CN113999580A - High-temperature-resistant stainless steel seamless steel pipe and machining method thereof - Google Patents
High-temperature-resistant stainless steel seamless steel pipe and machining method thereof Download PDFInfo
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- 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
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
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- 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
- B05D7/146—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 to metallic pipes or tubes
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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
- C09D5/08—Anti-corrosive paints
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- 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
- C09D5/18—Fireproof paints including high temperature resistant paints
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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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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2296—Oxides; Hydroxides of metals of zinc
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- C08L2203/00—Applications
- C08L2203/18—Applications used for pipes
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Abstract
The application relates to a high-temperature-resistant stainless steel seamless steel pipe and a processing method thereof, wherein the high-temperature-resistant stainless steel seamless steel pipe comprises a steel pipe main body coated with a surface treatment agent, and the surface treatment agent comprises the following components: acrylic resin, polyimide, polyvinyl alcohol emulsion, melamine, polybenzimidazole, filler and xylene; a method for processing a high-temperature-resistant stainless steel seamless steel pipe comprises the steps of preparing a surface treating agent and coating the surface treating agent. In the application, acrylic resin with excellent coating performance and good heat resistance and polyimide with high thermal stability are mixed; the benzo five-membered heterocyclic rigid chain polymer polybenzimidazole can assist in improving the high-temperature resistance of the surface treating agent; the polyvinyl alcohol emulsion forms a plurality of milky hollow spheres, and a plurality of vacuum cavities are combined into a vacuum wall to effectively prevent heat conduction; the filler enables the coating to form a three-dimensional network structure with heat insulation performance, and enables the surface treatment agent to resist high temperature, so as to improve the high temperature resistance of the steel pipe.
Description
Technical Field
The application relates to the technical field of steel pipe machining, in particular to a high-temperature-resistant stainless steel seamless steel pipe and a machining method thereof.
Background
The seamless stainless steel pipe is called seamless pipe for short, the surface of the seamless stainless steel pipe is rough, the length of the seamless stainless steel pipe is not fixed, and the seamless stainless steel pipe is used for boilers, central air conditioners, steel structures, machining, pipeline fuel gas, fire fighting and the like. With the continuous progress of the power production technology, the living standard of people is continuously improved, and the quality requirement on the steel pipe is higher and higher.
The key parts of many large-scale plants and devices adopt a large amount of seamless pipes as pipelines, and the pipelines need to be continuously used for a long time and have severe working environment, so the requirement on the high-temperature resistance of the pipelines is higher, and the existing seamless pipes still need to be improved.
Disclosure of Invention
In order to improve the high temperature resistance of seamless pipe, this application provides a high temperature resistant stainless steel seamless steel pipe.
In a first aspect, the application provides a high temperature resistant stainless steel seamless steel pipe adopts following technical scheme:
the high-temperature-resistant stainless steel seamless steel tube comprises a steel tube main body, wherein a surface treatment agent is coated on the surface of the steel tube main body, and the surface treatment agent comprises the following components in parts by weight:
40-50 parts of acrylic resin;
8-10 parts of polyimide;
4-5 parts of polyvinyl alcohol emulsion;
2-3 parts of melamine;
0.4-0.6 parts of polybenzimidazole;
1-2 parts of a filler;
9-10 parts of dimethylbenzene.
By adopting the technical scheme, the surface treating agent takes the acrylic resin as a main component, the coating film has excellent performance, good light resistance and weather resistance, excellent heat resistance, chemical resistance, corrosion resistance and other performances, the polyimide has excellent mechanical performance and high thermal stability, and the acrylic resin and the polyimide are mixed to effectively improve the high-temperature resistance of the surface treating agent; polybenzimidazole is a benzo five-membered heterocyclic rigid chain polymer containing two nitrogen atoms, can assist in improving the high temperature resistance of the surface treating agent, and simultaneously improves the adhesive force of the surface treating agent on the surface of a steel pipe by utilizing the stronger bonding property of the polybenzimidazole to stainless steel; the polyvinyl alcohol emulsion forms a plurality of milky hollow spheres to form a vacuum wall like a plurality of vacuum cavities, thereby forming a compact filling structure, effectively preventing heat conduction and improving the temperature resistance of the surface treating agent; the melamine has the advantages of durability and high hardness, and the durability and the mechanical property of the surface treating agent are effectively improved by further mixing the melamine with acrylic resin; the existence of the filler fiber enables the coating to form a three-dimensional network structure, and can effectively ensure that the coating has excellent heat-insulating property, thereby achieving the purpose of improving the high-temperature resistance of the steel pipe.
Preferably, the preparation method of the polyvinyl alcohol emulsion comprises the following steps: dispersing 6-8 parts of polyvinyl alcohol, 12-15 parts of polyetheramine and 2-3 parts of diisobutyl naphthalene sulfonate by ultrasonic waves with the ultrasonic power of 100-150W and the frequency of 20-30kHz for 20-30min to obtain the polyvinyl alcohol emulsion.
By adopting the technical scheme, polyvinyl alcohol with film forming property and a polyether amine dispersing agent are mixed to form uniform liquid drops, and then diisobutyl naphthalene sulfonate is added to cover the surface of the liquid drops, so that the stronger the electrostatic or three-dimensional stabilizing effect of the liquid drops is, the higher the stability is, and therefore, the hollow microspheres formed by the polyvinyl alcohol, the polyether amine and the diisobutyl naphthalene sulfonate under ultrasonic treatment can ensure that the surface treating agent has higher heat insulation and high temperature resistance.
Preferably, the surface treating agent also comprises 1-2 parts of trifluoroethyl methacrylate and 0.3-0.4 part of a cross-linking agent in parts by weight.
By adopting the technical scheme, the trifluoroethyl methacrylate contains C-F bonds, has high bond energy, has a space shielding effect formed by fluorine atoms outside a carbon chain, has good chemical stability and high temperature resistance, and is added with trifluoroethyl methacrylate and a polyvinyl alcohol emulsion to further generate a crosslinking reaction to prepare a crosslinked polymer system, so that excellent high temperature resistance is obtained.
Preferably, the surface treating agent further comprises 0.8-1.2 parts of benzyl silicone resin by weight.
By adopting the technical scheme, the benzyl silicone resin is the organic silicon resin with excellent high-temperature resistance, the benzyl silicone resin is added to generate a synergistic effect with the melamine, the benzyl silicone resin can be dissolved to a certain extent at a high temperature, and the silicon dioxide formed after decomposition can be adhered to the melamine at a high temperature and further combined with each component, so that the coating of the surface treating agent is more compact, and the high-temperature resistance of the surface treating agent coated on the steel pipe is improved.
Preferably, the surface treating agent further comprises 0.3-0.4 part of styrene in parts by weight.
By adopting the technical scheme, the styrene is gradually dripped, the performance of a resin product obtained by the reaction of the benzyl silicone resin and the melamine is improved, and the compatibility with each component is improved, so that the effect of improving the coating compactness of the surface treating agent is further achieved.
Preferably, the crosslinking agent is dicumyl peroxide.
Preferably, the filler is nano zinc oxide.
In a second aspect, the application provides a method for processing a high-temperature-resistant stainless steel seamless steel tube, which adopts the following technical scheme:
a processing method of a high-temperature resistant stainless steel seamless steel pipe comprises the following steps:
s1, preparing a surface treating agent; firstly, mixing acrylic resin and polyimide, heating to 70-80 ℃, and stirring for 40-50 min; adding the polyvinyl alcohol emulsion, continuing to stir for 30-35min, adding the melamine, stirring for 40-45min, finally adding the polybenzimidazole, the filler and the xylene, and stirring and mixing to prepare the surface treating agent;
s2, coating a surface treatment agent; after the steel pipe main body is subjected to shot blasting rust removal and high-pressure gas ash removal, heating the steel pipe main body to 120-130 ℃, spraying the surface treating agent prepared in the step S1 on the steel pipe main body by using an airless sprayer, and then preserving heat at the temperature of 120-130 ℃ for 12-15min to solidify the coating to form a high-temperature resistant layer; and cooling by using circulating water to prepare the high-temperature-resistant stainless steel seamless steel tube.
Preferably, the method further comprises the following steps: in the S1, 4-5 parts of polyvinyl alcohol emulsion, 1-2 parts of trifluoroethyl methacrylate and 0.3-0.4 part of cross-linking agent are blended and stirred for 50-60min at 70-80 ℃ to obtain a cross-linked product;
mixing 2-3 parts of melamine and 0.8-1.2 parts of benzyl silicone resin, heating to 80-90 ℃, dropwise adding 0.3-0.4 part of styrene while stirring until the dropwise addition is completed, continuously preserving heat and stirring for 40-50min to obtain modified organic silicon resin;
mixing 40-50 parts of acrylic resin and 8-10 parts of polyimide, heating to 70-80 ℃, and stirring for 40-50 min; and adding the crosslinking product, continuing stirring for 50-60min, adding the modified organic silicon resin, stirring for 1-1.5h, finally adding 0.4-0.6 part of polybenzimidazole, 1-2 parts of filler and 9-10 parts of xylene, and stirring and mixing to obtain the surface treating agent.
To sum up, the application comprises the following beneficial technical effects:
1. the acrylic resin is used as a main component, the coating performance is excellent, the heat resistance is good, the polyimide has excellent mechanical performance, and the thermal stability is high; the polybenzimidazole is a benzo five-membered heterocyclic rigid chain polymer containing two nitrogen atoms, and can assist in improving the high-temperature resistance of the surface treating agent; the polyvinyl alcohol emulsion forms a plurality of milky hollow spheres to form a vacuum wall like a plurality of vacuum cavities, thereby forming a compact filling structure and effectively preventing heat conduction; due to the existence of the filler, the coating forms a three-dimensional network structure, so that the excellent heat-insulating property of the coating can be effectively ensured, and the temperature resistance of the surface treating agent is improved;
2. polyvinyl alcohol with film-forming property and polyether amine dispersant are mixed to form uniform liquid drops, then diisobutyl naphthalene sulfonate is added to cover the surface of the liquid drops, so that the stronger the electrostatic or stereo-stabilization effect of the liquid drops is, the higher the stability is, and therefore, the hollow microspheres formed by the polyvinyl alcohol, the polyether amine and the diisobutyl naphthalene sulfonate under ultrasonic treatment can ensure that the surface treating agent obtains higher heat insulation and high temperature resistance;
3. the trifluoroethyl methacrylate contains C-F bonds, has high bond energy, has a space shielding effect formed by fluorine atoms outside a carbon chain, has good chemical stability and high temperature resistance, and is added with trifluoroethyl methacrylate and a polyvinyl alcohol emulsion to further generate a crosslinking reaction to prepare a crosslinked polymer system so as to obtain excellent high temperature resistance;
4. the benzyl silicone resin is organic silicon resin with excellent high-temperature resistance, and silicon dioxide formed after the benzyl silicone resin is decomposed at high temperature can be bonded with melamine and further combined with each component, so that the coating of the surface treating agent is more compact; the styrene is added in a dropwise manner, so that the performance of a resin product obtained by the reaction of the benzyl silicone resin and the melamine is improved, and the compatibility with each component is improved, thereby further achieving the effect of improving the coating compactness of the surface treating agent and achieving the purpose of improving the high temperature resistance of the steel pipe coated with the surface treating agent.
Detailed Description
The present application is described in further detail below.
In the present application, the acrylic resin is produced by the chemical industry limited of denhaoyang; polyimide is produced by new material science and technology limited of Deyi Changzhou; polyvinyl alcohol is produced by Jinniu chemical Co., Ltd in Jinan, and is in the form of 1788 powder; the polyether amine is produced by Shandong Liang New Material Co; sodium diisobutylnaphthalenesulfonate is produced by Zhengzhou Chengniao chemical products Co., Ltd, cat # 305-7080; the nano zinc oxide is produced by Shandong Kepler Biotechnology Limited, model kpl-4525823; the benzyl silicone resin is produced by Chengdu chemical Co., Ltd.
The raw materials used in the following embodiments may be those conventionally commercially available unless otherwise specified; the application uses an airless sprayer model TZR188, power 1500W.
Examples
Example 1
The embodiment discloses a high-temperature resistant stainless steel seamless steel pipe and a processing method thereof; the high-temperature-resistant stainless steel seamless steel pipe comprises a steel pipe main body, wherein a surface treatment agent is coated on the surface of the steel pipe main body, and comprises the following components: acrylic resin, polyimide, polyvinyl alcohol emulsion, melamine, polybenzimidazole, a filler and xylene, wherein the filler is nano zinc oxide.
The preparation method of the polyvinyl alcohol emulsion comprises the following steps: dispersing 6 parts of polyvinyl alcohol, 12 parts of polyetheramine and 2 parts of sodium diisobutylnaphthalenesulfonate for 20min by ultrasonic waves with the ultrasonic power of 100W and the frequency of 20kHz to obtain the polyvinyl alcohol emulsion.
A processing method of a high-temperature resistant stainless steel seamless steel pipe comprises the following steps:
s1, preparing a surface treating agent; firstly, mixing acrylic resin and polyimide, heating to 70 ℃, and stirring for 40 min; and adding the polyvinyl alcohol emulsion, continuing stirring for 30min, adding the melamine, stirring for 40min, finally adding the polybenzimidazole, the filler and the xylene, and stirring and mixing to obtain the surface treating agent.
S2, coating and processing a surface treating agent; after the steel pipe main body is subjected to shot blasting rust removal and high-pressure gas ash removal, heating the steel pipe main body to 120 ℃, spraying the surface treating agent prepared in the step S1 on the steel pipe main body by using an airless sprayer, and then preserving heat at the temperature of 120 ℃ for 12min to solidify a coating to form a high-temperature resistant layer; and cooling by using circulating water to prepare the high-temperature-resistant stainless steel seamless steel tube.
The contents of the components are shown in table 1 below.
Example 2
The embodiment discloses a high-temperature resistant stainless steel seamless steel pipe and a processing method thereof; the high-temperature-resistant stainless steel seamless steel pipe comprises a steel pipe main body, wherein a surface treatment agent is coated on the surface of the steel pipe main body, and comprises the following components: acrylic resin, polyimide, polyvinyl alcohol emulsion, melamine, polybenzimidazole, a filler and xylene, wherein the filler is nano zinc oxide.
The preparation method of the polyvinyl alcohol emulsion comprises the following steps: dispersing 8 parts of polyvinyl alcohol, 15 parts of polyetheramine and 3 parts of sodium diisobutylnaphthalenesulfonate for 30min by ultrasonic waves with the ultrasonic power of 150W and the frequency of 30kHz to obtain the polyvinyl alcohol emulsion.
A processing method of a high-temperature resistant stainless steel seamless steel pipe comprises the following steps:
s1, preparing a surface treating agent; firstly, mixing acrylic resin and polyimide, heating to 80 ℃, and stirring for 50 min; and adding the polyvinyl alcohol emulsion, continuing stirring for 35min, adding melamine, stirring for 45min, finally adding the polybenzimidazole, the filler and the xylene, and stirring and mixing to obtain the surface treating agent.
S2, coating and processing a surface treating agent; after the steel pipe main body is subjected to shot blasting rust removal and high-pressure gas ash removal, heating the steel pipe main body to 130 ℃, spraying the surface treating agent prepared in the step S1 on the steel pipe main body by using an airless sprayer, and then preserving heat at the temperature of 130 ℃ for 15min to solidify a coating to form a high-temperature resistant layer; and cooling by using circulating water to prepare the high-temperature-resistant stainless steel seamless steel tube.
The contents of the components are shown in table 1 below.
Example 3
The embodiment discloses a high-temperature resistant stainless steel seamless steel pipe and a processing method thereof; the high-temperature-resistant stainless steel seamless steel pipe comprises a steel pipe main body, wherein a surface treatment agent is coated on the surface of the steel pipe main body, and comprises the following components: acrylic resin, polyimide, polyvinyl alcohol emulsion, melamine, polybenzimidazole, a filler and xylene, wherein the filler is nano zinc oxide.
The preparation method of the polyvinyl alcohol emulsion comprises the following steps: dispersing 7 parts of polyvinyl alcohol, 14 parts of polyetheramine and 3 parts of sodium diisobutylnaphthalenesulfonate for 25min by ultrasonic waves with the ultrasonic power of 130W and the frequency of 25kHz to obtain the polyvinyl alcohol emulsion.
A processing method of a high-temperature resistant stainless steel seamless steel pipe comprises the following steps:
s1, preparing a surface treating agent; firstly, mixing acrylic resin and polyimide, heating to 75 ℃, and stirring for 45 min; adding the polyvinyl alcohol emulsion, continuing stirring for 33min, adding melamine, stirring for 43min, finally adding the polybenzimidazole, the filler and the xylene, and stirring and mixing to obtain a surface treating agent;
s2, coating and processing a surface treating agent; after the steel pipe main body is subjected to shot blasting rust removal and high-pressure gas ash removal, heating the steel pipe main body to 125 ℃, spraying the surface treating agent prepared in the step S1 on the steel pipe main body by using an airless sprayer, and then preserving heat at 125 ℃ for 14min to solidify a coating to form a high-temperature resistant layer; and cooling by using circulating water to prepare the high-temperature-resistant stainless steel seamless steel tube.
The contents of the components are shown in table 1 below.
Example 4
The difference from the embodiment 1 is that the high-temperature resistant stainless steel seamless steel pipe comprises a steel pipe main body, wherein the surface of the steel pipe main body is coated with a surface treatment agent, and the surface treatment agent comprises the following components: acrylic resin, polyimide, polyvinyl alcohol emulsion, melamine, polybenzimidazole, filler, xylene, trifluoroethyl methacrylate, a crosslinking agent, phenylmethylsilicone resin and styrene; wherein, the filler is nano zinc oxide, and the cross-linking agent is dicumyl peroxide.
A processing method of a high-temperature resistant stainless steel seamless steel pipe comprises the following steps:
blending the polyvinyl alcohol emulsion, trifluoroethyl methacrylate and a crosslinking agent, and stirring for 50min at 70 ℃ to obtain a crosslinked product;
mixing melamine and benzyl silicone resin, heating to 80 ℃, dropwise adding styrene while stirring, continuing to preserve heat and stirring for 40min after dropwise adding is completed to obtain modified organic silicon resin;
mixing acrylic resin and polyimide, heating to 70 ℃, and stirring for 40 min; and adding the crosslinking product, continuing stirring for 50min, adding the modified organic silicon resin, stirring for 1h, finally adding the polybenzimidazole, the filler and the xylene, and stirring and mixing to obtain the surface treating agent.
The contents of the components are shown in table 1 below.
Example 5
The difference from the embodiment 2 is that the high-temperature resistant stainless steel seamless steel pipe comprises a steel pipe main body, wherein the surface of the steel pipe main body is coated with a surface treatment agent, and the surface treatment agent comprises the following components: acrylic resin, polyimide, polyvinyl alcohol emulsion, melamine, polybenzimidazole, filler, xylene, trifluoroethyl methacrylate, a crosslinking agent, phenylmethylsilicone resin and styrene; wherein, the filler is nano zinc oxide, and the cross-linking agent is dicumyl peroxide.
A processing method of a high-temperature resistant stainless steel seamless steel pipe comprises the following steps:
blending the polyvinyl alcohol emulsion, trifluoroethyl methacrylate and a crosslinking agent, and stirring at 80 ℃ for 60min to obtain a crosslinked product;
mixing melamine and benzyl silicone resin, heating to 90 ℃, dropwise adding styrene while stirring, continuing to preserve heat and stirring for 50min after dropwise adding is completed, and obtaining modified organic silicon resin;
mixing acrylic resin and polyimide, heating to 80 ℃, and stirring for 50 min; and adding the crosslinking product, continuing stirring for 60min, adding the modified organic silicon resin, stirring for 1.5h, finally adding the polybenzimidazole, the filler and the xylene, and stirring and mixing to obtain the surface treating agent.
The contents of the components are shown in table 1 below.
Example 6
The difference from the embodiment 3 is that the high-temperature resistant stainless steel seamless steel pipe comprises a steel pipe main body, wherein the surface of the steel pipe main body is coated with a surface treatment agent, and the surface treatment agent comprises the following components: acrylic resin, polyimide, polyvinyl alcohol emulsion, melamine, polybenzimidazole, filler, xylene, trifluoroethyl methacrylate, a crosslinking agent, phenylmethylsilicone resin and styrene; wherein, the filler is nano zinc oxide, and the cross-linking agent is dicumyl peroxide.
A processing method of a high-temperature resistant stainless steel seamless steel pipe comprises the following steps:
blending the polyvinyl alcohol emulsion, trifluoroethyl methacrylate and a crosslinking agent, and stirring at 75 ℃ for 55min to obtain a crosslinked product;
mixing melamine and benzyl silicone resin, heating to 85 ℃, dropwise adding styrene while stirring, continuing to preserve heat and stirring for 45min after dropwise adding is completed, and obtaining modified organic silicon resin;
mixing acrylic resin and polyimide, heating to 75 ℃, and stirring for 45 min; and adding the crosslinking product, continuing stirring for 55min, adding the modified organic silicon resin, stirring for 1.2h, finally adding the polybenzimidazole, the filler and the xylene, and stirring and mixing to obtain the surface treating agent.
The contents of the components are shown in table 1 below.
Example 7
The difference from example 1 is that the surface treating agent further comprises trifluoroethyl methacrylate and dicumyl peroxide which is a crosslinking agent, and the content of each component is shown in table 2 below.
Example 8
The difference from example 7 is that trifluoroethyl methacrylate was replaced with phenylmethyl octanoate, and the contents of the components are shown in table 2 below.
Example 9
The difference from example 8 is that the polyvinyl alcohol emulsion was replaced with polyvinyl alcohol and the content of each component is shown in table 2 below.
Example 10
The difference from example 7 is that the crosslinking agent was replaced with benzoyl peroxide and the contents of the components are shown in table 2 below. The contents of the components are shown in the following table 2.
Example 11
The difference from example 1 is that the surface treatment agent further includes a phenylmethylsilicone resin, and the contents of the components are shown in table 2 below.
Example 12
The difference from example 11 is that the surface treating agent further includes styrene, and the contents of the respective components are shown in table 2 below.
Example 13
The difference from example 12 is that the phenylmethylsilicone resin was replaced with an epoxy resin, and the contents of the components are shown in table 2 below.
Example 14
The difference from example 13 is that styrene was replaced with acetone and the contents of the components are shown in table 2 below.
Example 15
The difference from example 14 is that melamine was replaced by ethylamine and the amounts of the components are shown in table 2 below.
Example 16
The difference from example 1 is that the filler is talc.
Comparative example
Comparative example 1
A stainless seamless steel pipe not coated with the surface treatment agent was used as comparative example 1.
Comparative example 2
The difference from example 1 is that the polyimide was replaced with N-methoxymethylamine, and the contents of the respective components are shown in Table 1 below.
Comparative example 3
The difference from example 1 is that the polyvinyl alcohol emulsion was replaced with polyvinyl alcohol, and the contents of the respective components are shown in table 1 below.
Comparative example 4
The difference from example 1 is that melamine was replaced with ethylamine, and the contents of each component are shown in table 1 below.
Comparative example 5
The difference from example 1 is that polybenzimidazole was replaced with phenylcyclopentylketone, and the contents of the components are shown in Table 1 below.
TABLE 1 component content tables of examples 1 to 6 and comparative examples 2 to 5
| Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | Example 6 | Comparative example 2 | Comparative example 3 | Comparative example 4 | Comparative example 5 | |
| Acrylic resin | 40 | 50 | 45 | 40 | 50 | 45 | 40 | 40 | 40 | 40 |
| polyimide/N-methoxymethyl amine | 8 | 10 | 9 | 8 | 10 | 9 | 8 | 8 | 8 | 8 |
| Polyvinyl alcohol emulsion/polyvinyl alcohol | 4 | 5 | 4 | 4 | 5 | 4 | 4 | 4 | 4 | 4 |
| Melamine/ethylamine | 2 | 3 | 3 | 2 | 3 | 3 | 2 | 2 | 2 | 2 |
| Polybenzimidazole/phenylcyclopentylketones | 0.4 | 0.6 | 0.5 | 0.4 | 0.6 | 0.5 | 0.4 | 0.4 | 0.4 | 0.4 |
| Filler material | 1 | 2 | 2 | 1 | 2 | 2 | 1 | 1 | 1 | 1 |
| Xylene | 9 | 10 | 10 | 9 | 10 | 10 | 9 | 9 | 9 | 9 |
| Trifluoroethyl methacrylate | / | / | / | 1 | 2 | 2 | / | / | / | / |
| Crosslinking agent | / | / | / | 0.3 | 0.4 | 0.3 | / | / | / | / |
| Benzyl silicone resin | / | / | / | 0.8 | 1.2 | 1.0 | / | / | / | / |
| Styrene (meth) acrylic acid ester | / | / | / | 0.3 | 0.4 | 0.3 | / | / | / | / |
TABLE 2 component content tables for examples 7-15
| Example 7 | Example 8 | Example 9 | Example 10 | Example 11 | Example 12 | Example 13 | Example 14 | Example 15 | |
| Acrylic resin | 40 | 40 | 40 | 40 | 40 | 40 | 40 | 40 | 40 |
| Polyimide, polyimide resin composition and polyimide resin composition | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 |
| Polyvinyl alcohol emulsion/polyvinyl alcohol | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 |
| Melamine/ethylamine | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 |
| Polybenzimidazole | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 |
| Filler material | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Xylene | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 |
| Trifluoroethyl methacrylate/phenylmethyl octanoate | 1 | 1 | 1 | 1 | / | / | / | / | / |
| Crosslinking agent | 0.3 | 0.3 | 0.3 | 0.3 | / | / | / | / | / |
| Benzyl silicone resin/epoxy resin | / | / | / | / | 0.8 | 0.8 | 0.8 | 0.8 | 0.8 |
| Styrene/acetone | / | / | / | / | / | 0.3 | 0.3 | 0.3 | 0.3 |
Performance test
The test method comprises the following steps: the surface treatment agents were prepared according to the processing methods of the respective examples and comparative examples, and were coated on stainless steel seamless steel pipe samples of 50mm × 25mm × 3mm, respectively; under the conditions of normal temperature 25 ℃ and 400 ℃, a tensile testing machine is used for testing the yield strength of the sample, the tensile speed is 15mm/min, the yield strength difference between 400 ℃ and normal temperature 25 ℃ is used for representing the high temperature resistance, the smaller the difference is, the higher the mechanical property maintenance degree is, the stronger the high temperature resistance is, and the test results are shown in the following table 3.
TABLE 3 table of the results of the high temperature resistance test of each example and comparative example
| Difference in yield strength (MPa) | |
| Example 1 | 38 |
| Example 2 | 29 |
| Example 3 | 34 |
| Example 4 | 27 |
| Example 5 | 20 |
| Example 6 | 24 |
| Example 7 | 33 |
| Example 8 | 37 |
| Example 9 | 41 |
| Example 10 | 38 |
| Example 11 | 34 |
| Example 12 | 32 |
| Example 13 | 35 |
| Example 14 | 36 |
| Example 15 | 37 |
| Example 16 | 39 |
| Comparative example 1 | 100 |
| Comparative example 2 | 40 |
| Comparative example 3 | 44 |
| Comparative example 4 | 40 |
| Comparative example 5 | 41 |
In summary, the following conclusions can be drawn:
1. the crosslinking reaction of the trifluoroethyl methacrylate and the polyvinyl alcohol emulsion can generate a synergistic effect, which is beneficial to improving the performance of the surface treating agent and improving the high temperature resistance of the stainless steel seamless steel pipe.
2. The common addition of the benzyl silicone resin, the styrene and the melamine has a synergistic effect on the improvement of the performance of the surface treating agent, and the high temperature resistance of the stainless steel seamless steel pipe coated with the surface treating agent can be effectively improved.
3. The surface treating agent prepared by the method has an excellent effect of improving the high-temperature resistance of the stainless steel seamless steel pipe.
The present embodiment is only for explaining the present application, and the protection scope of the present application is not limited thereby, and those skilled in the art can make modifications to the present embodiment without inventive contribution as needed after reading the present specification, but all are protected by patent law within the scope of the claims of the present application.
Claims (9)
1. The utility model provides a high temperature resistant stainless steel seamless steel pipe, includes the steel pipe main part, its characterized in that: the surface treatment agent is coated on the surface of the steel pipe main body and comprises the following components in parts by weight:
40-50 parts of acrylic resin;
8-10 parts of polyimide;
4-5 parts of polyvinyl alcohol emulsion;
2-3 parts of melamine;
0.4-0.6 parts of polybenzimidazole;
1-2 parts of a filler;
9-10 parts of dimethylbenzene.
2. The high temperature resistant stainless steel seamless steel tube of claim 1, characterized in that: the preparation method of the polyvinyl alcohol emulsion comprises the following steps: dispersing 6-8 parts of polyvinyl alcohol, 12-15 parts of polyetheramine and 2-3 parts of diisobutyl naphthalene sulfonate by ultrasonic waves with the ultrasonic power of 100-150W and the frequency of 20-30kHz for 20-30min to obtain the polyvinyl alcohol emulsion.
3. The high temperature resistant stainless steel seamless steel tube of claim 2, wherein: the surface treating agent also comprises 1-2 parts of trifluoroethyl methacrylate and 0.3-0.4 part of a cross-linking agent in parts by weight.
4. The high temperature resistant stainless steel seamless steel tube of claim 1, characterized in that: the surface treating agent also comprises 0.8-1.2 parts of benzyl silicone resin by weight.
5. The high temperature resistant stainless steel seamless steel tube of claim 4, wherein: the surface treating agent also comprises 0.3-0.4 part of styrene by weight.
6. A high temperature resistant stainless steel seamless steel tube according to claim 3, characterized in that: the cross-linking agent is dicumyl peroxide.
7. The high temperature resistant stainless steel seamless steel tube of claim 1, characterized in that: the filler is nano zinc oxide.
8. The method for processing the high-temperature-resistant stainless steel seamless steel pipe as claimed in claim 1, characterized by comprising the following steps:
s1, preparing a surface treating agent; firstly, mixing acrylic resin and polyimide, heating to 70-80 ℃, and stirring for 40-50 min; adding the polyvinyl alcohol emulsion, continuing to stir for 30-35min, adding the melamine, stirring for 40-45min, finally adding the polybenzimidazole, the filler and the xylene, and stirring and mixing to prepare the surface treating agent;
s2, coating a surface treatment agent; after the steel pipe main body is subjected to shot blasting rust removal and high-pressure gas ash removal, heating the steel pipe main body to 120-130 ℃, spraying the surface treating agent prepared in the step S1 on the steel pipe main body by using an airless sprayer, and then preserving heat at the temperature of 120-130 ℃ for 12-15min to solidify the coating to form a high-temperature resistant layer; and cooling by using circulating water to prepare the high-temperature-resistant stainless steel seamless steel tube.
9. The method for processing the high-temperature-resistant stainless steel seamless steel pipe according to claim 8, wherein the method comprises the following steps: also comprises the following steps: in the S1, 4-5 parts of polyvinyl alcohol emulsion, 1-2 parts of trifluoroethyl methacrylate and 0.3-0.4 part of cross-linking agent are blended and stirred for 50-60min at 70-80 ℃ to obtain a cross-linked product;
mixing 2-3 parts of melamine and 0.8-1.2 parts of benzyl silicone resin, heating to 80-90 ℃, dropwise adding 0.3-0.4 part of styrene while stirring until the dropwise addition is completed, continuously preserving heat and stirring for 40-50min to obtain modified organic silicon resin;
mixing 40-50 parts of acrylic resin and 8-10 parts of polyimide, heating to 70-80 ℃, and stirring for 40-50 min; and adding the crosslinking product, continuing stirring for 50-60min, adding the modified organic silicon resin, stirring for 1-1.5h, finally adding 0.4-0.6 part of polybenzimidazole, 1-2 parts of filler and 9-10 parts of xylene, and stirring and mixing to obtain the surface treating agent.
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| CN115522209A (en) * | 2022-10-09 | 2022-12-27 | 浙江丰业集团有限公司 | Steel strengthening treatment liquid and steel treatment process |
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