CN108912964B - High-temperature-resistant anti-drag energy-saving heavy-duty anticorrosive paint for inner wall of heat distribution pipeline - Google Patents
High-temperature-resistant anti-drag energy-saving heavy-duty anticorrosive paint for inner wall of heat distribution pipeline Download PDFInfo
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
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- C09D7/65—Additives macromolecular
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- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
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- C08K3/22—Oxides; Hydroxides of metals
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- C08K3/00—Use of inorganic substances as compounding ingredients
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Abstract
The high-temperature-resistant, anti-drag, energy-saving and heavy-duty anticorrosive coating for the inner wall of the heat distribution pipeline contains A, B two components, wherein the component A comprises the following components in percentage by weight: 20 to 30 percent of phenolic epoxy resin; 20 to 30 percent of organic silicon epoxy hybrid resin; 0.3 to 0.5 percent of polymer defoaming agent without organic silicon; 0.5 to 0.7 percent of macromolecular copolymer dispersant containing pigment affinity group; 0.35 to 0.5 percent of hydrophobic fumed silica; 0.35 to 0.8 percent of castor oil modified derivative rheological additive; 3.0 to 5.0 percent of modified zinc phosphate; 2.0 to 4.0 percent of aluminum tripolyphosphate; 10.0 to 20.0 percent of mica powder; 10.0 to 15.0 percent of talcum powder; 5.0 to 10.0 percent of titanium dioxide; 2.0 to 5.0 percent of polytetrafluoroethylene powder; 2.0 to 7.0 percent of dimethylbenzene; 1.0 to 3.0 percent of n-butyl alcohol; the weight percentage of the component B is as follows: 72.5 to 75.5 percent of modified alicyclic amine; 24.5 to 27.5 percent of amino alkoxy silane; the invention can effectively protect the heat distribution pipeline, reduce the maintenance and pipe cleaning times and play a positive role in urban central heating.
Description
Technical Field
The invention relates to the technical field of industrial coatings, in particular to a heavy anti-corrosion coating which is used for preventing corrosion, resisting high temperature, reducing drag and saving energy of the inner wall of a heat distribution pipeline for conveying high-temperature and high-pressure water in a municipal heat supply system.
Background
With the rapid development of national economy of China, the proportion of urbanization in China is increased year by year, so that the central heating of cities, particularly northern cities, in winter is on an increasing trend in scale and popularization rate. Urban central heating, the heat energy "steam" that heating enterprises produced is carried each concrete user through the heating power pipeline of urban heating pipe network, therefore, the heating power pipeline plays important effect in urban central heating: the quality and the efficiency of the heat distribution pipeline directly affect the quality of the whole urban central heating system. Because the heat energy steam transmitted by the heat supply pipeline has higher temperature, and the higher temperature can accelerate the corrosion inside the heat supply pipeline, once the heat supply pipeline is corroded, the normal operation of some areas of the urban heat supply pipeline network can be influenced, if the corroded area of the heat supply pipeline is larger, the normal operation of the whole urban heat supply pipeline network can be even influenced, and in severe cases, the life and property safety can be even endangered, so that the adverse social influence and the major economic loss are caused; frequent repair and maintenance are inconvenient due to cold weather, long in period and high in cost. Therefore, there is a great deal of interest in the industry regarding the corrosion protection of the exterior and interior walls of the thermal conduits. The invention mainly relates to the corrosion prevention of the inner wall of the heat distribution pipeline.
At present, the main methods for corrosion prevention of the inner wall of the heat distribution pipeline comprise: (1) performing corrosion prevention by adding sulfite to eliminate dissolved oxygen in the heat energy circulating water; (2) adding a corrosion inhibitor into the heat energy circulating water to inhibit the corrosion of the inner wall of the pipeline; (3) arranging water treatment equipment to improve the water quality of the heat energy circulating water; (4) and (4) improving the pH value of the heat energy circulating water and the like. However, the existing corrosion prevention methods not only cause environmental pollution when the heat energy circulating water is discharged, but also increase the operation cost of heating enterprises or increase the use cost of heating for residents.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a high-temperature-resistant, anti-drag and energy-saving heavy anti-corrosion coating for the inner wall of a heat distribution pipeline, and the heavy anti-corrosion coating is coated on the inner wall of the heat distribution pipeline, so that the inner wall of the pipeline can be protected from being corroded by a hot water medium, the surface of the inner wall of the pipeline can be improved in finish degree and has a hydrophobic function similar to a lotus effect, resistance can be reduced, the friction between hot water and the inner wall of the pipeline can be reduced, the flow of heat energy circulating water can be improved; in addition, the times and areas for maintenance and pipe cleaning can be reduced, the influence of discharged water on the environment is reduced, and the urban heat supply pipe network is more effective and has lower use cost.
In order to achieve the purpose, the invention adopts the following technical scheme.
A high-temperature-resistant, anti-drag, energy-saving and heavy-duty anticorrosive coating for the inner wall of a heat distribution pipeline comprises A, B components, and is characterized in that the component A comprises the following components in percentage by weight:
the weight percentage of the component B is as follows:
modified alicyclic amine: 72.5% -75.5%;
aminoalkoxysilanes: 24.5% -27.5%;
during construction, the component A and the component B are mixed according to the weight ratio of 100: 18-27.5.
Further, the epoxy equivalent of the novolac epoxy resin is 168-178 (g/eq).
Further, the epoxy equivalent of the silicone epoxy hybrid resin is about 450 (g/eq).
Further, the modified alicyclic amine has an active hydrogen equivalent of 115.
Further, the aminoalkoxysilanes are reactive difunctional silanes, primary amino groups and hydrolyzable ethoxysilyl groups, the dual nature of their reactivity makes them useful both as crosslinkers and as adhesion promoters for coatings.
The high-temperature-resistant anti-drag energy-saving heavy-duty anticorrosive coating for the inner wall of the heat distribution pipeline has the advantages that:
(1) provides a high-temperature-resistant heavy-duty coating for the inner wall of the heat distribution pipeline, so that a new technical scheme is provided for protecting the heat distribution pipeline.
(2) The inner wall of the heat distribution pipeline can be protected from being corroded by a hot water medium, the surface of the inner wall of the pipeline can be improved in finish degree, the hydrophobic function similar to a lotus leaf effect is achieved, drag reduction is achieved, friction between hot water and the inner wall of the pipeline is reduced, the flow of heat energy circulating water is improved, and power consumption during operation is reduced.
(3) The number of times of heat distribution pipeline maintenance and pipe cleaning can be reduced, the influence of the discharged water of the urban heat supply pipe network on the environment is reduced, and the urban heat supply pipe network is more effective and has lower use cost.
Detailed Description
The following provides a specific implementation mode of the high-temperature-resistant, anti-drag, energy-saving and heavy-duty anticorrosive coating for the inner wall of the thermal pipeline, and 3 examples are provided. However, it should be noted that the present invention is not limited to the following embodiments.
Example 1
The high-temperature-resistant, anti-drag and energy-saving heavy-duty anticorrosive coating for the inner wall of the heat distribution pipeline comprises A, B two components, wherein the component A comprises the following components in percentage by weight:
20 percent of phenolic epoxy resin, south Asia epoxy resin NPPN-631 is adopted, and the epoxy equivalent is 168-178 (g/eq).
30% of silicone epoxy hybrid resin, and SILIKOPEN EF resin which is a resin obtained by winning special chemistry (Shanghai) limited company and has an epoxy equivalent of about 450(g/eq) is adopted.
0.3% of silicone-free polymer defoamer, BYK-057 from Pico Chemicals was used.
0.7% of a pigment affinity group-containing polymer copolymer dispersant, and AFCONA4570 (product of Aikona chemical Co., Ltd.) was used.
0.35% of hydrophobic fumed silica, and R972 product of Special chemical company Limited of Wingchuang.
0.35% of the castor oil modified derivative rheological aid, THIXATROL ST product from hamming sted chemical company.
5.0 percent of modified zinc phosphate can be purchased from professional markets.
2.0 percent of aluminum tripolyphosphate, and raw materials can be purchased from professional markets.
10.0 percent of mica powder, and can be purchased from professional markets.
10.0 percent of talcum powder, which can be purchased from professional markets.
6.3 percent of titanium dioxide, and can be purchased from professional markets.
5.0% of polytetrafluoroethylene powder, MP1000 product from DuPont company.
7.0% xylene, a raw material available from the professional market.
3.0 percent of n-butyl alcohol, and raw materials can be purchased from professional markets.
The weight percentage of the component B is as follows:
72.5 percent of modified alicyclic amine, and an Ancamine2143 curing agent of air chemical company, wherein the equivalent of active hydrogen of the modified alicyclic amine is 115.
Aminoalkoxysilane 27.5%, a reactive bifunctional silane-primary amino and hydrolyzable ethoxysilyl-using the Dynasylan AMEO product, pioneering specialty Chemicals (Shanghai) Inc.; the reactive dual property can be used as a cross-linking agent and an adhesion promoter of the coating.
(II) the preparation method of the high-temperature-resistant, anti-drag and energy-saving heavy-duty anticorrosive coating for the inner wall of the heat distribution pipeline comprises the following steps:
(1) preparation of component A
Placing phenolic epoxy resin and organic silicon epoxy hybrid resin in an industrial container according to the weight percentage of the components, sequentially adding a defoaming agent and a dispersing agent under the condition of continuous stirring, adding hydrophobic fumed silica after stirring and dispersing for 10 minutes, increasing the rotating speed of a dispersing machine, sequentially adding modified zinc phosphate, aluminum tripolyphosphate, mica powder, talcum powder and titanium dioxide under the condition of medium-speed stirring, increasing the rotating speed of the dispersing machine, continuing stirring, reducing the rotating speed when the temperature of the mixture reaches 40 ℃, adding a castor oil modified derivative rheological additive, increasing the rotating speed of the dispersing machine after the addition is finished, and keeping the temperature for 40 minutes when the temperature of the mixture reaches 45-50 ℃.
Secondly, after the mixture is kept stand and cooled to room temperature, the mixture is ground by a horizontal sand mill until the fineness is less than or equal to 60 mu m.
And thirdly, sequentially adding polytetrafluoroethylene powder, xylene and n-butyl alcohol into the ground mixture, and uniformly dispersing at a high speed to obtain the component A coating.
Fourthly, subpackaging and storing according to the packaging requirements of the products.
(2) Preparation of component B
Placing the modified alicyclic amine and amino alkoxy silane in a clean and anhydrous pull cylinder without residual alcohol solvent, dispersing for 15 minutes at medium speed, and dispersing uniformly to obtain the component B coating.
Secondly, subpackaging and storing according to the packaging requirements of the products.
(III) application method of high-temperature-resistant, anti-drag, energy-saving and heavy-duty anticorrosive paint for inner wall of heat distribution pipeline in embodiment 1
(1) Before the heavy anti-corrosion coating is used for coating the inner wall of the heat distribution pipeline, the surface of a base material needs to be subjected to oil removal, rust removal, thermal cleaning and sand blasting cleaning, so that the inner wall of the heat distribution pipeline is free of oxide skin, oil stain, water, cracks, burrs and spiral scratches.
(2) Before construction, the component A and the component B of the heavy anti-corrosion coating are mixed according to the weight ratio of A to B being 100 to 23.5.
(3) During coating, single-pass spraying or multi-pass spraying can be carried out, the coating thickness of a wet coating can reach 650 mu m, and the sagging phenomenon cannot be caused.
(4) If multiple coats are applied, the minimum coat interval is 4 hours and the maximum coat interval is 14 days at 25 deg.C.
(5) The coating was fully cured after 7 days.
Example 2
The high-temperature-resistant, anti-drag and energy-saving heavy-duty anticorrosive coating for the inner wall of the heat distribution pipeline comprises A, B two components, wherein the component A comprises the following components in percentage by weight:
novolac epoxy resin 21%, (the product used is the same as example 1).
21% of silicone epoxy hybrid resin (the product is the same as example 1).
0.4% of silicone-free polymeric defoamer (same product as in example 1).
0.6% of a pigment affinity group-containing polymer copolymer dispersant (same product as used in example 1).
0.42% of hydrophobic fumed silica (same product as used in example 1).
0.5% of castor oil modified derivative rheological aid (the same product as in example 1 is used).
4.0% of modified zinc phosphate (the same product as in example 1).
2.08% of aluminum tripolyphosphate (the product is the same as in example 1).
20.0% of mica powder (the same product as in example 1 is used).
Talc 11.0% (same product as in example 1).
10.0 percent of titanium dioxide (the adopted product is the same as the example 1).
3.0% of polytetrafluoroethylene powder (same product as in example 1).
4.0% of xylene (same product as used in example 1).
2.0% of n-butanol (the same product as in example 1) was used.
The weight percentage of the component B is as follows:
74.5% of modified alicyclic amine (the same product as in example 1) was used.
Aminoalkoxysilane 25.5%, (same product as in example 1) was used.
And (II) a preparation method of the high-temperature-resistant, anti-drag and energy-saving heavy-duty anticorrosive coating for the inner wall of the heat distribution pipeline (same as the embodiment 1).
(III) the application method of the high-temperature resistant, drag-reducing, energy-saving and heavy-duty anticorrosive coating for the inner wall of the heat distribution pipeline in the embodiment 2 (basically the same as the embodiment 1) is different from the following steps: before construction, the component A and the component B of the heavy anti-corrosion coating are mixed according to the weight ratio of A to B being 100 to 18.
Example 3
The high-temperature-resistant, anti-drag and energy-saving heavy-duty anticorrosive coating for the inner wall of the heat distribution pipeline comprises A, B two components, wherein the component A comprises the following components in percentage by weight:
30% of novolac epoxy resin (the product is the same as that in example 1).
20% of silicone epoxy hybrid resin (the product is the same as example 1).
0.5% of silicone-free polymeric defoamer (same product as in example 1).
0.5% of a pigment affinity group-containing polymer copolymer dispersant (the same product as used in example 1) was used.
0.5% hydrophobic fumed silica (same product as in example 1).
0.8% of castor oil modified derivative rheological aid (the same product as in example 1 is used).
3.0% of modified zinc phosphate (the same product as in example 1).
4.08% of aluminum tripolyphosphate (the product is the same as that in example 1).
15.7% of mica powder (the same product as in example 1 is used).
Talc 15.0% (same product as in example 1).
5.0 percent of titanium dioxide (the adopted product is the same as the example 1).
2.0% of polytetrafluoroethylene powder (same product as in example 1).
2.0% of xylene (same product as used in example 1).
1.0% of n-butanol (the same product as in example 1 was used).
The weight percentage of the component B is as follows:
75.5% of modified alicyclic amine (the same product as in example 1) was used.
24.5% of aminoalkoxysilane (same product as used in example 1).
And (II) a preparation method of the high-temperature-resistant, anti-drag and energy-saving heavy-duty anticorrosive coating for the inner wall of the heat distribution pipeline (same as the embodiment 1).
(III) the application method of the high-temperature resistant, drag-reducing, energy-saving and heavy-duty anticorrosive coating for the inner wall of the heat distribution pipeline in the embodiment 3 (basically the same as the embodiment 1) is different: before construction, the component A and the component B of the heavy anti-corrosion coating are mixed according to the weight ratio of (A: B) 100: 27.5.
The high-temperature-resistant, anti-drag, energy-saving and heavy-duty anticorrosive paint for the inner wall of the heat distribution pipeline in the embodiments 1 to 3 of the invention is tested by a conventional method, and the test result shows that:
(1) the coating has small surface tension, a contact angle theta between the coating and water is more than 90 degrees, the coating is easy to clean, and the stain resistance is good.
(2) In a high-temperature autoclave taking deionized water as a medium, a coating film of the coating can withstand the harsh conditions of 150 ℃ and 10MPa of pressure within 168 hours without foaming, cracking and falling off.
(3) The coating does not generate the phenomena of bubbling, cracking and falling after being placed in boiled water at the temperature of 95 ℃ for 1000 hours.
(4) The coating does not generate the phenomena of foaming, cracking and shedding after being placed in an oil bath at the temperature of 150 ℃ for 1000 hours.
(5) The coating is respectively soaked in 10 percent sulfuric acid, 5 percent sodium hydroxide and 3 percent sodium chloride solution at room temperature (25 ℃) for 30 days, and the phenomenon of foaming, cracking and falling off does not occur in the paint film.
(6) The coating is respectively soaked in oil products such as crude oil, gasoline, diesel oil and the like at normal temperature (25 ℃) for 30 days without the phenomena of foaming, cracking and falling off.
The test result proves that:
(1) the high-temperature-resistant, anti-drag, energy-saving and heavy-duty anticorrosive coating for the inner wall of the heat distribution pipeline can protect the inner wall of the heat distribution pipeline from being corroded by hot water medium, can improve the smoothness of the surface of the inner wall of the pipeline, has a good hydrophobic function, can reduce drag and reduce the friction between hot water and the inner wall of the pipeline, improves the flow of heat energy circulating water, and reduces the power consumption during operation.
(2) The number of times of heat distribution pipeline maintenance and pipe cleaning can be reduced, the influence of the discharged water of the urban heat supply pipe network on the environment is reduced, and the urban heat supply pipe network is more effective and has lower use cost.
(3) The coating is a new better coating variety, can effectively protect a heat distribution pipeline, and has a positive effect on urban central heating.
Claims (4)
1. A high-temperature-resistant, anti-drag, energy-saving and heavy-duty anticorrosive coating for the inner wall of a heat distribution pipeline comprises A, B components, and is characterized in that the component A comprises the following components in percentage by weight:
20 to 30 percent of phenolic epoxy resin;
20 to 30 percent of organic silicon epoxy hybrid resin;
0.3 to 0.5 percent of polymer defoaming agent without organic silicon;
0.5 to 0.7 percent of macromolecular copolymer dispersant containing pigment affinity group;
0.35 to 0.5 percent of hydrophobic fumed silica;
0.35 to 0.8 percent of castor oil modified derivative rheological additive;
3.0 to 5.0 percent of modified zinc phosphate;
2.0 to 4.0 percent of aluminum tripolyphosphate;
10.0 to 20.0 percent of mica powder;
10.0 to 15.0 percent of talcum powder;
5.0 to 10.0 percent of titanium dioxide;
2.0 to 5.0 percent of polytetrafluoroethylene powder;
2.0 to 7.0 percent of dimethylbenzene;
1.0 to 3.0 percent of n-butyl alcohol;
the weight percentage of the component B is as follows:
modified alicyclic amine: 72.5% -75.5%;
aminoalkoxysilanes: 24.5% -27.5%;
the component A and the component B are mixed according to the weight ratio of (A: B) being 100: 18-27.5 during construction; wherein the content of the first and second substances,
the amino alkoxy silane can be used as a cross-linking agent and also as an adhesion promoter of a coating.
2. The high-temperature-resistant, drag-reducing, energy-saving and heavy-duty anticorrosive coating for the inner wall of the heat distribution pipeline as claimed in claim 1, wherein the epoxy equivalent of the novolac epoxy resin is 168-178 g/eq.
3. The high-temperature-resistant, drag-reducing, energy-saving and heavy-duty anticorrosive coating for the inner wall of the heat distribution pipeline as claimed in claim 1, wherein the epoxy equivalent of the organosilicon epoxy hybrid resin is 450 g/eq.
4. The high-temperature-resistant, drag-reducing, energy-saving and heavy-duty anticorrosive coating for the inner wall of the heat distribution pipeline as claimed in claim 1, wherein the active hydrogen equivalent of the modified alicyclic amine is 115.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810823794.XA CN108912964B (en) | 2018-07-25 | 2018-07-25 | High-temperature-resistant anti-drag energy-saving heavy-duty anticorrosive paint for inner wall of heat distribution pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810823794.XA CN108912964B (en) | 2018-07-25 | 2018-07-25 | High-temperature-resistant anti-drag energy-saving heavy-duty anticorrosive paint for inner wall of heat distribution pipeline |
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| CN111187554A (en) * | 2020-03-05 | 2020-05-22 | 中国石油天然气集团有限公司 | Anticorrosive paint for large-diameter high-temperature-resistant thermal steel pipe and spraying method |
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| CN103614074B (en) * | 2013-11-22 | 2015-10-21 | 上海海隆石油化工研究所 | A kind of heatproof high voltage resistant corrosion dual-component coating |
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Address after: 200949 No. 1825 Luo Dong Road, Baoshan District, Shanghai. Patentee after: SHANGHAI HAILONG SHINE NEW MATERIALS Co.,Ltd. Patentee after: Zhengzhou Thermal Power Group Co.,Ltd. Address before: 200949 No. 1825 Luo Dong Road, Baoshan District, Shanghai. Patentee before: SHANGHAI HAILONG SHINE NEW MATERIALS Co.,Ltd. Patentee before: ZHENGZHOU THERMAL POWER Corp. |