The rust converter
(57) Abstract:The invention relates to coatings industry, namely modifiers rust, which are used for coating metal surfaces without pre-treatment from rust, including those of oil and oil contamination. We offer the product contains phosphoric acid, graphite, lignosulfonate and water. These components taken in the following ratio, wt.%: phosphoric acid 38-50, graphite 25-33, lignosulfonates 0,5-1,0, water the rest. In addition to the ability to convert the rust, covered with fat and oil stains, rust Converter has inhibitory ability, i.e. the ability to inhibit the corrosion process under normal conditions and at elevated temperatures - reducing properties. The proposed rust Converter can be operated in the temperature range from minus 30 to 500°C at the temperature of application is from minus 30 to 60°C. When the operating temperature of 150-170°With the proposed Converter does not require overlap of paint material, because under these conditions it happen irreversible chemical and structural changes in the sector: gas, petroleum, shipbuilding, agriculture, etc., 1 table. The invention relates to coatings industry, namely, modifiers, rust, used for coating metal surfaces without pre-treatment of the products from rust, including oil and oil pollution.Known modifier rust, containing, wt.%: lignin 14-16, phosphoric acid 16-20, soap stock from 1.5 to 3.0, ethanolamine 1.5 to 2.5, natural linseed oil 2-3 and water the rest (ed. St. USSR N 1595864, C 09 D 5/12, Modifier rust" Appl. 15.06.88. Publ. 30.09.90, BI N 36).The disadvantage of this Converter rust is the inability to apply on polluted or oily surfaces.The closest technical solution, selected as a prototype, is the modifier rust, containing phosphoric acid, kaolin, graphite and water Color on rust-79. Abstracts of the third all-Union scientific-technical seminar. Bitter, 1979, S. 45-46).The disadvantage of this modifier rust is the inability to use samosatenus and greasy rusty metal surfaces.The challenge cat is Ernesta, including oily and polluted.The technical result obtained using the proposed Converter rust - can be used as usual rusty metal surfaces, and contaminated or oily surfaces without prior removal of these contaminants.The task and the technical result is achieved by the fact that the known rust Converter, in addition to phosphoric acid, graphite and water, additionally contains lignosulfonates with the following ratio of ingredients, wt.%:
Phosphoric acid - 38-50
Graphite - 25-33
The lignosulfonate - 0,5 - 1,0
Water - the Rest
Comparative analysis of the prototype allows us to conclude that the claimed composition of rust Converter differs from the known introduction of lignosulfonates. Thus, the proposed solution meets the criterion of "novelty".The technical result obtained when using the rust Converter containing phosphoric acid, graphite, lignosulfonate and water, allows to solve the existing industrial problem - the possibility of its application on samosatenus and simultaneoulsy level."The rust was obtained as follows. The pre-crushed in a mortar or in a laboratory mill and sieved through a sieve with the hole diameter 0.125 mm graphite marks THE GSS 21-25-166-75 poured into the beaker, into which is poured with simultaneous mixing orthophosphoric acid brand "h" GOST 6552. The resulting mixture was homogenized.In another glass, poured the powdered lignosulfonate TU technical-13-0281-036-15-90 and dissolve them in water GOST 2874. The resulting solution of lignosulfonate pour into a glass with a mixture of graphite and phosphoric acid. After the ingredients are thoroughly mixed until syrupy homogeneous mass of dark gray with metallic luster, having a density of 1,585-1,590 g/cm3.Example. To obtain 100 g of rust Converter in the beaker with a capacity of 200 ml asleep 30,3 g (30.3 per cent) of graphite REG THE 21-25-166-75 with a particle size of not more than 0.125 mm and poured under stirring at 45.9 g (45,9%) orthophosphoric acid brand "h" GOST 6552. The resulting mixture was homogenized.In another Cup fall asleep 0.8 g (0,8 %) of powder sodium lignosulfonates TU-13-0281-036-90, dissolve them in 23 g (23%) water GOST 2874, and then poured tion is stirred until syrupy homogeneous mass of dark gray with metallic luster and density 1,585-1,590 g/cm3.Other compositions are prepared in the same way.For testing, the results of which are presented in the table were taken from well-known drug and offer.Testing is carried out as follows. On a rusty steel plate size 50 x 100 mm with a thickness of rust to 150 μm brush applied petroleum oil, mineral oil (engine), the fuel oil. These materials put such quantity that the location of the plates vertically in some time on their surfaces begin to form stains. On the thus prepared plate is circular and translational motion with pressure applied known and proposed rust converters.When applying the known rust on the plates are formed balls, which poured from the surface, leaving the oily and greasy surfaces of the plates. This is due to the absence in the composition of surface-active substances, whose role in the proposed composition perform lignosulfonates. Therefore, as can be seen from the table, for the well-known rust is not characteristic parameters such as adhesion, opacity, transforming ability.
FIELD: paint and varnish industry.
SUBSTANCE: invention relates to rust modifying agents that are used for applying on corroded metal surfaces. The described anticorrosive modifying coating comprises the following components, weight %: acrylic dispersion "Diakam-11" as a film-forming agent, 36.0-48.0; graphite GE-3 as a pigment and filling agent, 14.0-23.0; 8-oxyquinoline as a chelating agent, 0.5-1.8; ortho-phosphoric acid as a modifying additive, 25.0-35.0; polyethylsiloxane liquid PES-5, 5.0-10.0; accessory agent OP-10, 0.2-0.5, and concrepol AD-1 based on poly-N-vinylpyrrolidone aqueous solution, 0.5-1.5. Invention provides the possibility for effective conversion of rust to neutral undercoat, prolonged exploitation time being both in corrosive and water-saturated media and under conditions of open atmosphere in the range of temperatures from -70°C to +200°C and without additional overcoating with paint and varnish materials and without applying on mazut-coated and oiled metallic surfaces without their degreasing.
EFFECT: improved and valuable properties of coating.
FIELD: protective materials.
SUBSTANCE: invention relates to a method for preparing priming coat for steel that is designated for assembly and applying upper coat. Steel in grounded with priming coat comprising a silicon dioxide-base binding substance containing silicon dioxide aqueous sol stabilized with aluminum oxide and, optionally, small amount of alkaline metal silicate. Indicated binding agent shows the mole ratio SiO2/M2O = at least 6:1 wherein M means the total amount of alkaline metal ions and ammonium ions. After drying the priming coat up to disappearance of stickiness in weal touch by a finger it is treated optionally with a solution that enhances the strength of the priming coat film.
EFFECT: improved and valuable properties of coat.
12 cl, 7 tbl, 21 ex
FIELD: building materials.
SUBSTANCE: invention relates to a method for preparing an aqueous epoxide corrosion-stable priming used for protection against corrosion and no containing hexavalent chrome compounds. Priming comprises aqueous epoxide compound based on bisphenol A diglycidyl ester, hardening agent and chromate-free pigment inhibiting corrosion. Hardening agent is taken among the group comprising aqueous modified adducts of amines or polyamidoamines decreasing the water content. Chromate-free pigment inhibiting corrosion comprises chromate-free pigment additive inhibiting corrosion that is taken among the group comprising mixtures of cerium molybdate with bismuth vanadate, cerium molybdate with strontium tungstate, cerium phosphate with strontium tungstate, bismuth vanadate with bismuth molybdate and strontium tungstate, and their mixtures also. Pigment-filling agents and hydrophobic hardening agent are added to the priming composite for enhancing waterproofness and corrosion resistance. Invention provides excluding the negative effect of hexavalent chrome on environment objects and human body.
EFFECT: improved and valuable properties of priming.
FIELD: paint and varnish industry.
SUBSTANCE: invention relates to rust modifying agents that use used for coating rust metallic surfaces without their preliminary cleansing from rust, among them, with mazut and oily pollutions and can be exploited in the range of temperatures from -50°C to +500°C. Proposed rust transformer comprises the following components, wt.-%: ortho-phosphoric acid, 37.0-51.0; graphite, 24.0-34.0; concrepol B, 0.3-1.2; lignosulfonates, 0.5-1.0, and water, 18-27. Invention provides enhancing effectiveness and prevention of separating into layers of the transformer for liquid and solid phase at prolonged storage.
EFFECT: improved and valuable properties of transformer.
FIELD: paint and varnish industry, anti-corrosive agents.
SUBSTANCE: invention relates to corrosion modifying agents used for covering metallic surfaces without their preliminary cleansing from corrosion products. The corrosion modifying agent comprises the following components, wt.-%: hydrolysis lignin, 19-23; oil as by-side product in caprolactam manufacturing, 5-10; thermic ortho-phosphoric acid in the concentration 70%, 17-26, and water, balance. Invention provides preparing a composition transforming rust corrosion with layer thickness up to 160 mcm that provides enhancing adhesion of applied paint and varnish materials after treatment with the proposed modifying agent significantly.
EFFECT: improved and valuable properties of agent.
FIELD: chemical industry; mechanical engineering; extractive industry; heat and power industry; other industries; methods of protection and recovery of the of the corroded metallic surfaces.
SUBSTANCE: the invention is pertaining to the method of protection and recovery of the corroded metallic surfaces working in conditions of the abrasive wear, action of the aggressive mediums, for example, at transportation of the fertilizers, in the heat and power industry, chemical industry and the extractive industry at the repairs of the rust through equipment. The method provides, that at first they apply on the metallic surface of the priming coating based on the composition containing the following components (in mass. %): 20.0-30.0 - the epoxy dian resin with the epoxy reacting weight of 450-500, the curing agent, 12.0-25.0 - pigments, 12.0-25.0 - fillers, 20.0-30.0 - polyamide curing agent Versamid 115, the rest - organic solvents, with the subsequent drying "up to detachment". After that they apply the second insulating layer having the following composition (in mass %): 20.0-35.0 - of the epoxy dian resin with the epoxy reacting weight of 450-500, 5.0-10.0 - pigments, 5.0-12.0 -fillers, 20.0-35.0 - polyamide curing agents Versamid 115, 10.0-30.0 - micaceous iron oxides, the rest - the organic dissolvents, with the subsequent "up to detachment". After that they apply the third outer layer from the composition containing the following components (in mass %): 20.0-40.0 - the acrylic or polyester hydroxyl-containing resin used as the binder, 10.0-20.0 - pigments, 5.0-10.0 - fillers, 11.0-22.0 - the curing agent - aliphatic polyisocyanate, 0.1-0.5 - the organically modified polysiloxane, the rest - the organic solvents, further the product is dried up to the complete solidification. The invention allows to increase the corrosion resistance of the coating.
EFFECT: the invention ensures the increased corrosion resistance of the coating.
1 tbl, 2 ex
FIELD: priming compositions for protection of metal surfaces working under atmospheric conditions against corrosion; application of primers and coats.
SUBSTANCE: proposed primer-enamel paint includes the following components, mass-%: 40.0-60.0 of epoxy diane resin,; 5.0-15.0 of 50-% polyvinyl acetate dispersion and 0.2-2.0 of synthetic oligopiperylene rubber used as film-forming agents, 0.03-0.1 of polyoxyethylene alkyl phenol ester used as surfactant; 2.0-5.0 of chromium (III) oxide, as well as 2.0-5.0 of aluminum hydroxide and 2.0-5.0 of cardinal red used as anti-corrosion pigments, 8.0-12.0 of polyethylene polyamine used as hardening agent, 0.3-0.7 of dibutyl phthalate used as plasticizing agent, 1.0-10.0 of butyl cellosolve used as cosolvent, 0.01-1.0 of orhto-phosphoric acid used as modifying additive, water, up to 100.
EFFECT: improved quality of coat; enhanced resistance to oils, gasoline, lubricating and cooling fluids and aggressive media.
2 tbl, 16 ex
FIELD: protecting materials.
SUBSTANCE: invention relates to priming compositions used for anticorrosive covers applied on surface of mainly ferrous metals in machine engineering, and woody and other materials. The priming composition comprises lacquer GF-01, red pigment, siccative, solvent, chalk of sort M-5 and lecithin as a disperser, siccative NF-1 as a siccative, and slime after dry scrubbing in electric steel melting production of the following chemical composition, wt.-%: SiO2, 7.76; phosphorus (P), 0.041; chrome (Cr) total, 1.0; Al2O3, 0.93; TiO2, 0.099; MnO, 2.29; CaO, 21.3; MgO, 24.5; FeO, 3.91; Fe2O3, 32.02; CaF2, 5.26; CaO (incompletely burned material), 0.89 in the following granulometric composition of slime, %: below 20 mcm, 15; from 20 to 25 mcm, 60, and from 25 to 100 mcm, 25. Invention provides decreasing cost and enhancing exploitation parameters of the priming in coating the broad spectrum of surfaces in machine engineering and building.
EFFECT: improved and valuable properties of priming composition.
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.
SUBSTANCE: invention concerns method of protection and recovery of corroded metal surfaces operating in abrasive wear conditions and aggressive media, e.g. in fertiliser transportation, and can be applied in power-producing, chemical and mining industry for rusted equipment repair. Method involves application of primer layer on metal surface with further drying till aftertack, insulation layer with further drying till aftertack, and external layer with further drying to complete hardening. Primer layer is made of composition including the following components, wt %: 20.0-30.0 of epoxy diane resin with epoxy equivalent weight of 450-500, 15.0-25.0 of Versamid 115 polyamide solidifier, 12.0-25.0 of pigments, 12.0-25.0 of fillers, 2.0-5.0 of amine-containing Cardolite NC 562 solidifier based on 3-n pentadecanylphenol, the rest is organic solvents. Insulation layer is made of composition including the following components, wt %: 20.0-35.0 of epoxy diane resin with epoxy equivalent weight of 450-500, 15.0-30.0 of Versamid 115 polyamide solidifier, 5.0-10.0 of fillers, 10.0-50.0 of micaceous iron ore, 2.0-5.0 of amine-containing Cardolite NC 562 solidifier based on 3-n pentadecanylphenol, 0.8-1.2 of structurising additive, the rest is organic solvents. External layer is made of composition including the following components, wt %: 20.0-40.0 of acrylic or polyether hydroxyl-containing resin, 11.0-22.0 of aliphatic isocyanate solidifier, 10.0-20.0 of pigments, 10.0-40.0 of micaceous iron ore, 5.0-10.0 of fillers, 0.2-0.6 of polysiloxane modified organically, 0.8-1.2 of structurising additive, 0.6-2.4 of aluminum powder, the rest is organic solvents. Composition of external layer includes additionally Metatin Catalyst tin dibutyllaurate in amount of 0.05-0.5 wt % as drying accelerator.
EFFECT: enhanced corrosion resistance of coating.
cl, tbl, 2 ex