Phosphate composition

 

(57) Abstract:

Phosphatizing composition refers to the technology of surface treatment of metal products and can be used for processing pipelines, cooling towers, nuclear power plants before colouring, contains, by weight. % : orthophosphoric acid 33,0 - 35,0; ethyl alcohol of 7.5 - 8.5; butyl alcohol 0,7-1,0; hydroquinone 0,09 - 0,11; water with hardness not more than 4 mgecw/l the rest. The technical result - adhesion comprehensive coverage, score - 1 resistance to 3% NaCI, dried unchanged 275-366, resistance to cycles of "the tropics", cycles 17-27. table 2.

The invention relates to the technology of surface treatment of metal products before application of paints and can be used, for example, processing pipelines, cooling towers, nuclear power plants before painting.

Known compositions for sinkpositive, such as CFA-2, KF-1, PMC-1 (OST 113-25-36-82, THE 113-08-620-87, THE 113-07-45-07-88).

For rubezhom these compounds are known as Apply 125, 680 (Germany), Apply 183 firms ICalendar (Italy), Autobond, Fastbond 28 (USA) (Industrual Finishing, 1978, 54, N 4, p.59, p. 57)

These compositions are aqueous solutions of phosphoric, nitric acid, oxide or zinc salts, salts of Nickel, manganese, etc.

On the surface of metal products, processed the specified composition, forms a crystalline layer of phosphates of zinc, iron and other salts.

The compositions are applied by methods of dipping, spraying, and to accelerate the deposition process is conducted electrolytic phosphating /Auth. mon. 1346699/.

Thus synchopation requires pre-treatment of metal surfaces: mechanical, blasting, chemical etching.

Known composition containing phosphoric acid, ethyl alcohol, butyl alcohol, hydroquinone and water, which is selected as a prototype (Popilov L. J. New materials for shipbuilding, L, Shipbuilding, 1972, S. 446-447).

The composition is used to remove rust and residual mineral oil from metal surfaces before painting. After two minutes of processing it is easily washed off with hot water, after which the surface is neutralized.

An object of the invention is to increase the protective properties of the paint coating.

The problem is solved in that the composition containing ortho the ri, the following ratio of the components, wt.%:

phosphoric acid - 33,0 - 35,0

ethyl alcohol - 7,5 - 8,5

butyl alcohol - 0,7 - 1,0

hydroquinone - 0,09 - 0,11

water with hardness not more than 4 mgecw/l - rest

As orthophosphoric acid using thermal phosphoric acid according to GOST 9980, alcohol use ethyl technical.

The composition has the following characteristics:

density g/cm3at 20oC 1,01 - 1,13;

conditionally total acidity 25,00 - 30,00;

the relative total acidity free acidity 1,90 - 2,05;

the density of the phosphate coating, g/m22,00 - 3,50;

the temperature of the solution during processing,oC +5 - +35;

during the formation of the phosphate layer 3 min - 12.

The use of the composition gives the opportunity to opt-out pre-treatment: mechanical Stripping, obtirania, as well as from priming, which is very important in conditions of nuclear power plants.

The composition is applied by means of air spraying, dipping, wiping. The process is carried out as follows: the first stage consists in loading parts and equipment, which are coated with the composition, in the second stage, carry out the chemical treatment, the third stage catches the solvent for 3 to 12 min, Bristo gray to black and steel depending on the thickness of the oxide film, rust and corrosion depth of the lesions.

In table. 1 shows the formulations of the compositions and their characteristics.

In table. 2 shows properties of coating systems using the proposed phosphate composition: resistance to 3% NaCl according to GOST 9.403-80, the weathering cycles "tropics" according to GOST 9.401-89, adhesion at the points according to GOST 15140-78.

In examples 1 to 3 described the technique in the following sequence:

the first layer - coating phosphate composition, the density of the phosphate layer is maintained in the range, g/m2, from 2.0 to 3.5;

the second layer - enamel EP-437 thickness of 0.5 μm, the drying time to degree 3 - 25-27 hours. (Technological regulations enamel EP-437 N 44-88).

Example 4 illustrates the use of nudemaniladating water with hardness 7-10 mgkm/l in phosphate composition, example 5 prototype.

Enamel EP-437 in examples 4 and 5 produced as in examples 1 - 3.

The proposed coating systems instead of epoxy enamels can be used alkyd-melamine, silicone and other enamels.

Phosphating composition comprising phosphoric acid, ethyl alcohol, butyl alcohol, hydroquinone and water, otline, wt.%:

Phosphoric acid - 33,00-35,00

Ethyl alcohol - 7,50-8,50

Butyl alcohol - 0,70-1,00

Hydroquinone - 0,09-0,11

Water with hardness not more than 4 mgecw/l - Rest

 

Same patents:

The invention relates to the field of paints and varnishes, and in particular to compositions of phosphate primers

Primer composition // 2099374
The invention relates to the field of polymeric compositions used as a primer coating for insulation of pipes in the factory by extrusion coating to the primed pipe surface melt of polyethylene

Primer composition // 2089582

The invention relates to low-toxic, does not contain chromates, anti-corrosion primers under urethane, Acrylonitrile, acrylic and epoxy coatings for corrosion protection of aircraft products

The rust converter // 2086592
The invention relates to coatings industry, namely, modifiers rust, which are used for coating metal surfaces without cleaning them from rust

The invention relates to the protection of metals from corrosion and can be used in aircraft construction, mechanical engineering other industries for corrosion protection of aluminum and its alloys

The invention relates to paints, varnishes and lacquers, namely primer waterborne compositions intended for the protection against corrosion of metal surfaces operating at atmospheric conditions

Modifier corrosion // 2055847
The invention relates to coatings industry, namely, modifiers, corrosion, used for surface coating of metal products like non-ferrous and ferrous metals without cleaning them from corrosion products

The invention relates to the protection of metals from corrosion by corrosion coatings

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.

1 tbl

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.

4 ex

Rust transformer // 2286999

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.

3 tbl

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

Priming composition // 2322467

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.

5 tbl

FIELD: chemistry.

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.

1 tbl

FIELD: chemistry.

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

Up!