Method of forming composite coating from silicate polymer material
FIELD: technological processes.
SUBSTANCE: invention pertains to the technology of polymer functional materials and can be used in machine building when forming coatings for component part of machines, mechanisms and transport systems, and mainly pipes for pumping petroleum products. The method of forming composition coating from silicate polymer material involves mixing powder polymer particles and silicate particles. The mixture is then deposited on the surface of the object and heated. Polymer particles are flushed off and monocrystallisation of the coating is carried out. The powder polymer particles are chosen from a group containing polyamide, polyethyleneterphtalate, high pressure polyethylene. Silicate particles are chosen from a group containing montmorillonite, kaolin, tripolite. Heating and flushing off are done in a gas stream with density of 3·106-9·106 W/m2 for a period of 10-4-10-3 s. Depositing and monocrystallisation are done on an object, heated to temperature T=Tm+5÷40°C, where Tm is the melting temperature of the polymer, with pressure of the gas stream of 3-5 atmospheres. The coating is formed by depositing it on one or more ducts of the used device for depositing it, or is deposited by successive passage of the device with the polymer component, and then a device with the silicate component.
EFFECT: increased adhesive strength, hardness and ultimate stress limit, and design of a method which provides for high production effectiveness of the process and lower cost of the coating.
3 cl, 2 tbl
The invention relates to the field of technology of functional polymer materials and can be used in mechanical engineering for coating on the details of the units of machines, machinery and transport systems, primarily pipelines for transporting petroleum products.
Polymer coatings of different composition is applied to the details of the units of machines and mechanisms to ensure the specified functions - reduce wear, reduce friction, provide the necessary insulating characteristics, corrosion resistance, etc. (Dovgalo VA, Yurkevich O.R. Composite materials and coatings based on dispersed polymer. - Minsk: Science and technology. - 1992. - s). As the polymer matrix used polyamides, Polyacetals, polyolefins, polyurethanes and other thermoplastic and Thermoelastoplastic matrix. To ensure the specified functional characteristics of the coating to the polymeric matrix is injected fillers and modifiers: powders of oxides, metals, dry lubricants, wood and other components.
Among the most common methods of applying functional polymer coatings, along with the mortar technology, fluidized bed technology, according to which you can apply coatings of different composition on the surfaces of metal parts.
Modifiers and napolnitel the polymer matrix have a decisive influence on the performance characteristics of composite materials based on them. The most common modifiers are polymer matrices of different composition and structure of the mineral components are obtained by processing natural semi-finished products: clays, micas, zeolites, etc. Received mineral powders due to the relatively low cost and availability of raw materials, as well as the active modifier action are currently tonnage used by different component matrices.
Known composition to obtain a sealing coating containing a polymer matrix and dispersed filler, which used the powder natural silicates, crushed to size 50÷100 μm, when the content in the matrix of 0.1÷3.0 wt.% (RF patent for the invention №2275404). A coating of this composition is applied by fluidized bed method. According to this method, cleansed and fat metal surface heated to a temperature of 30-50°exceeding the melting temperature of the matrix polymer, dip into the composite layer of powdered material placed in suspension, can withstand a specified time for the deposition of the layer of material of the required thickness, then remove from the work area setup and stand in the air until complete melting of the polymer material and forming a continuous bestepe the private coverage. This technology is described in the monograph of Dovgalo VA, Yurkevich O.R. Composite materials and coatings based on dispersed polymer. - Minsk: Science and technology. - 1992. - s. She was selected for the prototype of the invention.
Among the disadvantages of this method is the separation of components with different mass due to the different specific gravity with the same geometric dimensions, resulting in an inhomogeneous coatings. In addition, to ensure the required level of adhesion of the coating to the substrate must be processed by a special primer (sublayer), which is an expensive and environmentally unsafe product, or phosphotyrosine. This method does not allow to apply a coating to products of large geometric dimensions, mass and complex configuration.
It is known that low-dimensional fillers and modifiers with a particle size less than 100 nm have significantly higher activity compared to particles of the same composition with a dimension of more than 1 μm (Pomogailo ROAD, Rosenberg, A.S., upland I.E. Nanoparticles of metals in polymers. - M.: Chemistry. - 2000. - 672 C.). Traditionally in polymer science applied fillers with a particle size of from 5 to 200 microns.
A method of obtaining low-dimensional fillers of natural layered minerals for polymeric materials (tent the Russian Federation for invention №2269554). The method consists in the treatment of the particles of the layered silicate type clay minerals and micas in thermal shock, which causes the destruction of the crystal lattice as a result of dehydration. In this way we obtain a low-dimensional particle size of not more than 100 nm, which according to modern classification referred to as nanoparticles.
The disadvantage of this method of obtaining low-dimensional particles is in need of special operations heat treatment, which is repeated several times to ensure particle size distribution of the modifier.
The present invention is to develop a method of forming composite coatings of selectonemenu materials, in which the operation of obtaining low-dimensional particles and the formation of the coating would be combined. This will improve the performance of the method, the coating quality, and create conditions to reduce its cost. In addition, the developed method should ensure that the coating on the details of large geometric dimensions, mass and complex configuration.
The task of the invention is achieved by a method of forming a composite coating of silicacontaining material is that the mixed powder is the crustacean leaves of polymer particles, selected from the group comprising polyamide, polyethylene terephthalate, high density polyethylene, and silicate particles selected from the group comprising montmorillonite, kaolin, Tripoli, precipitated mixture on the surface of the workpiece is heated, upravlyaut polymer particles and are monolithically coating, the heating and melting is carried out in a gas flow with a density of 3·106÷9·106W/m2for 10-4÷10-3with, sedimentation and monolithically conduct on the part heated to a temperature of T=Tp+5÷40°s, where Tpthe melting point of the polymer, when the pressure of the gas stream 3-5 ATM. The coating is formed by applying it in one or more passes of the device to be used for its application. In addition, the coating is formed by applying it by serial passage of the device with the polymer component, and then the device with the silicate component.
When forming selectonemenu coatings used the following components. As the polymer matrix used powders of polyamide 6 (PA6), produced by JSC grodnokhimvolokno, polyamide 11 (Rilsan) manufactured by ELF ATOCHEM (France), polyethylene terephthalate (PET) production of JSC "Mogilevkhimvolokno", high density polyethylene (HDPE) produced by JSC "Polymir" (Novopolotsk). Powders PA6, PET, P is VD received cryogenic grinding of granules, cooled to liquid nitrogen temperature (-198°). The dispersion of the powder was 100-200 μm. As a natural silicate used powders of clay minerals: montmorillonite, kaolin and Tripoli, representing natural mixture of montmorillonite and zeolite content 40÷60:60÷40 wt.%. Powders of minerals was obtained by grinding the dried semi-finished product in the mill percussion. The dispersion of particles of minerals does not exceed 1-5 microns.
Composite selectonemenu material was obtained by mixing powder components in a high-speed mixer type MOD-22 (the so-called "drunken barrel") to obtain a homogeneous composition. As technological equipment for coating according to the claimed method used to install TENA-P. the Working gases was propanebutane mixture and oxygen. The temperature of the gas stream (heat flux density) was regulated by changing the ratio and the feed rate of a mixture of propane-butane-oxygen". The substrate was heated gas stream to the optimal temperature of formation of the coating. The temperature of the substrate was controlled by pyrometer DH-39650-02 (USA). The coating is formed of a heat flux of a certain density, which gave a mixture of polymer and silicate components. The residence time of the material components in heat is the base flow was regulated, changing the oxygen pressure and propanebutane mixture. The density of the heat flow was calculated by the heat balance equation:
where m is the mass of particle, kg; m=4πR3ρ/3; R is the particle radius, m; ρ - density of material, kg/m3; Tabout- the initial temperature of the particle, K; TPLthe melting point of the material particles, To; Tmaxthe maximum temperature of the particle, K; Tmax=1,3 Tp; C1(T1) is the specific heat capacity of the material particles when heated from Taboutto Tp, J/(kg·K),2(T2) is the specific heat capacity of the material particles when heated from Tpto Tmax, J/(kg·); λ - specific heat melting particles, j/kg; F is the particle surface area, m2; ν is the particle velocity, m/s; Ix- distance to the sprayed surface; α(x) - heat transfer coefficient, W/(m2·K); Tp(x) is the temperature of the gas stream, TC(x) is the temperature on the surface of the particle, K.
The floor of the prototype was formed from powder mixtures, which were placed in the installation with the possibility of creating a fluidized bed by passing a stream of air through the layer of composite material on a porous diaphragm. The metal piece was degreased and treated with primer Rilprim by dipping on the hoist in alcohol solution. The thickness of the sublayer of 3-5 µm. After drying, the substrate part was heated in a heating Cabinet type SNOL to a temperature of 270-320°to activate the substrate and immersed in a boiling layer of composite material at a given time. The exposure time was determined by the thickness of the coating. After deposition of the particles of the powder composition, the item was removed from the working volume of installation and maintained in the air until complete melting of the polymer particles and monolithically coating, after which the product was cooled in air to room temperature. Features formed in different ways coatings was evaluated by the adhesion strength with the substrate by the method of normal separation, Brinell hardness and tensile strength. The compositions of composite materials in both methods were identical.
Technological modes of formation of coatings from selectonemenu compositions according to the proposed method and the prototype are listed in table 1.
Characteristics of coatings from selectonemenu composite material according to the developed method and the prototype are presented in table 2.
As follows from the data of table 1 and 2, a method of forming selectonemenu coatings exceeds the prototype performance, has a lower energy intensity and includes a smaller number of technological operations, since the heating process, t is tiravanija, application and monolithically coating proceeds at the same time.
The essence of the claimed technical solution is the following. During the mechanical mixing of the powder component particles of silica filler having a size of 1-5 microns, are distributed on the surface of the polymer particles with a size of 100-200 μm. When making composite particles in high temperature gas stream is the activation of the surface layer of the polymer particles resulting from the removal of low-molecular adsorbed substances and partial oxidation of the surface layer. At the same time is heated, melting the polymer particles and degradation of silicate particles in the processes of dehydration and dehydroxylation with the formation of low-dimensional particles.
The flow of the gas jet of the molten particles of polymer with low-dimensional fragments fracture of layered silicates on the surface are transported to the solid substrate. The time of transportation and heating is 10-4÷10-3with, resulting in a certain capacity of the heat flow in the claimed range does not occur deep thermal-oxidative and thermal destruction processes, which could cause the destruction of the polymer matrix. When kontaktierung the solid substrate isolated fragments of the composite material are deformed and become lamellar form, strongly associated with the surface. Each subsequent particle under the pressure of the gas jet interacts with a previously fixed by the particle on the surface, leading to the formation of the coating and its homogenization. Preheating the metal substrate prior to the stated temperature range helps to slow crystallization processes in polymeric matrix and increases the adhesion interaction of the boundary layer of the coating and the metal substrate. Moving the process plant area of the working surface allows to form a coating on the details of a large area, and through the implementation of several serial passages may be formed of a coating of the desired thickness, including a local area of the treated surface. Significant difference between the claimed process from the prototype is the reduction of defects in the coating. When the method of applying a coating of fluidized bed (prototype) consolidation of the coating is in the spreading of individual fragments (drops) of the polymer on the substrate surface under the action of surface tension forces. This captures a significant amount of adsorbed air, which focuses mainly in the interparticle space and forms a coating defects in the cross section. Heat treatment is formed by coating significantly reduces the defect due to the low rate of removal of air bubbles from the melt. The introduction of solid-phase particles in the coating composition increases the number of defective parts due to the increased number of interfaces "polymer matrix, the solid particle".
According to the developed method, the formation of coatings defects is significantly reduced due to the mechanical action of the gas stream to form a coating. Mechanical contact of single fragments displaces from the interparticle region of the gas component, reducing the defect coverage. This mechanical action activates the effect of surface tension forces acting between the individual particles.
Another significant difference between the claimed process from the prototype is the formation of low-dimensional particles directly in the process of forming the coating as a result of thermal degradation of the initial particles of the layered silicate. The generated particles are introduced into the boundary layer of the polymer particles and cause its regulation. In the process of applying is formed spatial framework of an ordered quasi-crystalline regions, reinforced with nanoparticles, which causes an increase in strength, hardness and adhesive strength of the coating on the metal substrate. Therefore, when the same ratio of components of the polymer matrix silicate filler cover, set up shop data is private technology fluidized bed, superior physical-mechanical characteristics of the prototype.
Thus, significant technical differences between the claimed method of forming selectonemenu coatings from the prototype, are the subject of the invention, are:
- the combination in a single manufacturing operation processes the activation of components of the heating and forming of the coating when combined thermal and mechanical action of the gas stream;
- preventing thermal oxidative degradation of the polymer matrix due to the short time of exposure to heat and the absence of gas flow active oxygen or its compounds with a strong oxidative effect;
- the formation of low-dimensional silicate particles due to thermal degradation of the initial particles under the action of heat the gas stream directly in the process of forming coatings;
- reducing coating defects due to mechanical action of the high temperature gas stream into fragments coatings and their deformation upon contact with the surface;
- the possibility of formation of gradient coatings on the large geometrical dimensions, mass and complex configuration.
The coating formed on the metal parts on the stated technological regimes. When increasing the heat on the eye in excess of the declared value (option III b) or decrease (option IIIand), the decrease of the substrate temperature (option IIIandor increased beyond the stated ranges (option IIIb) decrease the indicators of the performance characteristics selectonemenu coatings. The floor is formed by the claimed method for one or more passes depending on the dimensions and requirements of technical documentation. Option complete method is the use of two processing plants - spray heads, one of which is applied to the polymer binder, and the other silicate filler. This variant of the method allows to achieve a more complete degradation of the particles of the layered silicate under the action of high temperature gas stream and provides the possibility of forming a gradient of the single-layer and multilayer coatings with a strong bond at the interface between the layers.
Selectonemenu coating formed by the claimed method were used for the manufacture of parts of motor units at JSC "BelCard", for processing metal supports networks on the Belarusian railway and showed its effectiveness when used in accordance with the technical specifications.
1. Method of forming a composite coating of silicacontaining material, which consists in the fact that cm who're asked powdered polymer particles, selected from the group comprising polyamide, polyethylene terephthalate, high density polyethylene, and silicate particles selected from the group comprising montmorillonite, kaolin, Tripoli, precipitated mixture on the surface of the workpiece is heated, upravlyaut polymer particles and are monolithically coating, the heating and melting is carried out in a gas flow with a density of 3·106·9·106W/m2for 10-4-10-3with, sedimentation and monolithically conduct on the part heated to a temperature of T=Tp+5÷40°s, where Tpthe melting point of the polymer, when the pressure of the gas stream 3-5 ATM.
2. The method according to claim 1, characterized in that the coating is formed by applying it in one or more passes of the device to be used for its application.
3. The method according to claim 2, characterized in that the coating is formed by applying it by serial passage of the device with the polymer component, and then the device with the silicate component.
FIELD: metal processing.
SUBSTANCE: invention refers to processing of polymeric functional materials and can be used in machine building at coating of machine and aggregate units and units of transport systems, mainly pipes for transmission of oil products. The method for producing metal-polymeric coating consists in mixing polymer particles in a powdered form and metal containing precursor particles in a powdered form. Then a powdered mixture is settled on the surface of a unit and heated; polymer particles are melted. After that, thermolysis of the precursor and monolithic integration of coating are carried out. Polymer particles in a powdered form are selected out of a group containing polyamide, polyethylene terephthalate and polyethylene of high pressure. Particles in a powdered form of metal containing precursor represent formate or oxalate of copper, nickel, zinc or carbonyl iron. Heating, melting of polymer particles and thermolysis of precursor are carried out simultaneously in a thermo gas flow with a density of 3·106 -9·106 Wt/m2 within 10-4-10-3 sec. The mixture is settled and monolithic integration of coating is performed on the unit heated to a temperature of T=Tm+5÷40°C, where Tm is the temperature of polymer melting at the density of the gas flow of 3-5 atm.
EFFECT: method allows for high processibility and upgrading of adhesion hardness, strength and rupture strength at tension.
FIELD: engines and pumps.
SUBSTANCE: invention relates to methods of material coating effected by spraying and can be used in metallurgy for production of coated materials, in agriculture for killing wreckers and, in medicine, for the disinfection purposes or treatment of diseases of breathing organs. The sprayer contains a capacity in the form of a cup with a cover outlet line rigidly connected to it, the electric motor with the shaft arranged inside the said capacity, and a mixer fixed on the motor shaft, the mixer blades being arranged in the capacity lower part. The deflector made in the form of, at least, two disks, located on some distance from each other, is fitted on the motor shaft under cover. Each disk has, at least, two diametrically located slots, with the slots of one disk are shifted relative to the slots of the other disk.
EFFECT: more uniform distribution of powder materials and ruling out an ingress of major particles into outlet line.
3 cl, 3 dwg
FIELD: powder metallurgy.
SUBSTANCE: proposed powder material contains the following components, mass-%: graphite, 4.0-6.0; chromium, 40.0-50.0; lanthanum oxalate, 0.3-0.5; boron, 1.0-2.0; silicon dioxide, 6.0-20.0; the remainder being aluminum oxide.
EFFECT: enhanced scale resistance of coat on piston ring surfaces.
FIELD: application of coats by gas dynamic methods.
SUBSTANCE: first flux is applied on surface of part at activity time of 0.2-0.25 h which contains up to 30% of ammonium chloride NH4Cl, up to 70% of zinc chloride ZnCl2 and up to 2% of potassium permanganate KMnO4. Then, surface is heated over flux with the aid of torch producing oxidizing flame to temperature of (0.14-0.2)Tml., where Tml. is cast iron melting point. Then, part is treated with abrasive powder at size of particles of 30-300 mcm. Compressed air is heated and is fed to supersonic nozzle where supersonic air flow is formed; powder material for forming the coat is fed to this air flow in the direction of surface of article to be coated.
EFFECT: enhanced adhesion strength of coat on cast iron articles.
2 dwg, 3 tbl, 1 ex
FIELD: mechanical engineering; devices and methods for deposition of the gas-dynamic coatings.
SUBSTANCE: the invention is pertaining to the technology of deposition of the coatings on the surfaces of the products, in particular, to the gas-dynamic methods of deposition of the coatings with utilization of the inorganic powder and may be used in the different branches of mechanical engineering. The compressed gas is fed in the heater (1), where it is heated up to the necessary temperature ensuring the lack of the particle pickup on the walls of the nozzle. The heated gas is fed in the supersonic nozzle (2), in which it passes sequentially the narrowed section, the throat (3), the expanding section of the nozzle and is accelerated up to the supersonic speed. The powders of the sputtered material are introduced in this supersonic flow of the gas through the components (5)used for inlet of powders in the nozzle. The particles of the powders are accelerated by the high-speed gas current on the accelerating section (7) of the nozzle and further are guided onto the surface of the base. The substance of the invention consists that it estimated parameters of the nozzle section arranged after the components for introduction of the powders and intended for acceleration of the powders, which ensure the increased coefficient of the sputtering at conservation of the possibility to use the heightened temperature of the compressed gas and utilization of the powders containing the solid particles.
EFFECT: the invention ensures the increased coefficient of the sputtering at conservation of the possibility to use the heightened temperature of the compressed gas and utilization of the powders containing the solid particles.
18 cl, 2 tbl, 2 dwg, 3 ex
FIELD: application of anti-friction coats on inner cylindrical surfaces of parts formed by anode-cathode micro-arc oxidation.
SUBSTANCE: workpiece and device are rotated in opposite direction. Reciprocating oscillations are imparted to device along axis of surface being treated at swing and frequency determined by the following formula: Δ=(0.05-0.2)·b, f=(0.4-1.6)(ω1-ω2), where Δ is swing of oscillations of device in axial direction, mm; f is frequency of oscillations of device, Hz; b is width of rubbing member, mm; ω1 is angular velocity of rotation of workpiece, rad/s; ω2 is angular velocity of device, rad/s. Device proposed for realization of this method has body (1) with deforming member (5) and rubbing member (6) mounted on it. Rubbing member (6) is made in form of plate embracing deforming member (5). Body (1) is made in form of hollow cylinder provided with circular threaded bore (2) at the end where elastic member (4) and deforming member (5) are secured by means of thrust washer (3). Elastic member is rigidly connected with body (1) and deforming member (5) provided with oxide heat-insulating coat on its outer surface; it is also provided with circular groove for receiving rubbing member (6). Thickness of rubbing member (6) is equal to Δ=(1.3-2.0)·δ c(D/d)·(B/b), where δ is thickness of rubbing member, mm; δc is thickness of coat being formed, mm; D is diameter of cylindrical surface being treated, mm; d is diameter of outer surface of rubbing member, mm; B is width of cylindrical surface being treated, mm; b is width of rubbing member, mm. Through slot (7) made in body (1), elastic member (4) and deforming member (5) is used for securing the rubbing member to exclude its slippage. Proposed method extends functional capabilities of application of copper-based anti-friction coat on aluminum cylindrical surfaces.
EFFECT: extended functional capabilities; reduced contact pressure in zone of treatment.
3 cl, 2 dwg
FIELD: application of coats and production of materials of functional specific properties; application of coats protecting articles against aggressive action of outside medium.
SUBSTANCE: proposed method includes cold spraying of powders from two or more proportioners operating independently. Control of flow rate of powders from proportioners operating independently is performed according to definite dependence making it possible to obtain functional coats at high adhesive property.
EFFECT: enhanced efficiency; improved operating characteristics.
4 cl, 3 dwg, 1 tbl, 1 ex
FIELD: metalworking; mechanical engineering.
SUBSTANCE: alloying agent in form of powder is applied to working surface of article by explosion. At explosion application of alloying agent, layer of this agent is placed directly on working surface of article and layer of explosive charge following the shape of working surface is laid over it. Explosive charge is initiated by excitation of sliding shock wave in alloying agent. If it is necessary to enhance wear resistance of working surfaces when increase of hardness is not required, inert gasket following the shape of surface being treated is laid in between alloying agent and explosive charge.
EFFECT: facilitated procedure of method at simultaneous increased service life of parts due to enhanced wear resistance of working surfaces.
2 cl, 2 dwg, 2 ex
FIELD: processes for applying coatings by chemical deposition for obtaining hard wear resistant coatings.
SUBSTANCE: method comprises steps of applying onto surface of steel containing carbon, at least 0.2 mass %, preferably 0.7 -1.2 mass % and chrome, 4 - 12 mass % at least one metal of 5-th Group with atomic number no more than 41. Chemical deposition is realized at rotating article in fluid-tight vessel at temperature 870 - 1110° C practically without air provided with source of powder mixture containing at least one metal of 5-th Group with atomic number no more than 41 and halogen catalyst. Said powder mixture contains up to 50 mass % of inert particles for the total mass of mixture. Such method is used for making rollers of chains with hard coating containing chrome carbide, 1 - 3%. Steel for making articles contains, mass %: carbon, 0.7 - 1.2; chrome, 4 - 8; manganese, 0.25 - 0.45; silicon, 0.25 - 0.55; molybdenum, 0.2 - 0.55; phosphorus, no more than 0.03; sulfur, no more than 0.03; aluminum, no more than 0.05; iron, the balance.
EFFECT: possibility for making article with coating highly resistant against shearing and exfoliation.
20 cl, 4 dwg
FIELD: application of anti-score coats on sections of oil well tubing.
SUBSTANCE: proposed method consists in rotating the tube along its longitudinal axis and applying the coat on threaded section. Application of coat is performed by at least two air-powder jets. Jets are rectangular in cross-section and are directed in such way that axis of each jet lies in plane passing through axis of tube and is inclined to it at angle of 30-40°. Jets are inclined relative to tube axis to opposite sides. Wide sides of jets have length equal to 0.3-1.0 of length of threaded section; they are positioned along tube axis. Specification contains description of device for realization of this method.
EFFECT: improved quality of spraying due to smooth distribution of metal over thread surface.
9 cl, 3 dwg, 2 ex
SUBSTANCE: invention pertains to compositions based on soluble fluoropolymers, meant for protecting metallic surfaces from action of water and aggressive media. The compositions can be used in the chemical industry and other industries when making equipment. Description is given of the anticorrosive composition is given. It consists of a soluble copolymer of tetrafluoroethylene with vinylidene fluoride, organic solvents - acetone, ethylacetate, cyclohexanone and amyl acetate, low molecular epoxide diane resin of the "ЭД-8" or "ЭД-10" type, amine hardening agent product of condensation of formaldehyde and phenol with ethylenediamine of the "АФ-2" type, diluting agent - ethyl cellosolve and an extra filler - graphite or molybdenum sulphide with proposed ratios of the components. Description of the method of coating metals is also given, in which the above mentioned composition is deposited on a non-greasy surface. The first and subsequent layers are dried under the same conditions at temperature of 15-25°C for a period of 20-30 minutes, and final coating is done at 120-200°C for 4-6 hours.
EFFECT: protection of metal surfaces from water and aggressive media.
3 cl, 5 ex, 2 tbl
SUBSTANCE: invention relates to protection of metals from corrosion using lacquer coating. This engineering problem can be solved by using calcium hydroxyethylidenediphosphonate with formula CH3(OH)C(PO3)2Ca2 as an anti-corrosion pigment, with higher anti-corrosion activity as compared to the prototype - protonated zinc hydroxyethylidenediphosphonate and a control specimen - zinc tetraoxychromate.
EFFECT: low-toxic high performance anti-corrosion pigment.
1 tbl, 3 ex
SUBSTANCE: invention concerns antirust modificating coating obtained from composition of (mass %): orthophosphoric acid -25.0-40.0; graphite "ГЭ-3" - 12.0-30.0; acryl dispersion Diakam-11 -30.0-50.0; auxiliary substance "ОП-10" - 0.25-2.5; industrial flaxseed oil - 2.0-10.0; concrepol "B" based on water solution of poly-N-vinylpyrrolidone - 0.2-2.0.
EFFECT: application at temperature below zero possible; faster drying; wide range of storage temperature; longer storage without exfoliation and wider range of maintenance temperatures for a building covered with this coating.
FIELD: inorganic chemistry.
SUBSTANCE: invention refers to anticorrosive coatings of cold drying and can be applied for corrosion prevention of steel, zinc-coated steel, cast-iron and aluminium surfaces. Described anticorrosive paint-and-lacquer composition is cured with aliphatic polyisocyanate containing hydroxyl acrylic or polyester resin, pigments, filling agents, organically modified polysiloxane, organic solvent, structure-forming agent, thermoplastic acrylic copolymer, dispersant at specified components ratio. Technical result is coating based on specified composition having high protective properties as tested in mineral oil, petrol and water.
EFFECT: production of anticorrosive coating with high protective properties.
2 tbl, 3 ex
FIELD: inorganic chemistry.
SUBSTANCE: anticorrosive composition is applied for corrosive prevention of reinforced concrete and metal surfaces of structures and equipment in high humidity and sulphur dioxide, hydrogen sulphide, chlorine, ammonia. Anticorrosive composition contains industrial lignosulphonates, tall pitch, colophony, pigment-aluminium powder PAP-1, reducing agent - titanium dioxide, zinc phosphate, zinc oxide, hardener - polyethylenepolyamine, modifying agent - hexamethylenetetramine, providing high water resistance. To provide rheological properties composition contains acryloyltrimethylamidopropylammonium chloride in amount 0.02 weight fractions 0.02. Technical result is improved light resistance, reduced dryout period and widen range of colours of protective coating.
EFFECT: production of anticorrosive coating with improved protective properties.
3 cl, 2 tbl
FIELD: antifriction materials.
SUBSTANCE: invention relates to antifriction compositions based on soluble fluoropolymers that can be used to coat surfaces of piston rings, sealing rings, ring gaskets, collars, and other antifriction rubber parts used in friction units of machines in instrument engineering, chemical machinery construction, automobile industry, and aircraft industry. Antifriction composition described in invention comprises soluble tetrafluoroethylene/vinylidene fluoride copolymer, organic solvents: acetone, ethylacetate, cyclohexanone, and amyl acetate, low-molecular weight epoxy dian resin ED-8 or ED-10, amine hardener (product of condensation of formaldehyde and phenol with ethylenediamine AF-2), diluent (ethyl cellosolve), and, additionally, filler: graphite or molybdenum disulfide.
EFFECT: increased wear resistance and durability of rubber sealing members.
2 cl, 3 tbl, 5 ex
FIELD: polymeric materials.
SUBSTANCE: invention relates to polymeric protective materials and can be used for creature of anticorrosive covers. Photohardening composition for cover comprises the following components, mas. p. p.: polysulfide oligomer, 5-10, unsaturated polyester resin, 100-105, and a photoinitiating agent, 3-6. Resin of sort PN-9119 is used as unsaturated polyester resin that represents products of polycondensation of propylene glycol with dimethylterephthalate and maleic anhydride dissolved in styrene (the styrene concentration is 35-45%). Proposed composition provides the high hardening rate to obtain materials showing the high cross-linking frequency and regularity of structure that enhance bending and stretching strength, resistance against corrosion and adhesion properties of the cover.
EFFECT: improved and valuable properties of composition.
2 tbl, 10 ex
FIELD: protective materials.
SUBSTANCE: invention relates to paint and varnish materials applied on surface for anti-corrosive protection of metallic construction and exhibiting large exploitation period. Paint and varnish materials comprise conducting polyethylene as a film-forming substance. Invention provides enhancing effectiveness of anti-corrosive protection of metallic constructions for prolonged exploitation period and enhancing working life of anti-corrosion cover for metallic constructions based on creature the uniform electric potential on a cover surface equal to the potential value of metallic construction to be protected and realization the additional protection effect.
EFFECT: improved and valuable properties of material.
FIELD: cathodic protection of metalwork.
SUBSTANCE: proposed paint-and-varnish material for corrosion protection of metalwork includes electrically conducting film-forming agent (electrically conducting polyethylene) and carbon nanotubes, from 10 to 80% of volume of paint-and-varnish material which increase electric conductivity and resistance to aggressive media and consequently mechanical strength of metalwork. Proposed paint-and-varnish material may additionally contain high-dispersed zinc powder ensuring additional cathodic protection from 40 to 90% of volume of paint-and-varnish material.
EFFECT: enhanced efficiency of corrosion protection of metalwork during protracted period of operation due to smooth electrical potential equal to potential of metalwork being protected.
5 cl, 1 tbl
FIELD: corrosion protection.
SUBSTANCE: invention describes using fine amorphous silica as collector for substances forming coating protecting a structural material against corrosion.
EFFECT: reduced consumption of expensive reagents in a protective pigment preparation process, reduced toxicity of materials based thereon, simplified pigment preparation technology, and increased adhesion of resulting materials for a structure surface.
SUBSTANCE: powdered coating agent contains solid particles of a resin-polyurathane binding substance with equivalent mass of olefinic double bonds ranging from 200 to 2000 and content of silicon bonded in alkoxy silane groups ranging from 1 to 10 mass % and a photoinitiator. In the method of obtaining a single layered or multilayered coating on substrates, in particular when obtaining multilayered coating for transportation equipment and their components (car body or car body components coating), at least one layer of this coating is deposited from a powdered coating agent. In that case, solidification of at least one layer of the above mentioned powdered coating is achieved through free-radical polymerisation of olefinic double bonds when irradiated with high energy radiation and through formation of siloxane atomic bridges under the effect of moisture.
EFFECT: obtaining a powdered coating, which is hard, has scratch resistance and good resistance to chemical effects.
8 cl, 1 tbl