CN113372769B - Wear-resistant corrosion-resistant oil pipeline flange and processing technology thereof - Google Patents
Wear-resistant corrosion-resistant oil pipeline flange and processing technology thereof Download PDFInfo
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- CN113372769B CN113372769B CN202110626658.3A CN202110626658A CN113372769B CN 113372769 B CN113372769 B CN 113372769B CN 202110626658 A CN202110626658 A CN 202110626658A CN 113372769 B CN113372769 B CN 113372769B
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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
- C09D127/00—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 a halogen; Coating compositions based on derivatives of such polymers
- C09D127/02—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 a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment
- C09D127/04—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 a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
- C09D127/06—Homopolymers or copolymers of vinyl chloride
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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
- 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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/63—Additives non-macromolecular organic
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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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/65—Additives macromolecular
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
- C23C2/06—Zinc or cadmium or alloys based thereon
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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 discloses a wear-resistant corrosion-resistant flange for an oil pipeline and a processing technology thereof, and the flange is prepared by galvanizing a flange and then coating a coating; the coating is prepared from the following raw materials, by weight, 50-60 parts of polyvinyl chloride, 1-2 parts of plasticizer, 2-3 parts of organic siloxane, 1-2 parts of organic silicone oil and 1-2 parts of corrosion inhibitor, wherein the plasticizer is naphthenic acid and dioctyl adipate, and the organic siloxane is polyether modified siloxane; the polyether modified siloxane is prepared from hydrogen-containing silicone oil, allyl polyether, 2, 6-di-tert-butyl-p-phenol and a catalyst, wherein the catalyst is chloroplatinic acid. According to the invention, the flange can be effectively prevented from being corroded by galvanizing the surface of the flange, and the heating temperature is controlled to be 450-460 ℃ in the hot galvanizing process and is carried out within 3-5min after drying, so that the deformation caused by the galvanizing treatment due to long time interval is prevented.
Description
Technical Field
The invention relates to the technical field of flange preparation, in particular to a wear-resistant corrosion-resistant flange for an oil pipeline and a processing technology thereof.
Background
The flange is a part used for connecting the shaft with the shaft, the main raw material of the flange is carbon steel, the carbon steel is an alloy metal with the carbon content of 0.0218% -2.11%, and the carbon steel generally contains a small amount of elements such as manganese, silicon, sulfur and the like, and the flange can be divided into low carbon steel, medium carbon steel and high carbon steel according to the carbon content in the using process.
The galvanized surface is a common rust-proof, corrosion-proof and abrasion-proof process on the market, wherein the galvanized process is used most widely, the galvanized surface of the flange can effectively protect the inside of the flange to achieve the purpose of corrosion resistance and abrasion resistance, but the phenomena of collision, scratch and the like inevitably occur in the construction process, the zinc layer is abraded, the abraded part is exposed out of the flange, and the abrasion resistance and the corrosion resistance of the flange are reduced, so the flange for the wear-resistant and corrosion-resistant oil pipeline and the processing process thereof are particularly important.
Disclosure of Invention
The invention aims to provide a wear-resistant corrosion-resistant oil pipeline flange and a processing technology thereof, and aims to solve the problems in the background technology.
In order to solve the technical problems, the invention provides the following technical scheme: a wear-resistant corrosion-resistant oil pipeline flange is prepared by galvanizing a flange and then coating a coating;
the coating is prepared from the following raw materials, by weight, 50-60 parts of polyvinyl chloride, 1-2 parts of plasticizer, 2-3 parts of organic siloxane, 1-2 parts of organic silicone oil and 1-2 parts of corrosion inhibitor.
Further, the plasticizer is naphthenic acid and dioctyl adipate.
Further, the organic siloxane is polyether modified siloxane;
the polyether modified siloxane is prepared from hydrogen-containing silicone oil, allyl polyether, 2, 6-di-tert-butyl-p-phenol and a catalyst.
Further, the catalyst is chloroplatinic acid.
Further, the corrosion inhibitor is diethylenetriamine, benzotriazole and 2, 6-di-tert-butyl-p-phenol.
A processing technology of a wear-resistant corrosion-resistant flange for an oil pipeline comprises the following steps,
s1, flange galvanization:
(1) acid washing: pickling the surface of the flange by using acid liquor;
(2) pretreatment: soaking the acid-washed flange in a plating assistant agent, and drying;
(3) hot galvanizing: heating the dried flange, carrying out hot galvanizing treatment on the flange, passivating after the hot galvanizing is finished, and cooling to obtain a galvanized flange;
s2, preparation of the coating:
(1) respectively heating hydrogen-containing silicone oil and allyl alcohol polyether to remove water;
(2) mixing the hydrogen-containing silicone oil after removing water with allyl alcohol polyether, adding toluene, stirring uniformly, adding 2, 6-di-tert-butyl-p-phenol, introducing nitrogen, heating, adding a catalyst, heating, distilling after the reaction is finished to obtain polyether modified siloxane, and recovering the solvent;
(3) mixing naphthenic acid and diethylenetriamine, adding the recovered solvent after uniformly stirring, carrying out reflux heating, then heating, adding polyvinyl chloride, stirring, cooling after uniformly stirring, and adding benzotriazole, dioctyl adipate, polyether modified siloxane and benzotriazole during cooling to obtain a coating;
s3, coating: and washing the surface of the galvanized flange by using deionized water, drying, and coating by using a coating to obtain the flange for the pipeline.
Further, the concrete steps are as follows,
s1, flange galvanization:
(1) acid washing: pickling the surface of the flange by using sulfuric acid solution with the concentration of 15%, wherein the pickling temperature is 20-30 ℃;
(2) pretreatment: mixing ammonium chloride and zinc chloride to obtain a soaking solution, soaking the flange subjected to acid washing in the soaking solution, heating at 70-75 ℃ for 1-2min, and drying at 80-90 ℃;
(3) hot galvanizing: heating the dried flange at the temperature of 450-460 ℃, carrying out hot galvanizing treatment on the flange, passivating after the hot galvanizing is finished, and cooling to obtain a galvanized flange;
common flanges on the market are used as a main body, the surfaces of the flanges are pickled and subjected to surface treatment, the flanges subjected to surface treatment are placed into a soaking solution containing ammonium chloride and zinc chloride to be soaked, the flanges are dried after being soaked at 70-75 ℃, the flanges are prevented from deforming due to sudden rise of temperature, residual moisture is removed, and the phenomenon of zinc explosion can be prevented.
According to the method, the flange can be effectively prevented from being corroded by performing the galvanizing treatment on the surface of the flange, and the heating temperature is controlled to be 450-460 ℃ in the hot galvanizing process and is performed within 3-5min after drying, so that the flange is prevented from being reduced in temperature due to long time intervals and then deformed during the galvanizing treatment.
This application can prevent effectively that the flange from corroding after carrying out the galvanizing treatment on the flange surface, but because the surface is the galvanizing treatment, inevitably can and other metal in the use of reality, ground, contact such as pipeline takes place to scratch, can inevitably lead to the surperficial zinc layer of flange to scratch to wipe, and then lead to scratching the position and lost the protection on zinc layer, and then take place to corrode, consequently, this application is on the zinc layer basis originally, the coating of the main raw materials of coating one deck with polyvinyl chloride, and then when taking place to scratch, protection zinc layer protection flange, and then reach the wear-resisting corrosion resisting property who improves the flange.
S2, preparation of the coating:
(1) respectively heating hydrogen-containing silicone oil and allyl alcohol polyether at the temperature of removing water;
(2) mixing the hydrogen-containing silicone oil with the water removed with the allyl alcohol polyether, adding toluene, stirring uniformly, adding 2, 6-di-tert-butyl-p-phenol, introducing nitrogen, heating to 60-65 ℃, adding a catalyst, heating to 80-85 ℃, distilling after the reaction is finished to obtain polyether modified siloxane, and recovering the solvent;
the application uses hydrogen-containing silicone oil to react with the allyl alcohol polyether to generate polyether modified siloxane, the generated polyether modified siloxane is used as a leveling agent, the wear resistance of a flange can be improved after coating, excessive allyl alcohol polyether is selectively added in the application on the addition of the hydrogen-containing silicone oil and the allyl alcohol polyether, on one hand, all hydrogen-containing silicone oil can be reacted, and further, the yield of a product is maximized, on the other hand, the residual allyl alcohol polyether can be used as the leveling agent to improve a coating, so that the surface of the coating is smoother, and further, a certain anti-blocking effect is achieved, correspondingly, because a large amount of allyl alcohol polyether is added, side reactions such as self-polymerization, oxidation and the like occur in the reaction process, and further, the yield of the product is reduced, therefore, 2, 6-di-tert-butyl phenol is added in the application, and nitrogen needs to be introduced in the reaction process, and the reaction is carried out in the nitrogen atmosphere, so that the generation of side reactions can be reduced.
(3) Mixing naphthenic acid and diethylenetriamine, uniformly stirring, adding a recovered solvent, stirring, performing reflux heating at the temperature of 140-;
naphthenic acid is a common and very effective plasticizer of polyvinyl chloride, the addition of the naphthenic acid can improve the comprehensive performance of a coating, the wear resistance and corrosion resistance of a flange can be obviously improved by coating the naphthenic acid on the surface of the galvanized flange, but the naphthenic acid has certain corrosivity to metal, particularly lead and zinc, but the naphthenic acid is used for mixing the naphthenic acid with diethylenetriamine to prepare an imidazoline corrosion inhibitor through reaction, the corrosion resistance of the flange can be improved by the obtained corrosion inhibitor, and the corrosion degree of the naphthenic acid to a zinc layer can be reduced.
In the preparation of polyether modified siloxane, toluene is used as an organic solvent and is recycled for secondary use, when naphthenic acid is treated, water is generated in the reaction, a water carrying agent needs to be added, and the recycled toluene is selected and used in the selection of the water carrying agent, so that the addition of the toluene can be reduced, the content of the toluene in the environment and the product can be reduced, and the production cost can be reduced.
S3, coating: and washing the surface of the galvanized flange by using deionized water, drying, and coating by using a coating to obtain the flange for the pipeline.
Further, in the step S2(2), the moisture content of the hydrogen-containing silicone oil and the allyl alcohol polyether is 0.01%, and the molar ratio of the added hydrogen-containing silicone oil to the added allyl alcohol polyether is 1: 2.5-3.
Further, in step S2(3), the temperature increase rate is 10 to 12 ℃/h.
Compared with the prior art, the invention has the following beneficial effects: the flange is a part used for connecting the shaft with the shaft, and is mainly prepared by carbon steel through a series of methods, the carbon steel is alloy metal with the carbon content of 0.0218% -2.11%, a layer of metal film is plugged on the surface of the carbon steel in the daily use process, and the corrosion resistance of the flange can be effectively improved.
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. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
A wear-resistant corrosion-resistant oil pipeline flange is prepared by galvanizing a flange and then coating a coating;
the coating is prepared from the following raw materials, by weight, 50 parts of polyvinyl chloride, 1 part of plasticizer, 2 parts of organosiloxane, 1 part of silicone oil and 1 part of corrosion inhibitor.
The plasticizer is naphthenic acid and dioctyl adipate.
The organic siloxane is polyether modified siloxane;
the polyether modified siloxane is prepared from hydrogen-containing silicone oil, allyl polyether, 2, 6-di-tert-butyl-p-phenol and a catalyst.
The catalyst is chloroplatinic acid.
The corrosion inhibitor is diethylenetriamine, benzotriazole and 2, 6-di-tert-butyl-p-phenol.
A processing technology of a wear-resistant corrosion-resistant flange for an oil pipeline comprises the following steps,
s1, flange galvanization:
(1) acid washing: pickling the surface of the flange by using sulfuric acid solution with the concentration of 15%, wherein the pickling temperature is 20 ℃;
(2) pretreatment: mixing ammonium chloride and zinc chloride to obtain a soaking solution, soaking the flange subjected to acid washing in the soaking solution, heating at 70 ℃, soaking for 1min, and drying at 80 ℃;
(3) hot galvanizing: heating the dried flange to 450 ℃, carrying out hot galvanizing treatment on the flange, passivating after the hot galvanizing is finished, and cooling to obtain a galvanized flange;
s2, preparation of the coating:
(1) respectively heating hydrogen-containing silicone oil and allyl alcohol polyether at the temperature of removing water;
(2) mixing the hydrogen-containing silicone oil after moisture removal with the allyl alcohol polyether, wherein the moisture content of the hydrogen-containing silicone oil and the allyl alcohol polyether is 0.01%, the molar ratio of the added hydrogen-containing silicone oil to the allyl alcohol polyether is 1:2.5, adding toluene, stirring uniformly, adding 2, 6-di-tert-butyl-p-phenol, introducing nitrogen, heating at the temperature of 60 ℃, adding a catalyst, heating at the temperature of 80 ℃, distilling after the reaction is finished to obtain polyether modified siloxane, and recovering the solvent;
(3) mixing naphthenic acid and diethylenetriamine, adding the recovered solvent after uniformly stirring, carrying out reflux heating at the temperature of 140 ℃ for 1h, then heating, adding polyvinyl chloride at the temperature of 190 ℃ at the heating rate of 10 ℃/h, stirring, cooling after uniformly stirring, and adding benzotriazole, dioctyl adipate, polyether modified siloxane and benzotriazole during cooling to obtain a coating;
s3, coating: and washing the surface of the galvanized flange by using deionized water, drying, and coating by using a coating to obtain the flange for the pipeline.
Example 2
A wear-resistant corrosion-resistant oil pipeline flange is prepared by galvanizing a flange and then coating a coating;
the coating is prepared from the following raw materials, by weight, 55 parts of polyvinyl chloride, 1.5 parts of plasticizer, 2.5 parts of organic siloxane, 1.5 parts of organic silicone oil and 1.5 parts of corrosion inhibitor.
The plasticizer is naphthenic acid and dioctyl adipate.
The organic siloxane is polyether modified siloxane;
the polyether modified siloxane is prepared from hydrogen-containing silicone oil, allyl polyether, 2, 6-di-tert-butyl-p-phenol and a catalyst.
The catalyst is chloroplatinic acid.
The corrosion inhibitor is diethylenetriamine, benzotriazole and 2, 6-di-tert-butyl-p-phenol.
A processing technology of a wear-resistant corrosion-resistant flange for an oil pipeline comprises the following steps,
s1, flange galvanization:
(1) acid washing: pickling the surface of the flange by using sulfuric acid solution with the concentration of 15%, wherein the pickling temperature is 25 ℃;
(2) pretreatment: mixing ammonium chloride and zinc chloride to obtain a soaking solution, soaking the flange subjected to acid washing in the soaking solution, heating at 73 ℃, soaking for 1.5min, and drying at 85 ℃;
(3) hot galvanizing: heating the dried flange at 455 ℃, carrying out hot galvanizing treatment on the flange, passivating after the hot galvanizing is finished, and cooling to obtain a galvanized flange;
s2, preparation of the coating:
(1) respectively heating hydrogen-containing silicone oil and allyl alcohol polyether at the temperature of removing water;
(2) mixing the hydrogen-containing silicone oil after moisture removal with the allyl alcohol polyether, wherein the moisture content of the hydrogen-containing silicone oil and the allyl alcohol polyether is 0.01%, the molar ratio of the added hydrogen-containing silicone oil to the allyl alcohol polyether is 1:2.7, adding toluene, stirring uniformly, adding 2, 6-di-tert-butyl-p-phenol, introducing nitrogen, heating at 63 ℃, adding a catalyst, heating at 83 ℃, distilling after the reaction is finished to obtain polyether modified siloxane, and recovering the solvent;
(3) mixing naphthenic acid and diethylenetriamine, adding the recovered solvent after uniformly stirring, carrying out reflux heating at the temperature of 145 ℃ for 1h, then heating, adding polyvinyl chloride at the temperature of 195 ℃ at the heating rate of 11 ℃/h, stirring, cooling after uniformly stirring, and adding benzotriazole, dioctyl adipate, polyether modified siloxane and benzotriazole during cooling to obtain a coating;
s3, coating: and washing the surface of the galvanized flange by using deionized water, drying, and coating by using a coating to obtain the flange for the pipeline.
Example 3
A wear-resistant corrosion-resistant oil pipeline flange is prepared by galvanizing a flange and then coating a coating;
the coating is prepared from the following raw materials, by weight, 60 parts of polyvinyl chloride, 2 parts of plasticizer, 3 parts of organic siloxane, 2 parts of organic silicone oil and 2 parts of corrosion inhibitor.
The plasticizer is naphthenic acid and dioctyl adipate.
The organic siloxane is polyether modified siloxane;
the polyether modified siloxane is prepared from hydrogen-containing silicone oil, allyl polyether, 2, 6-di-tert-butyl-p-phenol and a catalyst.
The catalyst is chloroplatinic acid.
The corrosion inhibitor is diethylenetriamine, benzotriazole and 2, 6-di-tert-butyl-p-phenol.
A processing technology of a wear-resistant corrosion-resistant flange for an oil pipeline comprises the following steps,
s1, flange galvanization:
(1) acid washing: pickling the surface of the flange by using sulfuric acid solution with the concentration of 15%, wherein the pickling temperature is 30 ℃;
(2) pretreatment: mixing ammonium chloride and zinc chloride to obtain a soaking solution, soaking the flange subjected to acid washing in the soaking solution, heating at 75 ℃ for 2min, and drying at 90 ℃;
(3) hot galvanizing: heating the dried flange at 460 ℃, carrying out hot galvanizing treatment on the flange, passivating after the hot galvanizing is finished, and cooling to obtain a galvanized flange;
s2, preparation of the coating:
(1) respectively heating hydrogen-containing silicone oil and allyl alcohol polyether at the temperature of removing water;
(2) mixing the hydrogen-containing silicone oil after moisture removal with the allyl alcohol polyether, wherein the moisture content of the hydrogen-containing silicone oil and the allyl alcohol polyether is 0.01%, the molar ratio of the added hydrogen-containing silicone oil to the allyl alcohol polyether is 1:3, adding toluene, stirring uniformly, adding 2, 6-di-tert-butyl-p-phenol, introducing nitrogen, heating at 65 ℃, adding a catalyst, heating at 85 ℃, distilling after reaction to obtain polyether modified siloxane, and recovering the solvent;
(3) mixing naphthenic acid and diethylenetriamine, adding the recovered solvent after uniformly stirring, carrying out reflux heating at the temperature of 150 ℃ for 1h, then heating at the temperature of 12 ℃/h and at the temperature of 200 ℃, adding polyvinyl chloride, stirring, cooling after uniformly stirring, and adding benzotriazole, dioctyl adipate, polyether modified siloxane and benzotriazole during cooling to obtain a coating;
s3, coating: and washing the surface of the galvanized flange by using deionized water, drying, and coating by using a coating to obtain the flange for the pipeline.
Comparative example 1
A wear-resistant corrosion-resistant oil pipeline flange is prepared by galvanizing a flange and then coating a coating;
the coating is prepared from the following raw materials, by weight, 60 parts of polyvinyl chloride, 2 parts of plasticizer, 3 parts of organic siloxane, 2 parts of organic silicone oil and 2 parts of corrosion inhibitor.
The plasticizer is naphthenic acid and dioctyl adipate.
The organic siloxane is polyether modified siloxane;
the polyether modified siloxane is prepared from hydrogen-containing silicone oil, allyl polyether, 2, 6-di-tert-butyl-p-phenol and a catalyst.
The catalyst is chloroplatinic acid.
The corrosion inhibitor is diethylenetriamine, benzotriazole and 2, 6-di-tert-butyl-p-phenol.
A processing technology of a wear-resistant corrosion-resistant flange for an oil pipeline comprises the following steps,
s1, flange galvanization:
(1) acid washing: pickling the surface of the flange by using sulfuric acid solution with the concentration of 15%, wherein the pickling temperature is 30 ℃;
(2) pretreatment: mixing ammonium chloride and zinc chloride to obtain a soaking solution, soaking the flange subjected to acid washing in the soaking solution, heating at 75 ℃ for 2min, and drying at 90 ℃;
(3) hot galvanizing: heating the dried flange at 460 ℃, carrying out hot galvanizing treatment on the flange, passivating after the hot galvanizing is finished, and cooling to obtain a galvanized flange;
s2, preparation of the coating:
(1) respectively heating hydrogen-containing silicone oil and allyl alcohol polyether at the temperature of removing water;
(2) mixing the hydrogen-containing silicone oil after moisture removal with the allyl alcohol polyether, wherein the moisture content of the hydrogen-containing silicone oil and the allyl alcohol polyether is 0.01%, the molar ratio of the added hydrogen-containing silicone oil to the allyl alcohol polyether is 1:3, adding toluene, stirring uniformly, adding 2, 6-di-tert-butyl-p-phenol, introducing nitrogen, heating at 65 ℃, adding a catalyst, heating at 85 ℃, distilling after reaction to obtain polyether modified siloxane, and recovering the solvent;
(3) mixing naphthenic acid and diethylenetriamine, adding the recovered solvent after uniformly stirring, carrying out reflux heating at the temperature of 150 ℃ for 1h, then heating at the temperature of 12 ℃/h and at the temperature of 200 ℃, adding polyvinyl chloride, stirring, cooling after uniformly stirring, and adding benzotriazole, dioctyl adipate, polyether modified siloxane and benzotriazole during cooling to obtain a coating;
s3, coating: and washing the surface of the galvanized flange by using deionized water, drying, and coating by using a coating to obtain the flange for the pipeline.
Comparative example 2
A wear-resistant corrosion-resistant oil pipeline flange is prepared by galvanizing a flange and then coating a coating;
the coating is prepared from the following raw materials, by weight, 60 parts of polyvinyl chloride, 2 parts of plasticizer, 3 parts of organic siloxane, 2 parts of organic silicone oil and 2 parts of corrosion inhibitor.
The plasticizer is naphthenic acid and dioctyl adipate.
The organic siloxane is polyether modified siloxane;
the polyether modified siloxane is prepared from hydrogen-containing silicone oil, allyl polyether, 2, 6-di-tert-butyl-p-phenol and a catalyst.
The catalyst is chloroplatinic acid.
The corrosion inhibitor is diethylenetriamine, benzotriazole and 2, 6-di-tert-butyl-p-phenol.
A processing technology of a wear-resistant corrosion-resistant flange for an oil pipeline comprises the following steps,
s1, flange galvanization:
(1) acid washing: pickling the surface of the flange by using sulfuric acid solution with the concentration of 15%, wherein the pickling temperature is 30 ℃;
(2) pretreatment: mixing ammonium chloride and zinc chloride to obtain a soaking solution, soaking the flange subjected to acid washing in the soaking solution, heating at 75 ℃ for 2min, and drying at 90 ℃;
(3) hot galvanizing: heating the dried flange at 460 ℃, carrying out hot galvanizing treatment on the flange, passivating after the hot galvanizing is finished, and cooling to obtain a galvanized flange;
s2, preparation of the coating:
(1) respectively heating hydrogen-containing silicone oil and allyl alcohol polyether at the temperature of removing water;
(2) mixing the hydrogen-containing silicone oil after moisture removal with the allyl alcohol polyether, wherein the moisture content of the hydrogen-containing silicone oil and the allyl alcohol polyether is 0.01%, the molar ratio of the added hydrogen-containing silicone oil to the allyl alcohol polyether is 1:3, adding toluene, stirring uniformly, adding 2, 6-di-tert-butyl-p-phenol, introducing nitrogen, heating at 65 ℃, adding a catalyst, heating at 85 ℃, distilling after reaction to obtain polyether modified siloxane, and recovering the solvent;
(3) mixing naphthenic acid and diethylenetriamine, adding a recovered solvent after uniformly stirring, heating under reflux at the temperature of 150 ℃ for 1h, then heating at the temperature of 12 ℃/h and at the temperature of 200 ℃, adding polyvinyl chloride, stirring, cooling after uniformly stirring, and adding benzotriazole, dioctyl adipate, polyether modified siloxane and benzotriazole during cooling to obtain a coating;
s3, coating: and washing the surface of the galvanized flange by using deionized water, drying, and coating by using a coating to obtain the flange for the pipeline.
Comparative example 3
A wear-resistant corrosion-resistant oil pipeline flange is prepared by galvanizing a flange and then coating a coating;
the coating is prepared from the following raw materials, by weight, 60 parts of polyvinyl chloride, 2 parts of plasticizer, 3 parts of organic siloxane, 2 parts of organic silicone oil and 2 parts of corrosion inhibitor.
The plasticizer is naphthenic acid and dioctyl adipate.
The organic siloxane is polyether modified siloxane;
the polyether modified siloxane is prepared from hydrogen-containing silicone oil, allyl polyether, 2, 6-di-tert-butyl-p-phenol and a catalyst.
The catalyst is chloroplatinic acid.
The corrosion inhibitor is diethylenetriamine, benzotriazole and 2, 6-di-tert-butyl-p-phenol.
A processing technology of a wear-resistant corrosion-resistant flange for an oil pipeline comprises the following steps,
s1, flange galvanization:
(1) acid washing: pickling the surface of the flange by using sulfuric acid solution with the concentration of 15%, wherein the pickling temperature is 30 ℃;
(2) pretreatment: mixing ammonium chloride and zinc chloride to obtain a soaking solution, soaking the flange subjected to acid washing in the soaking solution, heating at 75 ℃ for 2min, and drying at 90 ℃;
(3) hot galvanizing: heating the dried flange at 460 ℃, carrying out hot galvanizing treatment on the flange, passivating after the hot galvanizing is finished, and cooling to obtain a galvanized flange;
s2, preparation of the coating:
(1) respectively heating hydrogen-containing silicone oil and allyl alcohol polyether at the temperature of removing water;
(2) mixing the hydrogen-containing silicone oil after moisture removal with the allyl alcohol polyether, wherein the moisture content of the hydrogen-containing silicone oil and the allyl alcohol polyether is 0.01%, the molar ratio of the added hydrogen-containing silicone oil to the allyl alcohol polyether is 1:3, adding toluene, stirring uniformly, adding 2, 6-di-tert-butyl-p-phenol, introducing nitrogen, heating at 65 ℃, adding a catalyst, heating at 85 ℃, distilling after reaction to obtain polyether modified siloxane, and recovering the solvent;
(3) mixing naphthenic acid and diethylenetriamine, adding the recovered solvent after uniformly stirring, carrying out reflux heating at the temperature of 150 ℃ for 1h, then heating at the temperature of 12 ℃/h and at the temperature of 200 ℃, adding polyvinyl chloride, stirring, cooling after uniformly stirring, and adding benzotriazole, dioctyl adipate, polyether modified siloxane and benzotriazole during cooling to obtain a coating;
s3, coating: and washing the surface of the galvanized flange by using deionized water, drying, and coating by using a coating to obtain the flange for the pipeline.
Experiment of
Using example 3 as a control, comparative examples 1, 2 and 3 were set, wherein comparative example 1 was conducted without the treatment of the zinc plating coating, comparative example 2 was conducted without the treatment of the coating, comparative example 3 was conducted without the recovery of the solvent toluene, and comparative example 4 was conducted without the treatment of naphthenic acid.
The coatings of examples 1, 2, 3, and 4 were analyzed, and the results were as follows,
| experimental group | Toluene% | Heavy metals (Pb, Cd, Hg) mg/L |
| Example 1 | 2 | --- |
| Example 2 | 1 | --- |
| Example 3 | 2 | --- |
| Comparative example 1 | --- | --- |
| Comparative example 2 | --- | --- |
| Comparative example 3 | 9 | --- |
| Comparative example 4 | --- | --- |
Watch 1
The samples of example 1, example 2, example 3, comparative example 1, comparative example 2, comparative example 3, comparative example 4 were degreased, followed by a wear rate test (wear rate ═ weight of sample before test-weight of sample after test)/weight of sample before test) with the following results,
| experimental group | Wear rate (%) |
| Example 1 | 0.5 |
| Example 2 | 0.4 |
| Example 3 | 0.6 |
| Comparative example 1 | 9.7 |
| Comparative example 2 | 8.4 |
| Comparative example 3 | 0.5 |
| Comparative example 4 | 2.6 |
Watch two
The fact that the galvanized coating treatment is not carried out in the comparative example 1 results in higher wear rate in the comparative example 1 compared with the wear rates in the examples 1, 2 and 3, and shows that the preparation processes using the galvanized coating in the examples 1, 2 and 3 have certain effects and can obviously improve the wear resistance of products.
The absence of the coating treatment in comparative example 2, which results in a higher wear rate in comparative example 2 relative to examples 1, 2 and 3 than in comparative example 1, indicates that galvanization can increase the wear resistance of the flange and that the coating applied also has a certain wear resistance.
In comparative example 3, the toluene solvent is not recovered, so that the toluene content in comparative example 3 is higher than that in examples 1, 2 and 3, because the toluene is repeatedly used in examples 1, 2 and 3, and the toluene residue can be greatly reduced.
The reason why the naphthenic acid is not treated in the comparative example 4 is that the wear rate of the comparative example 4 is higher than that of the examples 1, 2 and 3 because the examples 1, 2 and 3 can reduce the residue of the naphthenic acid and enhance the wear resistance by adding diethylenetriamine to react with the naphthenic acid, and can generate a leveling agent and enhance the wear resistance of the flange.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (3)
1. The utility model provides a wear-resisting corrosion-resistant flange for oil pipeline which characterized in that: the flange for the pipeline is prepared by galvanizing the flange and then coating paint;
the coating is prepared from the following raw materials, by weight, 50-60 parts of polyvinyl chloride, 1-2 parts of plasticizer, 2-3 parts of organosiloxane, 1-2 parts of organic silicone oil and 1-2 parts of corrosion inhibitor;
the plasticizer is naphthenic acid and dioctyl adipate;
the organic siloxane is polyether modified siloxane;
the polyether modified siloxane is prepared from hydrogen-containing silicone oil, allyl polyether, 2, 6-di-tert-butyl-p-phenol and a catalyst;
the catalyst is chloroplatinic acid;
the corrosion inhibitor is diethylenetriamine, benzotriazole and 2, 6-di-tert-butyl-p-phenol;
a processing technology of a wear-resistant corrosion-resistant flange for an oil pipeline comprises the following steps,
s1, flange galvanization:
(1) acid washing: pickling the surface of the flange by using acid liquor;
(2) pretreatment: soaking the pickled flange in a soaking solution, and drying;
(3) hot galvanizing: heating the dried flange, carrying out hot galvanizing treatment on the flange, passivating after the hot galvanizing is finished, and cooling to obtain a galvanized flange;
s2, preparation of the coating:
(1) respectively heating hydrogen-containing silicone oil and allyl alcohol polyether to remove water;
(2) mixing the hydrogen-containing silicone oil after removing water with allyl alcohol polyether, adding toluene, stirring uniformly, adding 2, 6-di-tert-butyl-p-phenol, introducing nitrogen, heating, adding a catalyst, heating, distilling after the reaction is finished to obtain polyether modified siloxane, and recovering the solvent;
(3) mixing naphthenic acid and diethylenetriamine, adding the recovered solvent after uniformly stirring, carrying out reflux heating, then heating, adding polyvinyl chloride, stirring, cooling after uniformly stirring, and adding benzotriazole, dioctyl adipate, polyether modified siloxane and benzotriazole during cooling to obtain a coating;
s3, coating: washing the surface of the galvanized flange by using deionized water, drying, and coating by using a coating to obtain a flange for a pipeline;
in the step S2(2), the moisture content of the hydrogen-containing silicone oil and the allyl alcohol polyether is 0.01%, and the molar ratio of the added hydrogen-containing silicone oil to the added allyl alcohol polyether is 1: 2.5-3.
2. The processing technology of the wear-resistant corrosion-resistant oil pipeline flange according to claim 1, characterized in that: the specific steps are as follows,
s1, flange galvanization:
(1) acid washing: pickling the surface of the flange by using sulfuric acid solution with the concentration of 15%, wherein the pickling temperature is 20-30 ℃;
(2) pretreatment: mixing ammonium chloride and zinc chloride to obtain soaking solution, soaking the acid-washed flange in the soaking solution, heating at 70-75 deg.C for 1-2min, and oven drying at 80-90 deg.C;
(3) hot galvanizing: heating the dried flange at the temperature of 450-460 ℃, carrying out hot galvanizing treatment on the flange, passivating after the hot galvanizing is finished, and cooling to obtain a galvanized flange;
s2, preparation of the coating:
(1) respectively heating hydrogen-containing silicone oil and allyl alcohol polyether at the temperature of removing water;
(2) mixing the hydrogen-containing silicone oil after removing water with allyl alcohol polyether, adding toluene, stirring uniformly, adding 2, 6-di-tert-butyl-p-phenol, introducing nitrogen, heating at the temperature of 60-65 ℃, adding a catalyst, heating at the temperature of 80-85 ℃, distilling after the reaction is finished to obtain polyether modified siloxane, and recovering the solvent;
(3) mixing naphthenic acid and diethylenetriamine, adding the recovered solvent after uniformly stirring, refluxing and heating at the temperature of 140-150 ℃ and the reaction time of 1h, then heating at the temperature of 190-200 ℃, adding polyvinyl chloride, stirring, cooling after uniformly stirring, and adding benzotriazole, dioctyl adipate, polyether modified siloxane and benzotriazole during cooling to obtain the coating;
s3, coating: and washing the surface of the galvanized flange by using deionized water, drying, and coating by using a coating to obtain the flange for the pipeline.
3. The processing technology of the wear-resistant corrosion-resistant oil pipeline flange according to claim 2, characterized in that: in step S2(3), the temperature rise rate is 10-12 ℃/h.
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| GB1006002A (en) * | 1961-03-27 | 1965-09-29 | Schramm Lack & Farbenfab | Polyvinyl chloride coatings |
| 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 |
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| GB1006002A (en) * | 1961-03-27 | 1965-09-29 | Schramm Lack & Farbenfab | Polyvinyl chloride coatings |
| 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 |
| CN109705693A (en) * | 2018-11-16 | 2019-05-03 | 浙江航峰铁塔有限公司 | A kind of anti-corrosion method of hot galvanizing component |
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