curing anticorrosive wear-resistant powder coating and preparation method and application thereof |
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Citations (6)
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| CN87100920A (en) * | 1987-02-20 | 1988-09-07 | 晋华水力磨蚀技术开发研究中心 | The coating method of anti-corrosion wear resisting powder paint and this coating |
| CN1202508A (en) * | 1997-06-12 | 1998-12-23 | 谢晓湛 | Elastic anti-corrosion wear resisting powder paint and its coating method |
| CN1283660A (en) * | 2000-08-28 | 2001-02-14 | 谢晓湛 | High-strength anticorrosion antiwear powder paint and its coating technology |
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-
2022
- 2022-09-30 CN CN202211211611.1A patent/CN115584190A/en active Pending
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|---|---|---|---|---|
| CN87100920A (en) * | 1987-02-20 | 1988-09-07 | 晋华水力磨蚀技术开发研究中心 | The coating method of anti-corrosion wear resisting powder paint and this coating |
| CN1202508A (en) * | 1997-06-12 | 1998-12-23 | 谢晓湛 | Elastic anti-corrosion wear resisting powder paint and its coating method |
| CN1283660A (en) * | 2000-08-28 | 2001-02-14 | 谢晓湛 | High-strength anticorrosion antiwear powder paint and its coating technology |
| CN102492353A (en) * | 2011-11-28 | 2012-06-13 | 江苏兰陵高分子材料有限公司 | Novel fast-set anticorrosion and wear-resistant epoxy powder coating and preparation process thereof |
| CN104069999A (en) * | 2013-03-28 | 2014-10-01 | 中国石油天然气股份有限公司 | Production method of wear-resistant anti-corrosion inner-coating oil pipe |
| CN111363474A (en) * | 2020-04-26 | 2020-07-03 | 常州市碳索新材料科技有限公司 | High-temperature-resistant powder coating for automobile EGI valve and preparation method thereof |
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