CN112090713A - Method for processing inner wall coating of stainless steel pipe - Google Patents
Method for processing inner wall coating of stainless steel pipe Download PDFInfo
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- CN112090713A CN112090713A CN202010733311.4A CN202010733311A CN112090713A CN 112090713 A CN112090713 A CN 112090713A CN 202010733311 A CN202010733311 A CN 202010733311A CN 112090713 A CN112090713 A CN 112090713A
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- steel pipe
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/22—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 internal surfaces, e.g. of tubes
- B05D7/222—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 internal surfaces, e.g. of tubes of pipes
- B05D7/225—Coating inside the pipe
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B1/00—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
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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
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
- C23G1/08—Iron or steel
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2202/00—Metallic substrate
- B05D2202/10—Metallic substrate based on Fe
- B05D2202/15—Stainless steel
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2503/00—Polyurethanes
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- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
The invention provides a method for processing a coating on the inner wall of a stainless steel pipe, which belongs to the technical field of pipeline spraying and comprises the following steps: and (3) pickling the inner wall of the stainless steel pipe, and drying after pickling. And coating the adhesive on the inner wall of the stainless steel pipe, and forming an adhesive coating after the adhesive is dried. And spraying anticorrosive slurry on the surface of the bonding coating, and polishing the cured anticorrosive slurry to form the final anticorrosive coating. According to the processing method of the stainless steel pipe inner wall coating, the inner wall of the stainless steel pipe does not need to be polished, and even if the inner wall of the stainless steel pipe is uneven, the stainless steel pipe inner wall coating still can have strong bonding force. After the bonding coating is formed, the bonding force between the anticorrosive slurry sprayed on the bonding coating and the bonding coating is large, and the stability of the structure is protected. In this application, on the basis of having shortened the process flow, improved anticorrosive coating's structural stability through setting up adhesive coating, finally improved the quality of product.
Description
Technical Field
The invention belongs to the technical field of pipeline spraying, and particularly relates to a method for processing a coating on the inner wall of a stainless steel pipe.
Background
After centrifugal forming, the inner wall needs to be sprayed with anticorrosive slurry, so that an anticorrosive coating for isolating the medium from the inner wall of the pipeline is formed. Because the inner wall of the pipeline is uneven after centrifugal casting, a series of treatments are needed to be carried out on the inner wall before the anticorrosive slurry is sprayed, the whole production process is finally longer, and the cost is increased.
Disclosure of Invention
The invention aims to provide a method for processing a coating on the inner wall of a stainless steel pipe, and aims to solve the problem that the whole production process is long due to the fact that a series of treatments need to be carried out on the inner wall before anticorrosive slurry is sprayed.
In order to achieve the purpose, the invention adopts the technical scheme that: the method for processing the coating on the inner wall of the stainless steel pipe comprises the following steps:
pickling the inner wall of the stainless steel pipe, and drying after pickling;
coating an adhesive on the inner wall of the stainless steel pipe, and forming an adhesive coating after the adhesive is dried;
and spraying anticorrosive slurry on the surface of the bonding coating, and polishing the cured anticorrosive slurry to form the final anticorrosive coating.
As another embodiment of the present application, the pickling of the inner wall of the stainless steel pipe comprises:
and spraying a pickling solution to the inner wall of the stainless steel pipe, and recovering the pickling solution.
As another embodiment of the present application, before the step of spraying the pickling solution on the inner wall of the stainless steel pipe, the method further comprises:
and installing negative pressure shells at two ends of the stainless steel pipe, installing an acid washing pipe on the negative pressure shells, and starting a vacuum pump communicated with the negative pressure shells.
As another embodiment of the present application, the spraying of the pickling solution to the inner wall of the stainless steel pipe includes:
and driving the stainless steel pipe to rotate, and spraying the pickling solution to the inner wall of the stainless steel pipe through the pickling pipe.
As another embodiment of the present application, the performing of the drying process after the pickling includes:
drying the stainless steel pipe through the pickling pipe, and absorbing evaporated gas by the negative pressure shell;
and after drying is finished, taking down the pickling pipe and the negative pressure shell.
As another embodiment of the present application, the coating of the adhesive on the inner wall of the stainless steel pipe includes:
driving the stainless steel pipe to rotate, and spraying the adhesive on the inner wall of the stainless steel pipe;
and pressing a clamping groove for containing the anti-corrosion slurry on the surface of the sprayed adhesive.
As another embodiment of the present application, spraying an anticorrosive slurry on a surface of the bond coat includes:
spraying the anti-corrosion slurry on the surface of the bonding coating, and filling the clamping groove with the anti-corrosion slurry;
and scraping the anticorrosive slurry by a scraper.
As another embodiment of the present application, the adhesive and the anti-corrosive paste each include polyurethane therein.
As another embodiment of the present application, before the polishing the cured anti-corrosion slurry, the method further comprises:
and maintaining the anticorrosive slurry.
The method for processing the coating on the inner wall of the stainless steel pipe has the beneficial effects that: compared with the prior art, the processing method for the inner wall coating of the stainless steel pipe carries out acid cleaning on the inner wall of the stainless steel pipe, and carries out drying treatment after the acid cleaning is finished. And coating the adhesive on the inner wall of the stainless steel pipe, and forming an adhesive coating after the adhesive is dried. And spraying anticorrosive slurry on the surface of the bonding coating, and polishing the cured anticorrosive slurry to form the final anticorrosive coating. During production, the stainless steel pipe is coated with the adhesive after being subjected to acid washing and drying, the adhesive is attached to the inner wall of the stainless steel pipe, the inner wall of the stainless steel pipe does not need to be polished, and strong adhesive force can be still ensured even if the inner wall of the stainless steel pipe is uneven. After the bonding coating is formed, the bonding force between the anticorrosive slurry sprayed on the bonding coating and the bonding coating is large, and the stability of the structure is protected. In this application, on the basis of having shortened the process flow, improved anticorrosive coating's structural stability through setting up adhesive coating, finally improved the quality of product.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a flow chart of a method for processing a coating on the inner wall of a stainless steel pipe according to an embodiment of the present invention;
FIG. 2 is a schematic connection diagram of the negative pressure housing and the connection pipe according to the embodiment of the present invention;
fig. 3 is a schematic structural diagram of a negative pressure housing according to an embodiment of the present invention.
In the figure: 1. a stainless steel tube; 2. pickling the tube; 3. a communication port; 4. a connecting pipe; 5. a negative pressure housing; 6. and a negative pressure port.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, a method for coating an inner wall of a stainless steel pipe according to the present invention will now be described. The processing method of the coating on the inner wall of the stainless steel pipe comprises the following steps:
the inner wall of the stainless steel pipe 1 is pickled, and after pickling, drying treatment is performed.
And coating the adhesive on the inner wall of the stainless steel pipe 1, and forming an adhesive coating after the adhesive is dried.
And spraying anticorrosive slurry on the surface of the bonding coating, and polishing the cured anticorrosive slurry to form the final anticorrosive coating.
The method for processing the coating on the inner wall of the stainless steel pipe has the beneficial effects that: compared with the prior art, the method for processing the coating on the inner wall of the stainless steel pipe carries out acid cleaning on the inner wall of the stainless steel pipe 1, and carries out drying treatment after the acid cleaning. And coating the adhesive on the inner wall of the stainless steel pipe 1, and forming an adhesive coating after the adhesive is dried. And spraying anticorrosive slurry on the surface of the bonding coating, and polishing the cured anticorrosive slurry to form the final anticorrosive coating. During production, the stainless steel pipe 1 is subjected to acid washing and drying, then the adhesive is coated, the adhesive is attached to the inner wall of the stainless steel pipe 1, the inner wall of the stainless steel pipe 1 does not need to be polished, and even if the inner wall of the stainless steel pipe 1 is uneven, the strong adhesive force can still be ensured. After the bonding coating is formed, the bonding force between the anticorrosive slurry sprayed on the bonding coating and the bonding coating is large, and the stability of the structure is protected. In this application, on the basis of having shortened the process flow, improved anticorrosive coating's structural stability through setting up adhesive coating, finally improved the quality of product.
As a specific embodiment of the method for processing a coating layer on an inner wall of a stainless steel pipe according to the present invention, the step of pickling an inner wall of a stainless steel pipe 1 comprises:
the pickling solution is sprayed onto the inner wall of the stainless steel pipe 1 and recovered.
In this application, it is necessary to remove impurities on the inner wall of the stainless steel pipe 1 before spraying the adhesive on the inner wall of the stainless steel pipe 1. The method has the problems that after the stainless steel pipe 1 is completely immersed, the inner wall and the outer wall of the stainless steel pipe 1 are both subjected to acid cleaning, but after the acid cleaning is finished, only the inner wall or the outer wall of the stainless steel pipe 1 can be subjected to subsequent treatment due to the limitation of processes and the like, and the spraying on the inner wall and the outer wall of the stainless steel pipe 1 cannot be carried out simultaneously. In the actual production of the engineering, taking spraying cement mortar on the inner wall of the stainless steel pipe 1 as an example, before spraying the cement mortar, processing steps such as polishing, water pressure testing and the like need to be carried out. After the cement coating treatment is completed, the outer wall of the stainless steel pipe 1 is exposed to the air all the time, so that the outer wall is rusted. When the outer wall of the stainless steel pipe 1 needs to be sprayed with the anticorrosive coating, the outer wall needs to be subjected to shot blasting and other treatments so as to improve the bonding force with the outer wall of the stainless steel pipe 1, namely, although the outer wall is subjected to acid washing before, the outer wall still needs to be subjected to pretreatment before spraying, so that the whole stainless steel pipe 1 is immersed in an acid washing tank for acid washing, so that great resource waste is generated, and the production cost is increased.
In this application, need carry out the pickling to stainless steel pipe 1's inner wall before spraying the bonding agent, directly spray the pickle on stainless steel pipe 1's inner wall during the pickling, at first compare in with stainless steel pipe 1 submergence in the pickle, spray the pickle and can more effectively get rid of the impurity on the inner wall on stainless steel pipe 1, have stronger scouring action to the impurity that bonds on the inner wall, simultaneously in order to guarantee the effect of pickling, during traditional submergence formula pickling, need to stand stainless steel pipe 1 a period of time in the pickle, it is longer to lead to the required time of whole production, and the mode that adopts to spray only needs to spray the week along the circumference of stainless steel pipe 1 inner wall and can have good pickling effect, the time of pickling has been shortened. In this application, including compositions such as sulphuric acid and nitric acid in the pickle, because nitric acid itself has certain volatility, the pickle sprays inevitable sputtering all around behind stainless steel pipe 1 inner wall simultaneously, and in order to guarantee the security during production, retrieve the pickle at the both ends of stainless steel pipe 1, can adopt the mode that the negative pressure was absorb, prevent that the pickle from overflowing in stainless steel pipe 1.
Referring to fig. 2 and 3, a method for processing a coating on an inner wall of a stainless steel pipe according to an embodiment of the present invention further includes, before spraying a pickling solution on the inner wall of the stainless steel pipe 1:
installing negative pressure shells 5 at two ends of the stainless steel pipe 1, installing the pickling pipe 2 on the negative pressure shells 5, and starting a vacuum pump communicated with the negative pressure shells 5.
In the present application, in order to uniformly pickle the inner wall of the stainless steel pipe 1 in the circumferential direction, the stainless steel pipe 1 is first placed on a driving roller, and the driving roller drives the stainless steel pipe 1 to rotate. The pickling pipe 2 sprays the pickling solution in a specific direction, and the inner wall of the stainless steel pipe 1 can be completely pickled finally. In order to effectively recover pickling solution, negative pressure shells 5 are installed at two ends of a stainless steel pipe 1, a negative pressure cavity is formed in each negative pressure shell 5, a plurality of negative pressure ports 6 communicated with the negative pressure cavities are formed in the circumferential direction of each negative pressure shell 5, the negative pressure shells 5 are communicated with a vacuum pump, and the vacuum pump is communicated with the negative pressure cavities and used for enabling the negative pressure ports 6 to generate negative pressure. Be provided with the fixing base in the both sides of drive roller, the uncovered setting in top of fixing base, the other end intercommunication of fixing base has the vacuum pump, places nonrust steel pipe 1 back on the drive roller, installs connecting pipe 4 on the fixing base, starts the vacuum pump, and a plurality of negative pressure mouths 6 absorb the gas in nonrust steel pipe 1 under the effect of vacuum pump. When the stainless steel pipe 1 is pickled, the driving roller drives the stainless steel pipe 1 to rotate at a certain speed, and the pickling solution sprayed on the inner wall of the stainless steel pipe 1 is scattered into water mist and finally absorbed by the negative pressure port 6.
In this application, set up a plurality of intercommunication mouths 3 on the negative pressure casing 5, intercommunication mouth 3 and negative pressure chamber intercommunication, connecting pipe 4 sets up between negative pressure casing 5 and vacuum pump, and 4 one ends of connecting pipe communicate with the fixing base, and the other end communicates with a plurality of negative pressure mouths 6 of negative pressure casing 5. The gas absorbed by the negative pressure port 6 enters the fixed seat through the negative pressure cavity, the communication port 3 and the connecting pipe 4. The connecting pipe 4 is arranged avoiding the pickling pipe 2. The fixing base is arranged on the base in a sliding mode, the driving roller is also arranged on the base, and the connecting pipe 4 is in plug-in fit with the fixing base and is in closed connection with the fixing base. The connecting pipe 4 can be taken out from the upper part of the fixed seat, when acid washing is needed, the connecting pipe 4 is firstly fixed on the negative pressure shell 5, then the connecting pipe 4 is installed on the fixed seat, the fixed seat drives the connecting pipe 4 to move together with the negative pressure shell 5, and the negative pressure shell 5 extends into the stainless steel pipe 1.
Referring to fig. 3, as a specific embodiment of the method for processing the coating on the inner wall of the stainless steel pipe 1, the step of spraying the pickling solution on the inner wall of the stainless steel pipe includes:
the stainless steel pipe 1 is driven to rotate, and the pickling solution is sprayed to the inner wall of the stainless steel pipe 1 through the pickling pipe 2.
In this application, in order to carry out abundant and even pickling to the inner wall of stainless steel pipe 1, at first be provided with the pickling pipe 2 with the corresponding length of stainless steel pipe 1, evenly seted up a plurality of outage along pickling pipe 2 length direction, the pickle is discharged and is sprayed on the inner wall of stainless steel pipe 1 by a plurality of outage under the effect of certain pressure. The locating hole has all been seted up at the middle part of two negative pressure casings 5, and the one end intercommunication of pickling pipe 2 has the delivery pump, and the other end is closed mouthful and is set up, and the delivery pump is used for carrying the pickle in the pickling jar to pickling pipe 2. When the pickling device is used, the pickling pipe 2 is arranged in the two positioning holes of the two negative pressure shells 5 in a penetrating mode, the end face of each negative pressure shell 5 is located inside the stainless steel pipe 1, the negative pressure port 6 faces the inner wall of the stainless steel pipe 1, the distance between the negative pressure port 6 and the inner wall of the stainless steel pipe 1 is small, and the distance between the negative pressure port 6 and the inner wall of the stainless steel pipe 1 ranges from 3 mm to 6mm according to the inner diameter of the stainless steel pipe 1. The nozzle can be arranged at the liquid discharge hole, thereby increasing the pressure when the pickling solution is discharged. When the pickling device is used, the vacuum pump is started, the driving roller is started to enable the stainless steel pipe 1 to rotate at a certain speed, and pickling liquid with a certain pressure is conveyed into the pickling pipe 2, so that the pickling process of the inner wall of the stainless steel pipe 1 is completed.
As a specific embodiment of the method for processing the coating on the inner wall of the stainless steel pipe provided by the present invention, the drying treatment after the completion of the pickling comprises:
drying the stainless steel pipe 1 through the acid washing pipe 2, and absorbing evaporated gas by the negative pressure shell 5;
and after drying is finished, taking down the pickling pipe 2 and the negative pressure shell 5.
In this application, spray the pickle through pickling pipe 2 in nonrust steel pipe 1, after the pickling is accomplished, in order to dry nonrust steel pipe 1 as early as possible, avoid because long-time placing, moisture in the pickle makes nonrust steel pipe 1 rust once more, can accomplish the back at the pickling, to carrying the air after the heating or the argon gas of pure high temperature in pickling pipe 2, the pickle is the evaporation with higher speed under the air effect of heating. The connecting pipe 4 is installed on the fixing seat. The pickling pipe 2 is respectively communicated with the delivery pump and the gas pipe, and valves are respectively arranged on the delivery pump and the gas pipe. When acid cleaning is needed, the valve on the gas pipe is closed, and the valve on the delivery pump is opened. When the stainless steel pipe 1 needs to be dried, the valve on the delivery pump is closed, and the valve on the gas delivery pipe is opened. When the heated gas is fed into the stainless steel pipe 1, the vacuum pump communicating with the negative pressure casing 5 is opened to recover the gas.
As a specific embodiment of the method for coating the inner wall of the stainless steel pipe according to the present invention, the step of coating the inner wall of the stainless steel pipe 1 with an adhesive includes:
the stainless steel pipe 1 is driven to rotate, and the adhesive is sprayed on the inner wall of the stainless steel pipe 1.
And pressing a clamping groove for containing the anti-corrosion slurry on the surface of the sprayed adhesive.
In the application, after the inner wall of the stainless steel pipe 1 is subjected to acid washing and dried, an adhesive needs to be sprayed on the inner wall of the stainless steel pipe 1, and the adhesive is used as a transition agent for connecting the inner wall of the stainless steel pipe 1 and the anticorrosive slurry. In the prior art, the anticorrosion slurry needs to be directly sprayed on the inner wall of the stainless steel pipe 1, and due to the difference of materials and the anticorrosion requirement of the slurry, the adhesive force between the inner wall and the anticorrosion slurry is small, so that the anticorrosion slurry cannot be applied to severe environments. In the application, the anticorrosive slurry is directly attached to the adhesive coating, and the adhesive coating is attached to the inner wall of the stainless steel pipe 1 after the pickling, so that the thickness of the anticorrosive slurry can be properly reduced because the adhesive coating enhances the adhesive force with the anticorrosive slurry even if the adhesive coating has a certain thickness. More importantly, the inner wall of the stainless steel pipe 1 does not need to be polished and the like after the stainless steel pipe 1 is formed and before the adhesive is coated, and compared with a smooth surface, the uneven inner wall of the stainless steel pipe 1 can increase the reliability of connection with the adhesive coating. The accessible cloth dolly is followed the axis motion of stainless steel pipe 1 to drive stainless steel pipe 1 when the cloth dolly motion and rotate, make the binder of following the cloth dolly exhaust can evenly cover on the inner wall of stainless steel pipe 1.
In this application, in order to further improve the joining force between anticorrosive thick liquids and the adhesive coating, the stability of protection anticorrosive coating self structure when the cloth dolly carries the adhesive in to stainless steel pipe 1, can use tools such as clamp plate, extrudes the draw-in groove on the adhesive. A plurality of protruding plates are arranged along the length direction of the pressing plate and used for extruding the adhesive to form clamping grooves. Be provided with the support in the both sides of drive roller, place the clamp plate on two supports when production, a plurality of protruding boards and adhesive contact extrude the draw-in groove, and the aim at that sets up the draw-in groove makes anticorrosive thick liquids fill up in the draw-in groove, treats anticorrosive thick liquids solidification back, forms the stereoplasm coating of joint in the draw-in groove to avoided the relative dislocation between anticorrosive coating and the bond coating to a certain extent, guaranteed nonrust steel pipe 1's life.
As a specific embodiment of the method for processing the inner wall coating of the stainless steel pipe provided by the present invention, the spraying of the anticorrosive slurry on the surface of the bond coating comprises:
and spraying the anticorrosive slurry on the surface of the bonding coating, and filling the clamping groove with the anticorrosive slurry.
And scraping the anticorrosive slurry by a scraper.
In this application, form the draw-in groove on the adhesive coating that finally forms to rotate through drive stainless steel pipe 1 when the pouring, the clamp plate can be with the adhesive compaction when stainless steel pipe 1 rotates, prevents to appear the cavity. When the anticorrosive slurry is sprayed, the stainless steel pipe 1 is still driven to rotate. In order to reduce the resistance to the flow of the medium in the stainless steel pipe 1, it is necessary to perform polishing after the anticorrosive coating is formed. The cured anticorrosive coating has higher hardness, and if the unevenness of the inner wall of the cured anticorrosive coating is higher, the polishing difficulty is higher, and the anticorrosive coating is easy to damage, so that cracks are generated on the surface of the anticorrosive coating. In order to reduce the degree of difficulty of follow-up processing, at first place the clamp plate on the support of drive roller both sides when coating the adhesive, when spraying anticorrosive thick liquids, through devices such as spray gun with anticorrosive thick liquids spraying on the bond coat, in order to guarantee the roughness of the anticorrosive coating of final formation, take out the clamp plate from the support, then place the scraper, the axial setting of stainless steel pipe 1 is followed to the scraper, the lower edge of scraper is used for contacting with anticorrosive thick liquids, make anticorrosive thick liquids can evenly cover the bond coat through the scraper, and can guarantee the roughness of the anticorrosive coating that forms through the scraper.
In a specific embodiment of the method for processing the coating on the inner wall of the stainless steel pipe, the adhesive and the anticorrosive slurry both comprise polyurethane. The bond coat self bonds on stainless steel pipe 1's inner wall, contains polyurethane in adhesive and anticorrosive thick liquids in this application, because the component is the same, is convenient for improve the adhesive force between final bond coat and the anticorrosive coating, has guaranteed the life of product.
As a specific embodiment of the method for processing the coating on the inner wall of the stainless steel pipe provided by the invention, the method further comprises the following steps of:
and maintaining the anticorrosive slurry.
In this application, anticorrosive thick liquids are cement mortar for the example, before polishing the cement mortar after curing, need maintain it, to the specificity of concrete, can carry out steam curing to avoid producing the crackle on the anticorrosive coating when polishing.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. The processing method of the coating on the inner wall of the stainless steel pipe is characterized by comprising the following steps:
pickling the inner wall of the stainless steel pipe, and drying after pickling;
coating an adhesive on the inner wall of the stainless steel pipe, and forming an adhesive coating after the adhesive is dried;
and spraying anticorrosive slurry on the surface of the bonding coating, and polishing the cured anticorrosive slurry to form the final anticorrosive coating.
2. The method of processing an inner wall coating of a stainless steel pipe according to claim 1, wherein pickling the inner wall of the stainless steel pipe comprises:
and spraying a pickling solution to the inner wall of the stainless steel pipe, and recovering the pickling solution.
3. The method for processing a coating on the inner wall of a stainless steel pipe according to claim 2, further comprising, before spraying the pickling solution on the inner wall of the stainless steel pipe:
and installing negative pressure shells at two ends of the stainless steel pipe, installing an acid washing pipe on the negative pressure shells, and starting a vacuum pump communicated with the negative pressure shells.
4. The method of processing a stainless steel pipe inner wall coating according to claim 3, wherein the step of spraying the pickling solution on the inner wall of the stainless steel pipe comprises:
and driving the stainless steel pipe to rotate, and spraying the pickling solution to the inner wall of the stainless steel pipe through the pickling pipe.
5. The method for processing the coating on the inner wall of the stainless steel pipe according to claim 3, wherein the drying treatment after the completion of the pickling comprises:
drying the stainless steel pipe through the pickling pipe, and absorbing evaporated gas by the negative pressure shell;
and after drying is finished, taking down the pickling pipe and the negative pressure shell.
6. The method of claim 1, wherein the step of applying the adhesive to the inner wall of the stainless steel tube comprises:
driving the stainless steel pipe to rotate, and spraying the adhesive on the inner wall of the stainless steel pipe;
and pressing a clamping groove for containing the anti-corrosion slurry on the surface of the sprayed adhesive.
7. The method for processing the inner wall coating of the stainless steel pipe according to claim 6, wherein the step of spraying the corrosion-resistant slurry on the surface of the bond coating comprises the steps of:
spraying the anti-corrosion slurry on the surface of the bonding coating, and filling the clamping groove with the anti-corrosion slurry;
and scraping the anticorrosive slurry by a scraper.
8. The method of claim 1, wherein the adhesive and the anti-corrosive slurry comprise polyurethane.
9. The method for processing the coating on the inner wall of the stainless steel pipe according to claim 1, further comprising, before the polishing the cured corrosion-resistant slurry:
and maintaining the anticorrosive slurry.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113997023A (en) * | 2021-11-23 | 2022-02-01 | 惠州深赛尔化工有限公司 | Processing method of anti-cracking and butanone-scrubbing-resistant industrial product storage tank |
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| CN113997023B (en) * | 2021-11-23 | 2023-02-17 | 惠州深赛尔化工有限公司 | Processing method of anti-cracking and butanone-scrubbing-resistant industrial product storage tank |
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