1396 results about "Metallic substrate" patented technology

The invention relates to a self-repairing anti-corrosion water-based paint applied to the field of paint compositions, which is prepared by the following steps: firstly, preparing a self-repairing microcapsule encapsulated with a self-repairing agent and a corrosion inhibitor, and then uniformly dispersing the self-repairing microcapsule into water-based base resin under a low-shear condition; the prepared coating can be applied to the surface of a pretreated metal base material in a brush coating, spray coating or blade coating mode and the like, a micron-sized anti-corrosion coating is formed after curing, under the normal condition, the microcapsules are placed in the coating in a standing mode and do not work, when scratches occur, the self-repairing microcapsules are broken and play a role, and the corrosion resistance of the coating is improved. The self-repairing agent rapidly fills and heals the damaged part of the coating to form a new barrier layer, the corrosion inhibitor forms a protective film on the exposed metal surface to inhibit the corrosion reaction, and the synergistic mechanism can effectively delay the corrosion diffusion of the scratched part, so that the protection integrity of the coating on the base material is maintained, and the service life of the coating is prolonged. And the coating can be suitable for metal structure protection in severe environments such as ocean climate, high-humidity and high-salt environments, acid rain regions, chemical environments and the like.

The invention relates to the field of metal surface treatment, and discloses a multi-layer vacuum coating method for enhancing the surface of a high-precision metal part, which comprises the following steps: S1, surface treatment: removing surface pollutants and oxide layers through plasma cleaning, and coarsening the surface of a base material through laser etching; s2, coating deposition is conducted, specifically, a metal transition layer and a multi-layer nano hard coating are deposited in an enhanced mode through plasma; s3, depositing a self-lubricating coating: depositing the self-lubricating coating by pulse laser; s4, post-treatment: carrying out ion beam assisted post-treatment; s5, heat treatment: performing low-temperature heat treatment to eliminate stress. Through the plasma enhanced PVD and pulse laser deposition technology, the multi-layer nano coating is deposited under the low-temperature condition, the problem of thermal deformation of a heat-sensitive metal base material caused by a traditional high-temperature process is solved, and it is ensured that the multi-layer coating with high hardness and high compactness can still be formed on the premise that the size precision of the base material is not affected; and therefore, the method can be widely applied to surface treatment of high-precision parts.

The invention relates to the field of metal surface treatment, and discloses an efficient electroplating process for a cotton picker spindle and an electroplating liquid formula, the efficient electroplating process comprises the following steps: step 1, substrate pretreatment: sequentially carrying out alkali washing, acid washing and plasma activation on the spindle; step 2, preparing an electroplating solution: dissolving nickel sulfate, sodium hypophosphite, a composite nano additive and a complexing agent in water, and adjusting the pH value to 4.8-5.3; step 3, gradient pulse electroplating: carrying out pulse electroplating in three stages, including bottom layer deposition, transition layer deposition and composite layer deposition; 4, post-treatment is conducted, specifically, silane sealing and curing are conducted on the plating layer; the base body pretreatment in the first step comprises the following sub-steps of alkali washing and oil removal, wherein the picking ingot is soaked in a NaOH solution with the concentration being 45-55 g / L. According to the method, high-density hydroxyl active sites are constructed on the surface of the metal base material through a plasma activation process, strong chemical bonding is formed between a plating layer and the base material, and the interface bonding strength is remarkably improved.

The invention relates to the technical field of wear-resistant composite materials, and particularly provides a modification method of ceramic particles, a ceramic-reinforced high-chromium iron-based composite material and a preparation method of the ceramic-reinforced high-chromium iron-based composite material, and the modification method comprises the following steps: carrying out decontamination, hydrofluoric acid coarsening, divalent tin sensitization, metal palladium activation, chemical Ni plating, ceramic micro powder coating and other treatments on SiC or ZTA and other ceramic particles; therefore, metallization modification can be rapidly achieved on the surfaces of the ceramic particles, decomposition of the ceramic particles is prevented, the connection strength between the ceramic particles and the metal-based material is effectively improved, and the ceramic reinforced high-chromium iron-based composite material with high hardness and high abrasion resistance is prepared. And technical support is provided for developing wear-resistant parts of mechanical equipment under harsh working conditions of metallurgy, mines, coal, building materials and the like.

Disclosed is a cooling system (104) and method for a metal processing system (100). The cooling system (104) includes a cooling header (114), an exhaust system (118), a temperature sensor (128), and a controller (130). The cooling header (114) selectively dispenses a coolant onto a metal substrate (110), and the exhaust system (118) removes heated coolant from the metal substrate (110). The temperature sensor (128) is downstream from the cooling header (114) and detects a temperature profile of the metal substrate (110) across a width of the metal substrate. The controller (130) is communicatively coupled to the cooling header (114) and the temperature sensor (128), and the controller (130) controls the cooling header (114) based at least on a detected temperature profile.

The invention belongs to the technical field of paint coatings, and particularly relates to a hydrophobic heat-conducting self-repairing coating and a preparation method thereof. The preparation method of the hydrophobic heat-conducting self-repairing coating comprises the following steps: ultrasonically dispersing a heat-conducting filler and polyethylene glycol in an organic solvent, dropwise adding into a water-borne epoxy resin solution, and stirring to obtain a heat-conducting coating solution; the method comprises the following steps: dropwise adding a liquid A containing polysiloxane and a fluorine-containing monomer into a liquid B containing polyethylene glycol, stirring, carrying out centrifugal suction filtration, and drying to obtain the self-repairing microcapsule. Then adding the self-repairing microcapsules and silicon dioxide into the fluorine-containing polymer solution and / or the hydrophobic resin solution, and carrying out ultrasonic dispersion to prepare a self-repairing hydrophobic coating solution; the heat-conducting coating liquid and the self-repairing hydrophobic coating liquid are uniformly sprayed or spin-coated on the surface of a metal base material in sequence and then are subjected to UV curing, and the hydrophobic heat-conducting self-repairing coating is prepared. According to the method, the process and raw materials are simple, and the prepared coating has heat conduction and self-repairing performance and is excellent in anti-aging performance.

The invention belongs to the technical field of welding, and discloses a laser welding device for metal matrix composite production, which comprises a welding table, supports are symmetrically arranged at the top of the welding table, a laser welding machine is arranged between the two supports, and a positioning clamping assembly comprises first moving grooves symmetrically formed in the top of the welding table. The top of the movable block is fixedly connected with strip-shaped frames, two sets of movable blocks are arranged at the top of the welding table and movably connected with the two sets of strip-shaped frames at the same time, a clamping block is arranged on one side of each movable block and movably connected with the two sets of strip-shaped frames at the same time, and connecting rods are hinged between the strip-shaped frames and the movable blocks through hinge pieces. The problem that the welding efficiency of the metal-based material is reduced due to the fact that positioning clamping and butt joint operation are difficult to conduct at the same time is effectively solved.

The invention relates to environment-friendly hydrophobic ink and a preparation method thereof, and belongs to the technical field of water-based ink. A copolymerization modifier capable of being combined in a water-based polyacrylate emulsion in an initiation polymerization mode in the stage of preparing the modified water-based polyacrylate emulsion is prepared, and an o-hydroxy aromatic ketone structure in the copolymerization modifier can endow water-based ink with lasting ultraviolet absorption performance; the trifluoromethyl structure can reduce the surface energy of the water-based ink, and the benzimidazole ring structure can form stable coordinate bonds with metal ions, so that the bonding performance of the water-based ink and a metal substrate is enhanced; when the copolymerization modifier is used for modifying the water-based polyacrylate emulsion, the long-term performance, the hydrophobic and oil-resistant performance and the adhesion performance on the surface of a metal base material of the finished water-based ink can be effectively improved.

The invention discloses a metal crack repairing method and device based on an ultrasonic technology. The method comprises the steps that metal powder is selected as brazing filler metal and pretreated; cleaning cracks in the metal base material and spraying a boron nitride coating; mixing an ethanol solution with brazing filler metal powder according to a preset proportion, stirring to form a uniform suspension, injecting the suspension into the crack filling area through a needle tube in a vacuum negative pressure environment, preheating to accelerate solvent volatilization, and only leaving and compacting the brazing filler metal powder; clamping and fixing the base material and putting the base material into a vacuum chamber; electron beam melting is started, snakelike scanning is conducted in the length direction of the crack, and meanwhile ultrasonic vibration is conducted on the crack; and after fusion is completed, ultrasonic vibration is continuously carried out to restrain grain coarsening. Aiming at crack repair of a high-temperature metal part, through the coupling effect of electron beam melting and ultrasonic vibration, the limitation of a single technology is broken through, and a complete and synergistic repair system is formed.

The invention provides a laser removing method for a damaged coating on the surface of a metal base material and application of the laser removing method. The laser removing method comprises the following steps that the thickness and the shape of a damaged coating on the surface of a metal base material are obtained, working parameters of a laser device are determined, laser spots generated by the laser device are concentrated on the damaged coating area on the surface of the metal base material, and laser removing treatment is conducted; wherein the working parameters comprise laser power, laser pulse width, line spacing and laser frequency. According to the method, accurate control over the removing process can be achieved, the working parameters of the laser device are adjusted based on the parameters of the damaged coating, the cleaning depth and range can be accurately controlled, customized cleaning can be conducted according to different requirements when the damaged coating is removed, the damaged coating can be completely removed, and excessive cleaning or damage can be avoided. And for some thicker metal coatings or coatings which are difficult to remove at one time, the laser cleaning can be carried out repeatedly, and the damage to the base material is avoided.

The invention discloses a coating, a preparation method and application, and relates to the technical field of anticorrosive coatings. A dry film of the coating comprises 0.1 wt%-6wt% of a lamellar filler; the lamellar filler is prepared by loading magnetic nanoparticles on the surfaces of two-dimensional nanoparticles and coating a layer of high-molecular polymer. After the coating forms a film, a specific magnetic control orientation curing method is matched, so that high dispersion stability and planar orientation arrangement of the two-dimensional nano filler in a resin matrix are realized, and corrosion of water and oxygen to a base material can be effectively blocked. When the thickness of the coating dry film is only 1-2 microns, the coating dry film still has no obvious corrosion phenomenon after being subjected to a neutral salt spray test for 2000 hours. The metal base material with the thin coating thickness has heat conductivity, corrosion resistance and weather resistance, the preparation process is simple, the cost is low, and the metal base material has extremely high market application value.

The present invention relates to the field of surface treatment technology, and in particular to a preparation method and application of a conductive anti-corrosion coating for a magnesium alloy bipolar plate, wherein the preparation method comprises the following steps: S1, mixing a conductive high molecular polymer, an adhesive and an organic solvent to obtain a coating; S2, coating the coating on the surface of the magnesium alloy to form a coating. The present invention uses a magnesium alloy with extremely low density as a substrate, and arranges a corrosion-resistant coating on the surface of the substrate. The corrosion-resistant coating uses a conductive high molecular polymer such as polyaniline as a matrix material. Polyaniline has corrosion inhibition behavior and anion exchange properties. While protecting the underlying metal substrate, it can exchange anions with chloride ions in a corrosive environment to inhibit the penetration of corrosive anions. At the same time, not only is an adhesive added to enhance the bonding strength between the polyaniline coating and the magnesium alloy and to bond the polyaniline particles, but nano-oxides are also added as corrosion inhibitors to further improve the corrosion resistance of the coating.

The invention provides a preparation method of a fusing composite belt, which comprises the following steps: providing a first metal base material, forming a first groove in a first side of the first metal base material and extending along a second direction, forming a second groove in a second side of the first metal base material and extending along the second direction, and providing a second metal base material and extending along the second direction, the melting point of the second metal base material is lower than the melting point of the first metal base material, the width of the second metal base material arranged in the first groove in the third direction is smaller than the width of the first groove in the third direction, and the second metal base material is connected in the first groove and the second groove; and second-time compounding is conducted, specifically, the first side and the second side are extruded at the same time, so that the second metal base material is in interference fit with the interior of the first groove and the interior of the second groove. According to the preparation method of the fusing composite belt, the processing efficiency of the metal composite belt can be improved while deformation and fracture of the metal composite belt are effectively prevented.

The invention belongs to the technical field of wear-resistant coatings, and particularly relates to a wear-resistant coating for a metal plate of a compressed garbage truck and a preparation method of the wear-resistant coating. The invention aims to solve the problem that an existing coating for the metal plate of the garbage truck is difficult to keep good protection performance under corrosion and abrasion. The preparation method comprises the following steps: carrying out pre-reaction grafting modification on epoxy resin and amine-terminated polyether to obtain an epoxy prepolymer; alpha-aluminum oxide and barium sulfate are mixed, dispersed, ground and subjected to surface activation, and a basic filler is obtained; adding a mica filler into the basic filler, and shearing and mixing to obtain a composite filler; mixing the epoxy prepolymer with a phosphate auxiliary agent to obtain a primer; dispersing and mixing the epoxy prepolymer and the composite filler to obtain a functional coating; after a metal base material is subjected to sand blasting treatment, primer is pre-sprayed on the surface of the metal base material, and then functional paint is covered and sprayed to obtain the wear-resistant coating. The wear-resistant coating prepared by the invention can keep good protection performance under corrosion and wear, and has high application value.

The invention relates to the technical field of functional materials, and discloses a bionic hydrophobic anti-corrosion coating construction method which comprises the following steps: S1, substrate pretreatment: performing ultrasonic cleaning on a metal substrate to remove surface oil stains and oxides; s2, laser-electrochemical composite texturing: manufacturing a micron-nano hierarchical structure on the surface of the base material by adopting femtosecond laser, and then growing a metal organic framework layer on the nano structure in situ by adopting an electrochemical method; s3, plasma activation: bombarding the surface of the metal organic framework layer by adopting Ar / O2 mixed plasma; s4, carrying out gradient fluorosilane grafting; s5, filling the dynamic covalent network; and S6, roll-to-roll continuous coating is carried out. Through a laser-electrochemical composite texturing technology and a gradient fluorosilane grafting technology, the problems that a traditional hydrophobic coating is single in structure and poor in binding force are solved, and the effects that a micron-nano hierarchical structure is constructed on the surface of a metal base material, molecular gradient arrangement is formed, the hydrophobic performance is improved, and the interface binding strength is enhanced are achieved.

The invention discloses an epoxy metal primer as well as a preparation method and application thereof, the epoxy metal primer is applied to a rust removal and rust prevention coating and coating system, the epoxy metal primer has remarkable salt fog resistance, adhesive force and weather resistance, a zinc phosphate and aluminum triphosphate composite rust prevention pigment, a modified epoxy emulsion and a high-density barium sulfate filler are adopted, the coating has excellent shielding performance, and the service life of the coating is prolonged. Corrosive media can be effectively blocked, and the salt spray resistance time is remarkably prolonged; meanwhile, the modified polysiloxane defoaming agent, the wetting leveling agent, the optimized curing agent and the optimized flash-rust inhibitor are adopted, so that the binding force between the coating and various metal substrates is enhanced, and the integrity of the coating is kept under the conditions of long-term mechanical shock, thermal cycle and damp heat. The coating is suitable for various construction conditions, simple and convenient to operate, compact and flat in coating film and capable of being widely applied to the fields of bridges, ships, petrochemical equipment and the like, the service life of a metal structure is remarkably prolonged, and maintenance and replacement cost is reduced.

The invention discloses a coating for improving the paint adhesion capability of a metal part of a distribution box, and the coating is prepared by the following steps: depositing a first oxide layer on the metal surface, the first oxide layer comprising Zn element and Ce element; a second oxide layer is deposited on the surface of the first oxide layer, the second oxide layer comprises a Zn element and a Ce element, and the molar ratios of the Zn element and the Ce element of the first oxide layer and the second oxide layer are different; a third oxide layer is deposited on the surface of the second oxide layer, and the third oxide layer comprises a Zn element and a Dy element; and a fourth oxide layer is deposited on the surface of the third oxide layer, the fourth oxide layer comprises a Zn element and a Dy element, and the molar ratios of the Zn element and the Dy element of the third oxide layer and the fourth oxide layer are different. The coating provided by the invention can improve the adhesive ability of the paint to a metal substrate.

The invention belongs to the technical field of coatings, and provides an environment-friendly solvent-free coating composition for a metal surface and a preparation method of the environment-friendly solvent-free coating composition. According to the coating composition, through the synergistic effect of the fluorine-containing polymer, the fluorinated polyester and the modified polyurethane, the corrosion resistance and the environmental stability of a coating are improved. Firstly, perfluoromethyl vinyl ether and triethanolamine react under the action of a catalyst to prepare a fluorine-containing polymer, and a three-dimensional cross-linked network structure of the fluorine-containing polymer endows a coating with hydrophobicity and chemical inertness; secondly, fluorinated polyester is prepared through free radical polymerization, and the surface energy is reduced through a perfluorinated chain segment; finally, modified polyurethane is prepared through polycaprolactone glycol, single-terminal dihydroxyl polydimethylsiloxane and the like, the surface energy is reduced through a silicon-oxygen chain segment of the modified polyurethane, and the oxidation resistance is improved through a thioether bond. The coating composition shows excellent water resistance, oxidation resistance and chemical corrosion resistance, has excellent mechanical property and adhesive force, and is suitable for protecting a metal substrate in a severe environment for a long time.

The invention discloses a porous metal-based material grinding and polishing air floating spindle and a metal-based material preparation method, the grinding and polishing air floating spindle comprises a spindle rotating body and a spindle fixing piece, and the spindle rotating body comprises a thrust plate and a supporting shaft; the main shaft fixing piece at least comprises a motor cooling sleeve, and a stator outer shaft sleeve, a thrust bearing pad, a radial bearing and a thrust bearing seat which are sleeved on the outer surface of the motor cooling sleeve; a water channel is arranged between the motor cooling sleeve and the stator outer shaft sleeve. The radial bearing is clamped between the supporting shaft and the thrust bearing seat, and a radial bearing gap is formed between the radial bearing and the supporting shaft; the thrust bearing pad is arranged in a groove of the thrust bearing seat, and a thrust plate gap is formed between the thrust bearing pad and the thrust plate; and the thrust bearing pad and the radial bearing are made of a porous metal-based material. Surface grooving machining is omitted, self-excited vibration caused by cyclone of compressed air in a groove and unsmooth exhaust is avoided, and the porous metal-based material can prevent upper and lower thrust surfaces from being scratched or even locked due to falling of particles on the surface of the bearing pad.

The invention discloses a lignin-based epoxy anticorrosive paint and a preparation method thereof. The anticorrosive paint is prepared by mixing a lignin-based epoxy anticorrosive paint component, a lignin-based phenolic amine curing agent and a diluent. According to the lignin-based epoxy anticorrosive paint disclosed by the invention, on one hand, a lignin epoxy resin acetylation modification method based on lipase is introduced, and the content of hydrophilic groups is reduced, so that formation of a compact lignin cross-linked network structure is promoted, and the barrier ability, heat resistance and aging resistance of an anticorrosive coating on a chemical medium are improved on the resin level; on the other hand, lignin and furfural are respectively used for partially replacing phenol and paraformaldehyde to prepare a lignin-based phenolic aldehyde amine curing agent with high chemical inertness, so that the protection effect of a coating in an extreme corrosion environment and the adhesive force to a metal base material are improved on the curing agent level. The lignin-based epoxy anticorrosive paint prepared by the invention has good corrosion resistance, aging resistance, thixotropy and adhesive force.

The invention discloses a preparation method of a WC reinforced composite coating. The preparation method comprises the following steps: uniformly mixing ZrO2-WC composite powder with nickel-based alloy powder to obtain raw material powder; the density of the ZrO2-WC composite powder is similar to that of the nickel-based alloy powder, and the ZrO2-WC composite powder is a core-shell structure particle formed by coating WC particles with ZrO2; and cladding the raw material powder on the surface of a metal substrate by adopting a laser cladding method to obtain the WC reinforced composite coating. On one hand, the problems of decarburization and burning loss of WC in the laser cladding process are effectively avoided through the protection effect of ZrO2 with great heat generated by coating the outside of the composite powder; in addition, the density of the composite WC reinforced powder is close to that of the parent phase of the coating, the problem that the WC reinforced phase sinks and segregates in a laser molten pool due to the fact that the density difference between the conventional WC reinforced phase and the parent phase is too large can be solved, and therefore the high-performance composite coating with the WC reinforced phase free of decarburization and burning loss, uniform in distribution and free of cracks is obtained.

The invention discloses a nickel-cobalt metal-based wear-resistant and corrosion-resistant coating and a preparation method thereof, and relates to the technical field of surface coatings, and the technical key points of the nickel-cobalt metal-based wear-resistant and corrosion-resistant coating comprise the following steps: S1, carrying out oil removal and sand blasting roughening treatment on the surface of a metal substrate, then cleaning with absolute ethyl alcohol, and drying; s2, nickel-cobalt metal-based alloy powder is prepared, wherein the nickel-cobalt metal-based alloy powder is prepared from, by weight, 55-65 parts of nickel, 20-30 parts of cobalt, 15-18 parts of chromium, 4-6 parts of molybdenum, 3-5 parts of tungsten, 1-3 parts of iron, 0.8-1.5 parts of silicon, 0.5-1.2 parts of carbon and 0.5-1.0 part of boron; the technical effect is that a regular non-smooth micro-pit array is manufactured on the surface of a sprayed layer through interlayer laser micro-texturing treatment. And the molten particles of the next layer of spraying material are embedded into the micro pits to form a strong mechanical interlocking effect, so that the interlayer bonding strength and the anti-shearing capability are greatly improved, and interlayer dislocation and stripping are effectively prevented.

The invention discloses an aromatic ketone two-photon initiator, a preparation method, a composition and application, and relates to the technical field of photoinitiators, the two-photon initiator releases alkaline species through photoinduced decarboxylation under near-infrared femtosecond laser irradiation and catalyzes anion two-photon polymerization reaction, efficient two-photon 3D printing is achieved, and the aromatic ketone two-photon initiator has the advantages of high-efficiency two-photon 3D printing, high-efficiency two-photon 3D printing and high-efficiency two-photon 3D printing. The problems of large polymerization volume shrinkage, harsh working conditions and corrosion of acidic species generated in the curing process to a metal substrate in the current free radical two-photon polymerization and cationic two-photon polymerization are solved; the method shows huge application potential in the fields of high-density optical information storage, micro-nano optical device processing, biological scaffold construction and the like.

The present application provides a heat exchanger and a manufacturing method of a heat exchanger. The heat exchanger includes a metal substrate, the metal substrate has a fluid channel for circulating a heat exchange medium; and the heat exchanger further includes a coating, the coating includes resin, silica and titanium dioxide, and the coating is arranged to cover at least part of a surface of the metal substrate. Silica particles and titanium dioxide particles are conducive to the formation of a complex micro-nano structure, and leveling and stability of hydrophilic resin contribute to long-term maintenance of the micro-nano structure. The coating of the heat exchanger according to the present application has excellent hydrophilic durability.

The invention provides a single-component modified silane adhesive as well as a preparation method and application thereof. The adhesive is prepared by mixing the following components: silane modified polyether resin, silane modified polymer resin, a plasticizer, a composite light stabilizer, a filler, a rheological additive, a water removal agent, a coupling agent and a catalyst, the silane modified polyether resin is silane-terminated resin prepared by a hydrosilylation method; the silane-modified polymer resin is a silane-terminated polymer resin containing a urethane bond. The adhesive is excellent in comprehensive performance, the tensile strength of a body is larger than 3 MPa, the elongation at break is larger than 450%, the adhesive is high in adhesion universality to metal base materials, PET films, ceramics, glass, wood floors, PVC, PC, ABS, wood-plastic composite materials and paint faces, the base materials do not need to be specially treated, the damage form is cohesive failure, and the adhesive has good adhesion strength, tear resistance and excellent temperature resistance and is suitable for being applied to the field of wood products. After aging at 120 DEG C for one week, the tensile strength of the body is greater than 3 MPa, the elongation at break is greater than 430%, and the surface layer can be coated after curing.

The invention relates to the technical field of photoresists, in particular to a positive chemical amplification type photoresist as well as a preparation method, a use method and application thereof, and aims to solve the problems that the photoresist is easily subjected to bottom residue on a metal substrate after development, and the etching yield is poor after metal electroplating in a subsequent process. The key points of the technical scheme are as follows: the mixed resin comprises first resin and second resin; an initiator, wherein the initiator comprises a photoacid production compound; the quenching agent is an alkaline agent or an acid-induced alkali production agent; the auxiliary agent comprises a protective agent, and the protective agent is a group modified azole compound; the solvent is used for dissolving the substances to prepare the positive chemical amplification type photoresist, and by optimizing the composition and the process of the positive chemical amplification type photoresist, on the premise of ensuring the adaptability and the stability of the process, the problems of the side wall angle of a product after exposure and development and the residual of the photoresist on the bottom of a metal substrate after development are effectively improved.

The invention relates to a high / low temperature wear-corrosion coupling damage test device and a quantitative evaluation method, and belongs to the technical field of wear corrosion test and material failure analysis. The device comprises a temperature-controllable corrosion test tank, a friction-wear test machine, an electrochemical workstation and a high-low temperature external circulation temperature controller, the temperature-controllable corrosion test tank is arranged on the friction-wear test machine, and friction-wear performance testing is achieved through reciprocating motion of the friction-wear test machine. And the temperature-controllable corrosion test tank is externally connected with an electrochemical workstation and a high-low temperature external circulation temperature controller and is used for testing corrosion performance and controlling temperature. According to the invention, high-precision testing and quantitative analysis of abrasion and corrosion of the metal-based material in high and low temperature environments are realized.

The invention discloses a gradient ceramic intumescent fire retardant coating and a preparation method and application thereof, and relates to the technical field of fire retardant coatings, the gradient ceramic intumescent fire retardant coating comprises a film forming substance, 10-50% of a flame retardant, 20-50% of ceramic powder, 0-10% of reinforced fibers, and 0-10% of an auxiliary agent; the ceramic powder is composed of at least three kinds of glass powder with different melting temperatures, and the weight ratio of the first glass powder to the second glass powder to the third glass powder is (1-6): (1-6): (1-6), so that the coating can form a gradient ceramic expansion layer in a fire disaster. Compared with the prior art, the ceramic expansion layer disclosed by the invention does not generate the phenomena of molten drops, damage and the like at high temperature, and can provide long-time stable and reliable thermal protection for a metal substrate.

The invention discloses a physical non-stick structure, a cooking utensil and a processing method, the physical non-stick structure is applied to the surface of a metal base material, and the physical non-stick structure comprises a shot blasting layer arranged on the surface of the metal base material and a physical vapor deposition layer arranged on the surface of the shot blasting layer. And the morphology of the surface of the physical vapor deposition layer is similar to that of the surface of the shot blasting layer covered by the physical vapor deposition layer. The physical non-stick structure and the cooking utensil have the physical non-stick performance, and compared with a traditional method, the process is simple, and the cost is low.

The present application relates to a coating composition for a foamable beverage can, a coating layer formed therefrom, and a foamable beverage can comprising the coating layer. The coating composition for foamable beverage cans includes at least one film-forming resin; and at least one bump forming agent, the at least one bump forming agent being such that when the coating composition is applied to a flat metal substrate in an amount sufficient to provide a dry coating having an average dry film weight of from about 2 to about 8 grams per square meter, the at least one bump forming agent forms a bump on the flat metal substrate. The coating composition is present in the form of a raised structure having an average of about 50 to 50,000 per square millimeter of an equivalent circle diameter of at least 1 micron on the dry coating layer formed from the coating composition.