27 results about "Rust converter" patented technology

The invention provides an acrylic acid composite rust converting agent of organic acid modified aluminum triphosphate. The acrylic acid composite rust converting agent comprises an acrylic emulsion component A, an organic acid component B and an aluminum triphosphate component C, wherein the component A is prepared by mixing an acrylic emulsion, a coalescing agent and deionized water according to the mass ratio of (5-15): (0.3-0.5): (6-12); and the component B is prepared from ethanol, deionized water, isopropanol, ethylene glycol and organic acid according to a mass ratio of (5-10): (5-10): (0.1-1): (0.1-0.5): (3-6). And the component C is aluminum triphosphate powder. Wherein the component A, the component B and the component C are added according to the mass ratio of (10-30): (8-25): (0.2-5). According to the invention, rusted Q235 carbon steel is taken as a test object, which proves that the composite rust transforming agent has excellent rust transforming performance, can effectively treat corrosion traces on the surface of the Q235 carbon steel, and is of great significance to subsequent protection of a metal substrate.

The invention discloses a rust removal device. The rust removal device comprises a driving assembly, a spray head assembly, a camera assembly and a control device; the nozzle assembly is arranged on the driving assembly; the control device is used for controlling the nozzle assembly and the driving assembly, the driving assembly is used for enabling the nozzle assembly to reach a preset position, and the nozzle assembly is used for outputting a rust transforming agent when reaching the preset position; the camera shooting assembly is arranged on the driving assembly and moves along with the spray head assembly, the camera shooting assembly is used for shooting a corrosion area, and the control device is used for obtaining a corrosion area image captured by the camera shooting assembly. The driving assembly is arranged so that the spray head assembly can reach a high position, remote operation is achieved in cooperation with the camera shooting assembly and the control device, the spray head assembly can easily cover the high position and an area difficult to touch without climbing a ladder, meanwhile, the spray head assembly outputs an iron rust transforming agent, and the iron rust transforming agent has the grinding-free characteristic; and rust can be directly converted into paint, so that the working efficiency is greatly improved.

The invention relates to the field of anti-corrosion coatings, in particular to an epoxy anti-corrosion coating capable of being coated with rust and a preparation method of the epoxy anti-corrosion coating, and solves the problems that a paint film is weak in impact resistance and difficult to resist corrosion for a long time due to the fact that solid nano-particles are difficult to disperse into the rust in the permeation and combination process of the coating and the rust. According to the technical scheme, the adhesive comprises an epoxy component A and a curing component B, wherein the epoxy component A is prepared from the following components in parts by weight: 30 to 50 parts of epoxy resin, 10 to 15 parts of modified nano filler, 1 to 2 parts of migration enhancer, 6 to 8 parts of diluent and 8 to 12 parts of fumaric acid; wherein the curing component B is prepared from the following components in parts by weight: 20 to 30 parts of ethyl acetate, 3 to 8 parts of rust transforming agent, 2 to 5 parts of surfactant and 5 to 10 parts of penetrant. According to the method, the migration capability of nano solid particles between rust layers can be realized, and the combination degree and quantity of the nano solid particles and the rust layers are increased, so that more uniform firm hard particles are formed, and the impact resistance and corrosion resistance of the coating are enhanced.

This invention discloses an anti-corrosion coating for steel structures in coastal areas, comprising an epoxy zinc-rich primer layer, an epoxy micaceous iron oxide intermediate paint layer, and a fluorocarbon topcoat layer. The invention also includes a construction process for this anti-corrosion coating on steel structures in coastal areas, comprising the following steps: Step 1, pretreatment of the steel structure surface; Step 2, application of the epoxy zinc-rich primer; Step 3, application of the epoxy micaceous iron oxide intermediate paint; Step 4, application of the fluorocarbon topcoat; Step 5, finished product inspection and touch-up coating. This invention utilizes a three-layer composite anti-corrosion coating system consisting of an epoxy zinc-rich primer, an epoxy micaceous iron oxide intermediate paint, and a fluorocarbon topcoat. By introducing a water-based rust converter to optimize the surface pretreatment process, and combining precise control of key processes such as layered coating and curing, the adhesion between the coating and the steel structure substrate and the overall anti-corrosion durability are significantly improved. It exhibits excellent anti-corrosion performance and is suitable for anti-corrosion treatment of coastal steel structures such as port terminals, cross-sea bridges, and offshore platforms.

The invention relates to a steel rust-free coating maintenance material and a preparation method thereof, and belongs to the technical field of steel corrosion prevention, and the steel rust-free coating maintenance material is prepared by selecting inorganic modified water-based resin as a main raw material, adding a plurality of antirust materials, auxiliary materials and water, and mixing and stirring. The water-based paint is prepared from the following components in parts by weight: 30 to 50 parts of inorganic modified water-based resin, 1.0 to 6.0 parts of rust transforming agent, 1.0 to 5.0 parts of carbon nanotube, 5.0 to 10 parts of aluminum triphosphate, 5.0 to 15 parts of filler, 0.2 to 0.6 part of rheological additive, 0.2 to 0.5 part of defoaming agent, 1.0 to 2.0 parts of coalescing agent and 20 to 30 parts of water. According to the product, rust conversion can be efficiently achieved, the converted material can be used as filler, a firm protective coating is formed on the surface of a steel structure, and the purpose of long-acting corrosion prevention is achieved by combining the rust conversion pigment and the passivator in the protective coating; the heavy anti-corrosion requirement of renovation and maintenance in the fields of bridges, electric power iron towers, large steel structure buildings and the like is met, the purpose of saving manpower and materials is achieved, and the protection effect and safety are improved.

The invention provides a preparation method and application of an adhesive. A part of hydroxyl groups of tannic acid are subjected to acyl chloride esterification and then grafted with triethylene tetramine, modified tannic acid is prepared as a rust conversion agent, and the surface of nano iron powder is coated with the modified tannic acid to prepare the magnetic response material. When the material is added into an epoxy adhesive system, a rust layer can be derusted while bonding is carried out under the action of a magnetic field, a polyamine chain segment in the modified tannic acid can also participate in an epoxy curing reaction, and the interface crosslinking strength is improved. The adhesive prepared by the method is simple and convenient to construct, and reliable bonding of iron-based materials can be realized without polishing and derusting. The invention also provides application of the adhesive prepared by the method.

The utility model discloses a convenient-to-clean stirring blade structure in an iron rust transforming agent reaction kettle, and particularly relates to the technical field of stirring blades, the convenient-to-clean stirring blade structure comprises a hollow column, after the stirring blades and the hollow column are cleaned, one rectangular plate can be aligned with a through groove of the hollow column and is accurately inserted, and according to the same mode, the stirring blades and the hollow column can be separated from each other. The other rectangular plates are respectively inserted into the corresponding through grooves, after the insertion operation is completed, the double-end threaded rod is rotated, and then the two clamping plates are driven to move in opposite directions, so that a plurality of rectangular plates and the stirring blades are fixed at one time, the assembly of the stirring part is rapidly completed, preparations are made for the next stirring operation, and the mounting efficiency is improved; when the device needs to be cleaned, a double-end threaded rod is rotated to immediately drive two clamping plates to move back to back, so that a plurality of rectangular plates are not clamped, then the rectangular plates and stirring blades can be taken out from a through groove, the stirring blades and a hollow column can be conveniently and comprehensively cleaned, and the convenience and thoroughness of cleaning work are greatly improved.

The utility model discloses a rust transforming agent canning device, which relates to the technical field of rust transforming agents, and adopts the technical scheme that the rust transforming agent canning device comprises a positioning base, the positioning base is of a square structure, a supporting plate is fixedly connected to the top of the positioning base, a transforming agent raw material barrel and a filling mechanism are arranged on the front side of the supporting plate, and the filling mechanism is arranged on the rear side of the supporting plate. The filling mechanism is used for filling conversion agent raw materials, the conveying mechanism is arranged on the front side of the supporting plate, the conveying mechanism is used for sequentially conveying filling bottles, the filling mechanism comprises a positioning frame, and the positioning frame is arranged on the front side of the supporting plate; the rust transforming agent filling device has the advantages that the rust transforming agent filling efficiency is greatly improved, meanwhile, the design of the gear and the one-way bearing is adopted, the conveying belt does not rotate during filling, when the transforming agent is not filled, the conveying belt rotates to move filled products, meanwhile, filling bottles which are not filled are moved, and therefore the filling efficiency of the rust transforming agent is greatly improved. And the production efficiency is greatly improved.

The present invention relates to the field of anticorrosive coatings, specifically a kind of epoxy anticorrosive coating that can be coated with rust and preparation method thereof, solve coating and rust infiltration and bonding process, solid nanoparticles are difficult to disperse into rust, cause paint film impact resistance weak, be difficult to the problem of long-term corrosion resistance, technical scheme includes epoxy component A and curing component B, wherein epoxy component A is by weight by 30 50 parts of epoxy resin, 10 15 parts of modified nano filler, 1 2 parts of migration enhancer, 6 8 parts of diluent and 8 12 parts of fumaric acid composition;Wherein curing component B is by weight by 20 30 parts of ethyl acetate, 3 8 parts of rust converter, 2 5 parts of surfactant and 5 10 parts of penetrant composition.The present invention can realize the migration ability of nano solid particles between rust layers, increases the degree of combination and quantity of the two, thus forming more uniformly strong hard particles, enhances the impact resistance and corrosion resistance of coating.

The invention discloses a water-based on-rust coating containing high-entropy oxides and a preparation method and application thereof.The water-based on-rust coating containing the high-entropy oxides is characterized by being prepared from, by weight, 30-35 parts of water, 0.1-0.8 part of a rust conversion agent, 1-5 parts of auxiliaries, 40-45 parts of a film forming matter and 15-25 parts of filler, and the water-based on-rust coating containing the high-entropy oxides is prepared from, by weight, 30-35 parts of water, 0.1-0.8 part of a rust conversion agent, 1-5 parts of auxiliaries, 40-45 parts of a film forming matter and 15-25 parts of filler; wherein the filler comprises a high-entropy oxide, and the chemical formula of the high-entropy oxide is (Fe, Co, Ni, Cu, Zn) Cr2O4. By adding the high-entropy oxide, the corrosion resistance of the water-based on-rust coating is improved. The hysteresis diffusion effect of the high-entropy oxide can further hinder ion diffusion, and the corrosion resistance of the coating is improved.

The present application relates to the technical field of polyurea anticorrosive coating, and discloses a modified graphene oxide and polyurea anticorrosive coating composition and a method for preparing a polyurea anticorrosive coating. The modified graphene oxide is obtained by modifying graphene oxide with isocyanate silane. The polyurea anticorrosive coating composition contains polyurea anticorrosive coating component A and polyurea anticorrosive coating component B. The polyurea anticorrosive coating component A is prepared from raw materials containing aliphatic diisocyanate, aromatic diisocyanate, polyether polyol, bisphenol F type epoxy resin, stable rust converter, ester type viscosity reducer and modified graphene oxide. The polyurea anticorrosive coating component B is prepared from raw materials containing polyether polyamine, amino-terminated chain extender, light stabilizer hindered amine, ultraviolet absorber and silane coupling agent. The polyurea anticorrosive coating composition provided by the present application has strong adhesion between the coating and the metal substrate, and can improve the barrier corrosion resistance to corrosive media.

The utility model discloses a rust transforming agent quantitative filling device capable of flexibly adjusting filling quantity, which relates to the technical field of rust transforming agent processing, and adopts the technical scheme that the rust transforming agent quantitative filling device comprises a positioning base, a plurality of supporting legs fixedly connected to the bottom of the positioning base, a positioning ring fixedly connected to the top of the positioning base and two supporting frames, the two supporting frames are fixedly connected to the top of the positioning base, a reserved barrel is arranged at the top of the positioning base and fixedly connected between the two supporting frames, the adjusting mechanism is arranged in the reserved barrel and used for adjusting the quantity of the rust transforming agent needing to be filled, and the adjusting mechanism comprises two air bag balls. The rust transforming agent filling device has the advantages that the rust transforming agent filling efficiency is greatly improved, and meanwhile the structural design of the air bag balls and the lifting rod is adopted, so that the air bag balls float when the transforming agent is filled to a certain amount.

The utility model relates to the technical field of positioning brackets, in particular to a precise positioning filling machine for a rust transforming agent. The filling machine comprises a control machine body and a filling head, a positioning device is arranged on one side of the control machine body and comprises a bottom frame, the bottom end of the bottom frame is fixedly connected with the control machine body, a plurality of transmission rollers are rotatably connected to the inner side of the bottom frame, the transmission rollers are evenly distributed on the bottom frame, and the control machine body is fixedly connected with the positioning device. Two supporting plates are fixedly connected to the top end of the bottom frame, a first air cylinder is fixedly connected to the short arm end of each supporting plate, a fixing plate is fixedly connected to the output end of each first air cylinder, a second air cylinder is fixedly connected to the top end of each fixing plate, and a connecting plate is fixedly connected to the output end of each second air cylinder. The problems that according to a traditional iron rust transforming agent filling machine, a filling head cannot be accurately positioned above a container opening, liquid possibly flows out of a container, material waste is caused, and production equipment and the working environment are polluted are solved.

The utility model discloses a raw material mixing reaction kettle for producing a rust transforming agent, which relates to the technical field of reaction kettles, and adopts the technical scheme that the raw material mixing reaction kettle comprises a reaction kettle body, and a mixing mechanism is arranged in the reaction kettle body; the mixing mechanism comprises a rotating shaft, the bottom of the rotating shaft is fixedly provided with a spline shaft, the spline shaft is sleeved with a ball spline pair, the ball spline pair is sleeved with a spline sleeve, one side of the spline sleeve is fixedly provided with a connecting roller, and the spline sleeve is sleeved with a fixed sleeve; the raw material mixing reaction kettle for rust transforming agent production has the beneficial effects that the stirring rod and the stirring blades can longitudinally move while rotating, so that the stirring position is adjusted, and rust transforming agent raw materials at different depths in the reaction kettle can be stirred and mixed; the problem that the stirring shaft of the existing reaction kettle can only rotate in a fixed area, so that the bottom area of the reaction kettle is non-uniformly stirred is effectively solved, and the mixing effect is improved.

The utility model discloses an iron rust transforming agent blending box, which relates to the technical field of iron rust transforming agents, and adopts the technical scheme that the iron rust transforming agent blending box comprises a blending box body, the blending box body is of a cylindrical structure, a top plate and a stirring mechanism are arranged at the top of the blending box body, and the stirring mechanism is arranged in the blending box body; the stirring mechanism is used for stirring and mixing a mixed transforming agent, the feeding mechanism is arranged at the top of the top plate and used for feeding transforming agent raw materials, the stirring mechanism comprises a transmission motor, the transmission motor is arranged at the top of the top plate, and the output end of the transmission motor is fixedly connected with a transmission shaft; the rust transforming agent blending device has the advantages that the efficiency of blending a rust transforming agent is greatly improved, and meanwhile, the rust transforming agent blending device adopts the design of a plurality of discharge ports, so that transforming agent raw materials are uniformly discharged.

The utility model relates to the technical field of adjusting brackets, in particular to a rust transforming agent impurity removal device. The impurity removing device comprises an impurity removing box, an adjusting device is arranged outside the impurity removing box and comprises a fixing frame and a filter screen, the inner side of the fixing frame is fixedly connected with the impurity removing box, the top end of the fixing frame is fixedly connected with two electric telescopic rods, the output ends of the electric telescopic rods are fixedly connected with a connecting plate, and the connecting plate is fixedly connected with the filter screen. The bottom ends of the connecting plates are fixedly connected with U-shaped rods, one sides of the U-shaped rods are fixedly connected with concave plates, the inner sides of the two concave plates are matched with a filter screen, and the sides, close to each other, of the two connecting plates are fixedly connected with two square rods. The utility model discloses an iron rust transforming agent impurity removal device which solves the problem that a traditional iron rust transforming agent impurity removal device is low in filtering and impurity removal efficiency due to the fact that a filter screen is basically used for filtering and impurity removal in the iron rust transforming agent production process, but the filter screen is inconvenient to replace and clean.

The invention relates to a modular brush and ball-head bottle for viscous paints, watercolors, fabric paints, adhesives, oil, cleaners, rust converters, and other liquids, with a brush made of hair, with a tip with a cushioned ball, or with felt, fibers, or foam. In an automatic version (A), in an adapter (1) that is screwed onto the container (40), an internal thread (2) that is short relative to the screw version (B) is formed exclusively in the area of ​​the outer side (3) of the adapter (1). Between the short internal thread (2) in the adapter (1) and its integrally formed valve cone (4) is a normal, smooth area (9) without an internal thread (2), in which the likewise short external thread (22) of the brush sleeve (20) can be moved back and forth.

The utility model relates to the technical field of lifting supports, in particular to an efficient filtering device capable of rapidly switching filter screens and used for rust transforming agent production. The device comprises a shell, a lifting device is arranged outside the shell, the lifting device comprises two fixing plates and a filter screen body, the sides, close to each other, of the two fixing plates are fixedly connected with the shell, the top ends of the fixing plates are fixedly connected with an electric push rod, the output end of the electric push rod is fixedly connected with a connecting plate, and the connecting plate is fixedly connected with the lifting device. One side of the connecting plate is fixedly connected with two round rods, one ends of the four round rods are fixedly connected with a placing frame, and one side of the placing frame is fixedly connected with two T-shaped rods. The problems that a filter screen of a traditional efficient filtering device for producing the rust transforming agent cannot be replaced in time due to the fact that the filter screen is basically installed through bolts, frequent pause is caused due to the bottleneck of the filtering link in the production process, and the time needed for completing the same yield is greatly increased are solved.

The invention discloses a steel structure aqueous on-rust coating cathodic protection, self-repairing and self-cleaning anticorrosive paint, which comprises a component A and a component B. The component A comprises deionized water, aqueous fluorocarbon acrylic resin, tannic acid, nanometer aluminum triphosphate and a nanometer conductive polymer. The component B is prepared from ZnAl-based alloy powder, nano rutile type titanium dioxide and nano tricalcium aluminate. The coating disclosed by the invention adopts water as a solvent, does not contain volatile organic compounds, and is beneficial to environmental protection and health protection; the rust transforming agent in the paint can stabilize rust, prevent rust and coat with rust; the nano conductive polymer material enables the coating anticorrosive coating to have a self-repairing function; the ZnAl-based alloy powder not only can effectively play a long-term cathode protection role, but also can improve the shielding protection role of the coating; the nano rutile type titanium dioxide has the functions of self-cleaning and prolonging the anti-corrosion service life of the coating. The coating disclosed by the invention can provide safe, long-acting and convenient-to-construct anti-corrosion protection for a steel structure.

The utility model discloses a coating structure of rust removal and rust prevention paint. The coating structure comprises a metal base layer, a rust conversion layer, a primer layer and a finish layer, by means of the three-layer coating structure of the rust transforming agent, the primer layer and the finish paint layer, efficient protection on the metal surface is achieved. The rust conversion layer reacts with iron oxide in the rust to generate a stable complex or water-soluble iron salt, and the products can be firmly attached to the metal surface to form a protective film, so that the adhesive force and stability of the surface of a base material are enhanced, and further oxidation reaction is prevented; the primer layer provides excellent shielding performance and isolates the inner layer from an external corrosive medium; and the finishing coat layer is used as an outer protective barrier and has excellent weather resistance and wear resistance. The three layers of structures cooperate with one another, so that the service life of the metal material is effectively prolonged, and the corrosion resistance and the environmental adaptability are remarkably improved.

The application discloses a rust-converting hydrophobic weather-resistant paint and a preparation method and application thereof, and the rust-converting hydrophobic weather-resistant paint comprises the following components: a fluorinated polyacrylate emulsion grafted and modified by phosphoric acid and phytic acid, an inhibitor, a penetrating agent, an adhesion promoter and a filler. The fluorinated polyacrylate emulsion grafted and modified by phosphoric acid and phytic acid is used as a rust converter and a film former at the same time, chemical reactions and complexation are simultaneously carried out in the rust conversion process, the rust conversion product is integrated with the film forming material, the rust conversion product is completely converted, the internal crosslinking strength of the coating is high, long fluorine side chains are enriched on the surface of the coating, the coating has hydrophobic and weather-resistant properties, and the comprehensive corrosion resistance of the coating is excellent.

The invention discloses an iron rust transforming agent capable of being used for removing heavy rust. The iron rust transforming agent comprises the following raw materials in percentage by weight: 6-14% of a main transforming agent, 3-6% of an auxiliary transforming agent, 0.5-1.5% of a reinforcing agent, 2-4% of a thickening agent, 1-2% of a dispersing agent, 0.8-1.5% of a corrosion inhibitor, 0.3-0.7% of a rare earth passivating agent, 1-3% of an auxiliary agent and the balance of water, wherein the auxiliary transforming agent is a microcapsule prepared from a prepolymer of ammonium molybdate and tannic acid and a chitosan-pectin composite film. The rust transforming agent is used for solving the technical problems that the rust transforming agent is poor in deep heavy rust transforming effect, a film layer formed after transformation is weak in adhesive force and poor in corrosion resistance, and the long-term protection requirement is difficult to meet.

The utility model discloses a liquid oscillation mixing device for rust transforming agent processing, and particularly relates to the technical field of mixing devices.The liquid oscillation mixing device comprises a C-shaped plate I. A C-shaped plate II is slidably arranged between the two side walls of the C-shaped plate I. A motor II is started to drive a disc to rotate and further drive a cylinder to rotate, and then a long plate I and a mixing box are driven to move left and right; meanwhile, a first motor can be started to drive an eccentric wheel to rotate, then a mixing box is pushed to move upwards, then a first spring telescopic rod is stretched, the mixing box can oscillate up and down through the elastic force of the first spring telescopic rod, and through cooperation with previous left-right oscillation, the mixing effect is improved; vibration in the horizontal direction and vibration in the vertical direction are overlapped, liquid forms a three-dimensional spiral flowing track in the tank, the mixing effect is improved, an air cylinder is fixedly arranged at the top of the cover plate, a baffle is fixedly arranged at the telescopic end of the air cylinder, the baffle can conveniently shield a feeding port, and the liquid is prevented from being spilled out when the mixing box vibrates.

The invention discloses an anti-corrosion material for a railway station building canopy steel structure as well as a preparation method and a use method of the anti-corrosion material. The anti-corrosion material comprises the following components: polyurethane modified epoxy resin, fluorosilicone modified acrylic resin, nanoscale silicon dioxide, a rust transforming agent, a mixed solvent and a curing agent. The preparation method comprises the following steps: S1, adding nanoscale silicon dioxide into polyurethane modified epoxy resin, and performing ultrasonic treatment to obtain a dispersion; s2, adding fluorosilicone modified acrylic resin, a mixed solvent and a rust transforming agent into the dispersion in the step S1, and then stirring to ensure that all the components are mixed; and S3, adding a curing agent under the stirring action, and continuously stirring to obtain the anti-corrosion material. The anti-corrosion material disclosed by the invention has the effects of improving the thermal expansion and cold contraction resistance and improving the rusty coating performance.

The utility model relates to the technical field of stirring brackets, in particular to multi-dimensional stirring equipment for producing a rust transforming agent. The stirring device comprises a stirring barrel, a stirring device is arranged outside the stirring barrel, the stirring device comprises two mounting plates, the inner sides of the two mounting plates are fixedly connected with the stirring barrel, the sides, close to each other, of the two mounting plates are fixedly connected with a supporting plate, one side of the supporting plate is fixedly connected with a U-shaped supporting plate, and the U-shaped supporting plate is fixedly connected with the stirring barrel. An air cylinder is fixedly connected to one side of the U-shaped supporting plate, a connecting plate is fixedly connected to the output end of the air cylinder, a servo motor is fixedly connected to one side of the connecting plate, a rotating rod is fixedly connected to the output end of the servo motor, and a stirring rod is fixedly connected to one end of the rotating rod. The problems that traditional stirring equipment for producing the rust transforming agent can only perform simple one-dimensional stirring, and components are difficult to fully and uniformly mix in a whole reaction system are solved.

The utility model discloses a municipal well lid rust removal device which comprises a first transverse plate and a second transverse plate, the first transverse plate is fixedly arranged on the second transverse plate through a stand column, and a working groove is formed in the second transverse plate; a third transverse plate capable of ascending and descending is arranged between the first transverse plate and the second transverse plate, a brush disc matched with the working groove is arranged below the third transverse plate, and a rotating shaft at the upper end of the brush disc is connected with a first driving motor on the third transverse plate; an annular groove is formed in the upper surface of the brush disc, a first liquid outlet hole and a second liquid outlet hole which are matched with a water injection pipe at the lower end of the third transverse plate are formed in the annular groove, the first liquid outlet hole is communicated with a dispersion cavity in the brush disc, bristles are arranged at the lower end of the dispersion cavity, and the second liquid outlet hole penetrates through the brush disc. The municipal well lid rust removal device is practical in function and ingenious in design, and the problems that the working efficiency is low and time and labor are wasted due to the fact that rust transforming agents are sprayed on the surfaces of well lids manually are effectively solved.

This invention relates to a film-forming substance and its preparation method, as well as a fluoropolymer coating, its preparation method, and its application. The film-forming substance is a fluoropolymer; the fluoropolymer is poly(vinylidene fluoride-tetrafluoroethylene) (P(VDF-TFE)-OH) with active hydroxyl groups at the ends of its molecular chain. The fluoropolymer coating includes a rust-converting agent, a stabilizer, an organic solvent, a filler, a film-forming aid, and the film-forming substance. The beneficial effects of this invention are: it can produce a fluoropolymer coating that integrates top and bottom layers, providing excellent rust-resistant coating, good weather resistance, and a long effective protection period.