CN116037802B - Forming process for thin wall of special-shaped ring rib of chemical steel drum - Google Patents
Forming process for thin wall of special-shaped ring rib of chemical steel drum Download PDFInfo
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- CN116037802B CN116037802B CN202211702125.XA CN202211702125A CN116037802B CN 116037802 B CN116037802 B CN 116037802B CN 202211702125 A CN202211702125 A CN 202211702125A CN 116037802 B CN116037802 B CN 116037802B
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D51/00—Making hollow objects
- B21D51/16—Making hollow objects characterised by the use of the objects
- B21D51/18—Making hollow objects characterised by the use of the objects vessels, e.g. tubs, vats, tanks, sinks, or the like
- B21D51/20—Making hollow objects characterised by the use of the objects vessels, e.g. tubs, vats, tanks, sinks, or the like barrels
-
- 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
- B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
-
- 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
- B05D7/14—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
-
- 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
- B05D7/24—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 for applying particular liquids or other fluent materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D15/00—Corrugating tubes
- B21D15/04—Corrugating tubes transversely, e.g. helically
- B21D15/06—Corrugating tubes transversely, e.g. helically annularly
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
- B21D43/003—Positioning devices
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
-
- 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
-
- 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
-
- 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
Abstract
A process for forming a thin wall of a special-shaped ring rib of a chemical steel drum comprises the following steps: s1, forming a thin wall of the ring rib: adopting a rib expansion forming device to form a special-shaped ring rib thin wall inside the chemical steel drum; the rib expanding forming device comprises a rib expanding machine main body, a rib expanding mechanism is arranged at the top of the rib expanding machine main body, a lifting table is arranged at the bottom of the rib expanding mechanism, and a lifting mechanism is arranged between the rib expanding machine main body and the lifting table; placing the chemical steel drum at the center of the lifting table, and lifting the lifting table by the lifting mechanism to enable the rib expanding mechanism to be inserted into the chemical steel drum; s2, antiseptic treatment. The process for forming the special-shaped ring rib thin wall of the chemical steel drum is reasonable in process arrangement, the special-shaped ring rib thin wall forming is carried out on the inside of the chemical steel drum by adopting the expansion rib forming device, the supporting strength of the chemical steel drum is enhanced by the special-shaped ring rib, and then the special-shaped ring rib in the chemical steel drum and the inside of the chemical steel drum is subjected to corrosion prevention treatment, so that the service life of the chemical steel drum is prolonged.
Description
Technical Field
The invention belongs to the technical field of forming processes, and particularly relates to a thin-wall forming process for a special-shaped ring rib of a chemical steel drum.
Background
Steel drums are one of the conventional containers, and play an important role in the conventional containers, and the steel drums change from the functions of temporarily storing the contents to the industrial packaging, sales packaging, transportation packaging and the like of the present day, and form a continuous flow container from production to circulation and consumption, so that means for storing the contents for a long time are formed, and it can be said that the steel drums bring great changes and progress to the work and life of human beings.
In order to further strengthen the strength and the bearing capacity of the chemical steel drum, a method of arranging special-shaped ring ribs inside the chemical steel drum is often adopted. During operation, the worker speaks the chemical steel drum of rolled up the limit and places on the promotion bench, the elevating system promotes the promotion bench and makes the muscle mechanism that rises insert in the chemical steel drum, the muscle mechanism work that rises expands the extrusion of chemical steel drum section of thick bamboo wall outward and produces special-shaped ring muscle, simultaneously elevating system promotes the chemical steel drum part through the promotion bench in order to satisfy the deformation of chemical steel drum and the distance that shortens, and when placing the chemical steel drum on the promotion bench, need the workman to carry out manual regulation steel sheet position, make it be in central point, the workman has increased working strength many times manual regulation, the muscle working speed that rises of chemical steel drum has been reduced simultaneously.
In addition, the chemical steel drum is used for storing chemical products, so that the corrosion resistance of the chemical steel drum is also important to the chemical steel drum.
Therefore, the invention aims to develop a process for forming the special-shaped ring rib thin wall of the chemical steel drum, firstly, adopting a rib expansion forming device to form the special-shaped ring rib thin wall in the chemical steel drum, using mechanical movement to replace manual operation, improving the working efficiency, then carrying out anti-corrosion treatment on the chemical steel drum and the special-shaped ring rib in the chemical steel drum, providing an ideal isolation barrier for the chemical steel drum and the special-shaped ring rib and corrosive chemical liquid loaded in the chemical steel drum, and prolonging the service life of the chemical steel drum.
Disclosure of Invention
The invention aims to: in order to overcome the defects, the invention aims to provide the process for forming the special-shaped ring rib thin wall of the chemical steel drum, which is reasonable in process arrangement, adopts the expansion rib forming device to form the special-shaped ring rib thin wall in the chemical steel drum, strengthens the supporting strength of the chemical steel drum through the special-shaped ring rib, then performs anti-corrosion treatment on the chemical steel drum and the special-shaped ring rib in the chemical steel drum, improves the service life of the chemical steel drum, can be used for large-scale production, has better economy and wide application prospect.
The invention aims at realizing the following technical scheme:
a process for forming a thin wall of a special-shaped ring rib of a chemical steel drum comprises the following steps:
s1, forming a thin wall of the ring rib: adopting a rib expansion forming device to form a special-shaped ring rib thin wall inside the chemical steel drum; the rib expanding forming device comprises a rib expanding machine main body, a rib expanding mechanism is arranged at the top of the rib expanding machine main body, a lifting table is arranged at the bottom of the rib expanding mechanism, and a lifting mechanism is arranged between the rib expanding machine main body and the lifting table; placing the chemical steel drum at the center of the lifting table, lifting the lifting table by the lifting mechanism to enable the rib expanding mechanism to be inserted into the chemical steel drum, outwards expanding the wall of the chemical steel drum by the rib expanding mechanism until the special-shaped annular rib thin wall is formed, and then retracting the rib expanding mechanism and descending the lifting table by the lifting mechanism until the rib expanding mechanism exits the chemical steel drum;
s2, antiseptic treatment: and carrying out corrosion protection treatment on the special-shaped ring rib inside the chemical steel barrel.
According to the process for forming the special-shaped ring rib thin wall of the chemical steel drum, the special-shaped ring rib thin wall forming device is adopted to form the special-shaped ring rib thin wall inside the chemical steel drum, the supporting strength of the chemical steel drum is enhanced through the special-shaped ring rib, and then the special-shaped ring rib inside the chemical steel drum and the chemical steel drum is subjected to corrosion prevention treatment, so that an ideal isolation barrier is provided for the inside of the chemical steel drum and between the special-shaped ring rib and corrosive chemical liquid loaded in the chemical steel drum, and the service life of the chemical steel drum is prolonged.
Further, according to the chemical steel drum special-shaped ring rib thin-wall forming process, the limiting ring is arranged at the top of the lifting table, the pushing handle is arranged on one side of the limiting ring, and the centering mechanism is arranged inside the limiting ring.
The chemical steel barrel is placed inside the limiting ring, and then the pushing handle is pulled to drive the centering mechanism inside to work, so that the centering mechanism automatically pushes the chemical steel barrel to the center position.
Further, in the process for forming the special-shaped ring rib thin wall of the chemical steel drum, the centering mechanism comprises a splicing groove, a rotating ring is movably spliced in the splicing groove, and one end of the pushing handle is fixedly connected with one section of the middle of the rotating ring; the inside annular of swivel becket sets up 3 pieces placed in middle, the piece placed in middle sets up for the arc, the piece inside surface that placed in middle sets up the rubber block, piece one side fixedly connected with movable block placed in middle, movable block one side is provided with the impeller block, impeller block one side and the inboard fixed connection of swivel becket, movable block and impeller block one end are domatic setting, movable block and impeller block's domatic angle is the same, the impeller block top is provided with the connecting rod, connecting rod both ends and spliced groove inner wall fixed connection, connecting rod one side fixed connection a plurality of telescopic link, a plurality of the telescopic link surface has all cup jointed the return spring, return spring both ends respectively with piece and connecting rod fixed connection placed in middle, the piece tip is provided with stabilising arrangement placed in middle.
In the process of pulling the pushing handle, the rotating ring connected with the pushing handle moves in the inserting groove, and as one ends of the moving block and the pushing block are simultaneously slope surfaces, the corresponding moving block is extruded to move when the pushing block moves, and the moving block moves to drive the centering block to extend out of the inserting groove.
The rubber block on 3 centering block surfaces simultaneously moves and gradually contacts with the curled edge of the bottom of the chemical steel drum, the chemical steel drum is gradually pushed to the middle of the lifting table by centering blocks, the rubber block can prevent the centering blocks from scratching the surface of the chemical steel drum to cause barb-shaped bulges when the centering blocks are contacted with the chemical steel drum, when the centering blocks move, the telescopic rods are driven to gradually extend, the sleeved return springs are driven to stretch by the centering blocks, the return springs can provide power for automatic resetting of the centering blocks, and the plurality of telescopic rods can limit the moving direction of the centering blocks, so that the centering blocks translate without deflecting, and the centering blocks are prevented from inclining to squeeze and deform the chemical steel drum.
Further, according to the thin-wall forming process of the special-shaped ring rib of the chemical steel drum, the stabilizing device comprises the stabilizing block, the stabilizing block is movably inserted into the centering block, the top of the stabilizing block is fixedly connected with a plurality of stabilizing springs, and one ends of the stabilizing springs are fixedly connected with the centering block; the stabilizing block is arranged in an arc shape, and one side of the stabilizing block is arranged in a slope.
When the chemical steel drum is deformed by the rib expanding mechanism, the bottom curled edge of the chemical steel drum is positioned at the bottom of the stabilizing block and limited by the stabilizing block, and the phenomenon that the chemical steel drum is separated from the centering mechanism and excessively pushed to cause deformation to excessively produce defective products is avoided.
Further, the process for forming the thin wall of the special-shaped ring rib of the chemical steel drum comprises the following steps:
s1, preparing an anti-corrosion coating liquid: adding polytetrafluoroethylene micropowder into acetone, and stirring and mixing uniformly to obtain a component A; adding epoxy resin EP-12 into acetone, and stirring and mixing uniformly to obtain a component B; adding solid paraffin into chloroform, and stirring and mixing uniformly to obtain a component C; adding a curing agent into acetone, and uniformly stirring and mixing to obtain a component D; mixing the component A and the component B, and stirring for 10-20min to obtain a component E; mixing the component C and the component E, stirring for 15-25min, performing ultrasonic treatment at room temperature for 10-20min, and stirring for 5-15min to obtain component F; mixing the component F and the component D, and stirring for 3-6min to obtain an anti-corrosion coating liquid;
s2, spraying: and uniformly spraying the anti-corrosion coating liquid on the chemical steel drum and the special-shaped ring rib in the chemical steel drum by adopting a spraying device, and then curing for 10-15h at the temperature of 60 ℃.
The anticorrosive coating liquid is prepared by mixing polytetrafluoroethylene micro powder and paraffin into modified epoxy resin, and when the anticorrosive coating liquid is sprayed onto a chemical steel drum and special-shaped ring ribs inside the chemical steel drum to form a coating, the coating has super-hydrophobic surface, extremely strong chemical stability, mechanical stability and self-cleaning performance, can resist high-concentration salt solution, strong acid, strong alkali and high-strength mechanical damage, and the paraffin endows the coating with multiple self-repairing property and durability after repairing.
Further, in the process for forming the thin wall of the special-shaped ring rib of the chemical steel drum, 150-170g of polytetrafluoroethylene micro powder is added into every 1L of acetone; the component B is prepared by adding 380-420g of epoxy resin EP-12 into 1L of acetone; the component C is prepared by adding 10-15g of solid paraffin into 1L of chloroform; the component D is prepared by adding 130-150g of curing agent into 1L of acetone.
Further, in the process for forming the thin wall of the special-shaped ring rib of the chemical steel drum, the mass ratio of the component A to the component B to the component C to the component D in the anti-corrosion coating liquid is 115-125:15-25:110-120:15-25.
Further, according to the process for forming the thin wall of the special-shaped ring rib of the chemical steel drum, the preparation of the curing agent comprises the following steps: adding diethylenetriamine into water, and uniformly stirring and mixing to obtain a diethylenetriamine water solution; adding the heptafluorobutyric acid into water, and uniformly stirring and mixing to obtain a heptafluorobutyric acid aqueous solution; and (3) dropwise adding the aqueous solution of the heptafluorobutyric acid into the continuously stirred aqueous solution of the diethylenetriamine for carrying out fluorination reaction, heating to 100 ℃ after the dropwise addition of the aqueous solution of the heptafluorobutyric acid is finished, and evaporating all water to obtain the curing agent.
Further, according to the process for forming the thin wall of the special-shaped ring rib of the chemical steel drum, 100-110g of diethylenetriamine is added into every 1L of water; the aqueous solution of the heptafluorobutyric acid is prepared by adding 210-220g of the heptafluorobutyric acid into 1L of water; the mass ratio of the diethylenetriamine aqueous solution to the heptafluorobutyric acid aqueous solution is 10-12:11-13.
Compared with the prior art, the invention has the following beneficial effects:
(1) The process is reasonable in process setting, firstly, the inside of the chemical steel barrel is subjected to special-shaped ring rib thin-wall forming by adopting a rib expansion forming device, and the supporting strength of the chemical steel barrel is enhanced by the special-shaped ring rib; the chemical steel drum is placed in the limiting ring, and then the pushing handle is pulled to drive the centering mechanism to work, so that the chemical steel drum placed on the lifting table can be pushed and centered by the centering mechanism, the mechanical movement is utilized to replace manual operation, a worker does not need to manually adjust the chemical steel drum for many times to enable the chemical steel drum to be positioned in the center of the lifting table, the working intensity of the worker is effectively reduced, and meanwhile, the rib expanding working speed of the chemical steel drum is greatly improved; through being provided with stabilising arrangement, can be in the mechanism in the middle of chemical industry steel drum when rising the muscle, avoid breaking away from the mechanism in the middle because of its muscle deformation that rises, chemical industry steel drum can not be in the top of centering the piece and is excessively promoted and lead to deformation, and then avoid the defective products to produce;
(2) According to the process for forming the special-shaped ring rib thin wall of the chemical steel drum, the special-shaped ring rib in the chemical steel drum is subjected to corrosion prevention treatment, an ideal isolation barrier is provided for the chemical steel drum, the special-shaped ring rib and corrosive chemical liquid loaded in the chemical steel drum, the corrosion prevention coating liquid is prepared by mixing polytetrafluoroethylene micro powder and paraffin into modified epoxy resin, and when the corrosion prevention coating liquid is sprayed on the chemical steel drum and the special-shaped ring rib in the chemical steel drum to form a coating, the coating has a super-hydrophobic surface, has extremely strong chemical stability, mechanical stability and self-cleaning performance, can resist mechanical damage of high-concentration salt solution, strong acid, strong alkali and high strength, and the paraffin endows the coating with multiple self-repairing property and durability after repairing, so that the service life of the chemical steel drum is prolonged.
Drawings
FIG. 1 is a schematic diagram of the overall structure of an embodiment 1 of the process for forming the thin wall of the special-shaped ring rib of the chemical steel drum;
FIG. 2 is a front cross-sectional view of a stop collar in example 1 of the process for forming a thin wall of a profiled ring bar of a chemical steel ladle according to the invention;
FIG. 3 is an enlarged view of part A of FIG. 2 in example 1 of the process for forming the thin wall of the special-shaped ring rib of the chemical steel drum;
FIG. 4 is a top cross-sectional view of the stop collar in example 1 of the process for forming the profiled ring rib thin wall of the chemical steel ladle according to the invention;
FIG. 5 is an enlarged view of the portion B of FIG. 4 in example 1 of the process for forming the thin wall of the special-shaped ring rib of the chemical steel drum;
in the figure: 1. a rib expanding machine main body; 2. a rib expanding mechanism; 3. a lifting table; 4. a lifting mechanism; 5. a limiting ring; 6. pushing the handle; 7. a plug-in groove; 8. a rotating ring; 9. a centering block; 10. a moving block; 11. a pushing block; 12. a connecting rod; 13. a telescopic rod; 14. a return spring; 15. a stabilizing block; 16. stabilizing the spring.
Detailed Description
In the following, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with experimental data in example 1, comparative example 1 and example 2, and it is apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to fall within the scope of the invention.
Example 1
The special-shaped ring rib thin-wall forming process of the chemical steel drum comprises the following steps of: adopting a rib expansion forming device to form a special-shaped ring rib thin wall inside the chemical steel drum; the rib expanding forming device comprises a rib expanding machine main body 1, a rib expanding mechanism 2 is arranged at the top of the rib expanding machine main body 1, a lifting table 3 is arranged at the bottom of the rib expanding mechanism 2, and a lifting mechanism 4 is arranged between the rib expanding machine main body 1 and the lifting table 3; the chemical steel drum is placed at the center of the lifting table 3, the lifting mechanism 4 lifts the lifting table 3 to enable the rib expanding mechanism 2 to be inserted into the chemical steel drum, the rib expanding mechanism 2 expands outwards to extrude the wall of the chemical steel drum until the special-shaped ring rib thin wall is formed, then the rib expanding mechanism 2 retracts and the lifting mechanism 4 descends the lifting table 3 until the rib expanding mechanism 2 exits the chemical steel drum.
Wherein, place chemical industry steel drum in the spacing ring 5 of hoisting table 3 inside, alright pulling push handle 6 makes its rotatory ring 8 that drives the inside of jack-in groove 7 rotate afterwards, rotatory ring 8 rotates and drives three impeller block 11 and remove simultaneously, because movable block 10 and impeller block 11 one end are the domatic setting, impeller block 11 promotes movable block 10 and makes the centering piece 9 extend out from jack-in groove 7, the rubber block on 3 centering piece 9 surface removes simultaneously and progressively contacts with chemical industry steel drum bottom turn-up department, chemical industry steel drum is promoted to hoisting table 3 middle part gradually, in this process, telescopic link 13 that is in the shrink state extends and its surface cup joint's return spring 14 is stretched, and stabilizer block 15 is slope setting because of one side, stabilizer block 15 is pushed up and shrink entering centering piece 9 inside by chemical industry steel drum bottom turn-up department, the spring is compressed thereupon.
Comparative example 1
The material for manufacturing the chemical steel drum (Q235, 0.16% C, 0.52% Mn,0.26% Si, 0.03% S,0.02% P, and the balance Fe, calculated according to mass ratio) was cut into a plurality of square chips of 2.0 cm ×2.0 cm ×0.2 cm as comparative example 1.
Example 2
Square pieces of comparative example 1 were taken and first polished with 600 mesh SiC sandpaper until the surface was smooth and clean. Respectively carrying out ultrasonic washing with absolute ethyl alcohol and acetone after polishing, drying with nitrogen, and then carrying out anti-corrosion treatment, wherein the method comprises the following steps:
s1, preparing an anti-corrosion coating liquid: adding polytetrafluoroethylene micropowder into acetone, adding 160g of polytetrafluoroethylene micropowder into 1L of acetone, and stirring and mixing uniformly to obtain a component A; adding epoxy resin EP-12 into acetone, adding 405g of epoxy resin EP-12 into each 1L of acetone, and uniformly stirring and mixing to obtain a component B; adding solid paraffin into chloroform, adding 12g of solid paraffin into 1L of chloroform, and stirring and mixing uniformly to obtain a component C; adding a curing agent into acetone, adding 140g of the curing agent into each 1L of acetone, and uniformly stirring and mixing to obtain a component D; mixing the component A and the component B, wherein the mass ratio of the component A to the component B is 6:1, stirring for 15min to obtain an E component; mixing the component C and the component E, wherein the mass ratio of the component C to the component E is 6:7, stirring for 20min, then carrying out ultrasonic treatment at room temperature for 15min, and stirring for 10min to obtain an F component; mixing the component F and the component D in a mass ratio of 1:13, and stirring for 4min to obtain an anti-corrosion coating liquid;
s2, spraying: the anticorrosive coating liquid was uniformly sprayed to the square chips of comparative example 1 with a thickness of 300 μm using a spray coating device, and then cured at 60 ℃ for 12 hours.
Wherein, the preparation of the curing agent comprises the following contents: adding diethylenetriamine into water, adding 105g of diethylenetriamine into each 1L of water, and uniformly stirring and mixing to obtain a diethylenetriamine aqueous solution; adding the heptafluorobutyric acid into water, adding 213g of the heptafluorobutyric acid into 1L of water, and uniformly stirring and mixing to obtain a heptafluorobutyric acid aqueous solution; dropwise adding the aqueous solution of the heptafluorobutyric acid into the continuously stirred aqueous solution of the diethylenetriamine for carrying out fluorination reaction, wherein the mass ratio of the aqueous solution of the diethylenetriamine to the aqueous solution of the heptafluorobutyric acid is 23:25, after finishing dripping the aqueous solution of the heptafluorobutyric acid, heating to 100 ℃, and evaporating all water to obtain the curing agent.
Effect verification
The comparative example 1 and example 2 were tested as follows:
1. the contact angle was measured using a contact angle meter and the volume of the liquid was measured to be 6. Mu.L. The contact angle of comparative example 1 was 65 ° and the contact angle of example 2 was 168 °, so the coating layer on the surface of example 2 achieved a superhydrophobic effect. In addition, the adhesive tape was adhered to the surface of the coating of example 2, the adhesive tape was torn off after rolling twice with a weight of 100 g, the contact angle of example 2 was 160 ° after 10 tape peelings, and the contact angle of example 2 was 153 ° after 30 tape peelings, indicating excellent adhesion of the coating; the abrasion resistance of the coating was demonstrated to be excellent by placing the 200 g weight on 600 mesh sandpaper facing example 2, pushing example 2 forward along the straight edge for 10 cm and then pushing it backward for 10 cm, which is a friction test, and after 10 sandpaper abrasion, the contact angle of example 2 was 158 °, and after 30 sandpaper abrasion, the contact angle of example 2 was 152 °. Therefore, the coating is excellent in mechanical stability.
2. The contact angle was measured by a contact angle meter after the HCl solution of 1M (soak 7 d), naOH solution of 1M (soak 7 d) and NaCl solution of 3.5 wt% (soak 20 d), respectively, the example 2 was completely immersed in the solution, periodically removed, rinsed with water and dried, the contact angle was measured by a contact angle meter, the contact angle of example 2 was 168 ° before the soak, the contact angle of example 2 was 159 ° after the HCl solution of 1M was soaked 7 d, the contact angle of example 2 was 161 ° after the NaOH solution of 1M and the contact angle of example 2 was 158 ° after the dNaCl solution of 3.5 wt%, indicating very high stability of the coating in each corrosive liquid, the surface morphology of the coating of example 2 was not significantly changed after the soak by SEM test assistance, indicating that the coating of example 2 was resistant to strong acid and strong alkali and aqueous solutions due to chemical inertness of the surface composition.
3. Immersing example 2 in methylene blue dye aqueous solution for 5min, then taking out and observing, observing that the surface of the coating is clean and completely not wetted or polluted by the dye, and indicating that the coating has self-cleaning capability; after the coating of example 2 was cut out with a blade to form a plurality of grids, peeled off 10 times with an adhesive tape, soaked in an aqueous solution of methylene blue dye again for 5min, and then taken out for observation, the surface of the coating was observed to be clean, and the coating was still completely not wetted or polluted by the dye, indicating that the coating had self-cleaning capability.
4. Electrochemical performance tests were performed using a three electrode system with either comparative example 1 or example 2 as the working electrode, pt electrode and Saturated Calomel Electrode (SCE) as the auxiliary electrode and the reference electrode, respectively, with a corrosive medium of 3.5wt.% NaCl solution, and the test results are shown in table 1.
Table 1 results of Tafel polarization curve fitting for comparative example 1, example 2 immersed in 3.5wt.% NaCl solution for 1 day
From the above, the coating of example 2 has an efficiency of up to 99.71% protection of the internal Q235 portion, and excellent corrosion resistance.
There are many ways in which the invention may be practiced, and what has been described above is merely a preferred embodiment of the invention. It should be noted that the above examples are only for illustrating the present invention and are not intended to limit the scope of the present invention. It will be apparent to those skilled in the art that modifications may be made without departing from the principles of the invention, and such modifications are intended to be within the scope of the invention.
Claims (8)
1. A process for forming a thin wall of a special-shaped ring rib of a chemical steel drum is characterized by comprising the following steps:
s1, forming a thin wall of the ring rib: adopting a rib expansion forming device to form a special-shaped ring rib thin wall inside the chemical steel drum; the rib expanding forming device comprises a rib expanding machine main body (1), a rib expanding mechanism (2) is arranged at the top of the rib expanding machine main body (1), a lifting table (3) is arranged at the bottom of the rib expanding mechanism (2), and a lifting mechanism (4) is arranged between the rib expanding machine main body (1) and the lifting table (3); placing a chemical steel drum at the center of the lifting table (3), lifting the lifting table (3) by the lifting mechanism (4) to enable the rib expanding mechanism (2) to be inserted into the chemical steel drum, extruding and expanding the wall of the chemical steel drum by the rib expanding mechanism (2) outwards until the special-shaped ring rib thin wall is formed, retracting the rib expanding mechanism (2) and descending the lifting table (3) by the lifting mechanism (4) until the rib expanding mechanism (2) exits the chemical steel drum;
s2, antiseptic treatment: carrying out anti-corrosion treatment on the special-shaped ring rib in the chemical steel barrel;
s21, preparing an anti-corrosion coating liquid: adding polytetrafluoroethylene micropowder into acetone, and stirring and mixing uniformly to obtain a component A; adding epoxy resin EP-12 into acetone, and stirring and mixing uniformly to obtain a component B; adding solid paraffin into chloroform, and stirring and mixing uniformly to obtain a component C; adding a curing agent into acetone, and uniformly stirring and mixing to obtain a component D; mixing the component A and the component B, and stirring for 10-20min to obtain a component E; mixing the component C and the component E, stirring for 15-25min, performing ultrasonic treatment at room temperature for 10-20min, and stirring for 5-15min to obtain component F; mixing the component F and the component D, and stirring for 3-6min to obtain an anti-corrosion coating liquid;
s22, spraying: and uniformly spraying the anti-corrosion coating liquid on the chemical steel drum and the special-shaped ring rib in the chemical steel drum by adopting a spraying device, and then curing for 10-15h at the temperature of 60 ℃.
2. The process for forming the thin wall of the special-shaped ring rib of the chemical steel drum according to claim 1, wherein a limiting ring (5) is arranged at the top of the lifting table (3), a pushing handle (6) is arranged on one side of the limiting ring (5), and a centering mechanism is arranged inside the limiting ring (5).
3. The process for forming the thin wall of the special-shaped ring rib of the chemical steel drum according to claim 2, wherein the centering mechanism comprises a splicing groove (7), a rotating ring (8) is movably spliced in the splicing groove (7), and one end of the pushing handle (6) is fixedly connected with one section of the middle part of the rotating ring (8); the inside annular of swivel becket (8) sets up 3 piece (9) placed in middle, piece (9) placed in middle is the arc setting, piece (9) placed in middle medial surface sets up the rubber piece, piece (9) one side fixedly connected with movable block (10) placed in middle, movable block (10) one side is provided with promotes piece (11), promote piece (11) one side and the inboard fixed connection of swivel becket (8), movable block (10) and promote piece (11) one end to be domatic setting, the domatic angle of movable block (10) and promotion piece (11) is the same, promote piece (11) top to be provided with connecting rod (12), connecting rod (12) both ends and spliced groove (7) inner wall fixed connection, connecting rod (12) one side fixedly connected with telescopic link (13), a plurality of telescopic link (13) surface has all cup jointed answer spring (14), answer spring (14) both ends respectively with piece (9) and connecting rod (12) fixed connection placed in middle, it is provided with stabilising arrangement to place in middle piece (9) tip.
4. The process for forming the thin wall of the special-shaped ring rib of the chemical steel drum according to claim 3, wherein the stabilizing device comprises a stabilizing block (15), the stabilizing block (15) is movably inserted into the centering block (9), a plurality of stabilizing springs (16) are fixedly connected to the top of the stabilizing block (15), and one ends of the stabilizing springs (16) are fixedly connected with the centering block (9); the stabilizing block (15) is arranged in an arc shape, and one side of the stabilizing block (15) is arranged in a slope.
5. The process for forming the thin wall of the special-shaped ring rib of the chemical steel drum according to claim 1, wherein the component A is prepared by adding 150-170g of polytetrafluoroethylene micro powder into 1L of acetone; the component B is prepared by adding 380-420g of epoxy resin EP-12 into 1L of acetone; the component C is prepared by adding 10-15g of solid paraffin into 1L of chloroform; the component D is prepared by adding 130-150g of curing agent into 1L of acetone.
6. The process for forming the thin wall of the special-shaped ring rib of the chemical steel drum according to claim 1, wherein the mass ratio of the component A, the component B, the component C and the component D in the anti-corrosion coating liquid is 115-125:15-25:110-120:15-25.
7. The process for forming the thin wall of the special-shaped ring rib of the chemical steel drum according to claim 1, wherein the preparation of the curing agent comprises the following steps: adding diethylenetriamine into water, and uniformly stirring and mixing to obtain a diethylenetriamine water solution; adding the heptafluorobutyric acid into water, and uniformly stirring and mixing to obtain a heptafluorobutyric acid aqueous solution; and (3) dropwise adding the aqueous solution of the heptafluorobutyric acid into the continuously stirred aqueous solution of the diethylenetriamine for carrying out fluorination reaction, heating to 100 ℃ after the dropwise addition of the aqueous solution of the heptafluorobutyric acid is finished, and evaporating all water to obtain the curing agent.
8. The process for forming the thin wall of the special-shaped ring rib of the chemical steel drum, which is characterized in that the diethylenetriamine aqueous solution is prepared by adding 100-110g of diethylenetriamine into 1L of water; the aqueous solution of the heptafluorobutyric acid is prepared by adding 210-220g of the heptafluorobutyric acid into 1L of water; the mass ratio of the diethylenetriamine aqueous solution to the heptafluorobutyric acid aqueous solution is 10-12:11-13.
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