Method for manufacturing kitchenware piece with internal surface of silver or silver alloy

FIELD: food industry.

SUBSTANCE: method for manufacturing a kitchenware piece includes shaping the kitchenware piece made of a ferrous metal, surface hardening, oxidation and polishing, while the inner surface of the kitchenware piece is coated with silver or a silver-based alloy by electroshaping.

EFFECT: method ensures antibacterial and antiviral properties of dishes and increased thermal conductivity, allowing to cook food at a temperature below the splitting threshold of oils and fats, prevents food adhesion during cooking and facilitates its detachment from the surface of the items.

13 cl, 6 ex, 2 dwg



Same patents:

FIELD: medicine.

SUBSTANCE: method for making implants involves multilayer plasma spraying of biologically active coating onto metallic substrate of implants; titanium is sprayed remotely as first and second layers; the third layer represents a mechanical mixture of titanium powder and hydroxyapatite, while the fourth layer is formed of hydroxyapatite. The implants with the multilayer biologically active coating is placed in a container with silver nitrate solution with the concentration of 0.04% AgNO3 placed in an auxiliary water tank, and the sprayed multilayer biologically active coating is exposed to ultrasound for 35 seconds at ultrasound intensity 9.6 W/cm2 and frequency 22 kHz.

EFFECT: invention enables making implants having the coating promoting fast and reliable osteointegration of the implant with biological tissues, and possessing bactericidal effect.

2 cl, 2 dwg, 1 tbl

FIELD: metallurgy.

SUBSTANCE: solution contains the following component ratio: nitric-acid silver 6-8 g/l, triethanolamine 225 - 300 ml/l, xylite 22 - 30 g/l, formalin 40 ml/l, distilled water up to 1 l, and its has pH value equal to 9-10.

EFFECT: solution allows increasing thickness of a chemical silver coating obtained on parts from copper alloys.

3 ex

FIELD: metallurgy.

SUBSTANCE: invention refers to chemical application of metal coating. The procedure consists in bringing substrate into contact with a bath containing a surface active substance, reducer and metal chosen from a group Ag, Cu, Pd and Co. Also temperature of the bath is higher, than temperature of dimness of solution present in the bath in form of at least two phases. The bath contains water solution of silver salt, substituted alkylene-oxide compound, boric acid, reducer and complex former. The procedure includes silicon surface etching, immersion of silicon surface into the above described bath, leaving silicon surface till silver coating forms on it and extracting silicon surface coated with silver from the bath.

EFFECT: increased visual reflex and electrical conductivity.

34 cl, 2 ex

FIELD: metallurgy.

SUBSTANCE: invention relates to application of coatings from noble metals, particularly to platinum and iridium on ceramic and can be used for receiving of protective coatings with high chemical stability in liquid and gaseous corrosive medium. Method includes application of coating on preliminary degreased and activated surface of product by means of chemical reduction of metal from water solution, containing ammonia complex of metal and 0.56 g/l potassium hydroxide, at temperature 170 - 210 C in confined space during 130 - 180 min., herewith used aqueous solution is previously vacuumised during 20 - 30 min. and is saturated by nitrogen for removing of molecular oxygen. In the capacity of metal complex it is used tetramin platinum chloride (II) or pentammin iridium chloride (III), which are taken from consideration 0.003 g of metal per 1 cm2 of product surface, herewith operation of chemical reduction of metal is replicated multiple. After each two sequential operations of chemical reduction of metal product is heated at 550 - 650 C during 4 h.

EFFECT: invention provides receiving of solid, uniform, temperature-stable, plastic coating of platinum or iridium of thickness up to 5 mcm on ceramics.

2 cl, 7 ex

FIELD: metallurgy.

SUBSTANCE: inventions relate to field of coating from gold and its alloys on metallic details without current application with usage of compositions, not containing cyanides and other noxious reactants. Method includes defatting, chemical etching, activation, washing and treatment of prepared details by composition for coating. Activation of details is implemented by treatment by composition, containing, wt %: chloroaurate hydrogen acid 0.1-0.3, silver chloride 0.05-0.2, cobalt chloride 0.1-0.3, sal ammoniac 0.1-0.5, propylene carbonate 5-22, dimethyl sulfoxide - the rest, at temperature 70-90 C during 30-90 seconds, and coating is implemented by treatment of prepared details by composition, containing, wt %: gold halogenide or chloroaurate hydrogen acid, in accounting to metal 0.1-0.5, sal ammoniac 0.2-1.0, boric acid 0.1-1.5, sodium nitrite 0.1-0.5, and/or cobalt chloride 0.1-1.0, and/or metal chloride, forming alloy with gold 0.1-2.0, propylene carbonate 5-22, dimethyl sulfoxide - the rest. Additionally details during the activation process and coating is joggled at a rate 60-90 oscillations per minute.

EFFECT: invention provides creation of reliable and ergonomic method of coating from gold and its alloys on metallic details with ability of detail surface activation, including with sublayer of chemical nickel, composition, accelerating process of growing of gold coating with possible intensification of process at ecologically friendly no-current gilding of details of complex shape, including allowing sublayer of chemical nickel, with receiving of coating of thickness up to 1,5 mcm.

3 cl, 1 tbl, 9 ex

FIELD: application of coatings of palladium and its alloys with noble metals such as silver, gold, platinum, rhodium, ruthenium and with some non-noble metals such as copper, antimony, bismuth, tin, lead, nickel, possibly in microelectronics, electrical engineering, electrochemical systems.

SUBSTANCE: method comprises steps of degreasing, chemical etching and(or) activating, washing out and treating articles with plating solution of cyan free salts of applied metals such as nitrates, halides in organic solver selected from alkyl phosphates, sulfur-containing solvent, acidic acid and (or) propylene carbonate at temperature 20 - 150°C. Ammonium chloride, bromide or rhodanide and also monohydric or multihydric alcohol is added to plating solution.

EFFECT: possibility for applying thin-layer high adhesion strength coatings of palladium and its alloys upon metallic parts at controlling thickness of coating, its physical and chemical properties, increased wear resistance of parts in different conditions.

2 ex, 2 tbl

The invention relates to a method of coating with noble metals metal products

The invention relates to the field of deposition of thin metal coatings on metal parts, specifically for the application of gold, silver, platinum, palladium, Nickel, mercury, indium, bismuth and antimony, and can be used in microelectronics, electrical and reflective devices, and also in the jewelry industry

The invention relates to compositions for obtaining coverage and can be applied in the technology of coatings on inorganic materials and metals

The invention relates to the field of chemical methods for applying coatings of noble metals, can find application in the electronics industry, powder metallurgy, petrochemistry when applying a silver coating to products of different materials

FIELD: personal use articles.

SUBSTANCE: invention relates to a cooking device, in particular, to a cooking boiler, for example, to a kettle, pan or saucepan including a lower part applicable for heating by an induction method. According to the conventional technical solutions, connection of a ferromagnetic plate, placed on the bottom, to the base container is multi-operational, requires exceptional accuracy and/or does not ensure reliability. Additionally, according to the conventional technical solutions, one uses stainless steel application whereof has certain disadvantages. According to the present invention, the ferromagnetic element is represented by a plate, at least one surface whereof is coated with another material, in particular, with aluminium. The ferromagnetic element is connected to the base container with the help of, for example, welding under pressure. According to the technical solution ensuring the present invention, the ferromagnetic material may be represented by a steel plate.

EFFECT: design improvement.

15 cl, 6 dwg

FIELD: personal usage articles.

SUBSTANCE: invention relates to kitchenware and to such kitchenware manufacture method. The kitchenware contains a hollow metal body consisting of a bottom and a side wall. The body has a concave inner side and a convex outer side. Sequentially applied on the inner side are a solid base layer and a nonstick coating. The nonstick coating contains at least one layer containing at least one fluorocarbon polymer. The polymer(s) form(s) a continuous sintered grid. The solid base layer is a layer that has discontinuities at the low strength section spot. The solid base layer is made of a ceramic and/or metal and/or polymer material in the form of surface dispersion of drops of the said material uniformly distributed across the said inner side at the low strength section spot. The partial overlapping degree is equal to 30-80% of the surface to be coated. The drop size is 2 - 50 mcm.

EFFECT: kitchenware properties improvement.

18 cl, 3 dwg

FIELD: personal use articles.

SUBSTANCE: invention relates to kitchen utensils. The item comprises a metal housing (2) which contains a concave inner surface (21) intended for the location from the side of the food, curved outer surface (22) intended for the location closer to the heat source. And on the said inner surface sequentially starting from the said housing (2), the enameled solid base (3) is applied, which is rough and does not contain lead and cadmium, and then the non-stick coating (4) covering the said solid layer (3). The present invention also relates to a method of manufacturing such item (1).

EFFECT: invention enables to obtain a non-stick coating with good properties of adhesion to the housing and the corrosion resistance properties.

21 cl, 2 dwg, 3 tbl, 9 ex

FIELD: personal use articles.

SUBSTANCE: invention relates to kitchen utensils. The kitchen utensils comprises a metal casing (1b), including the bottom coupled with an insert (1a) made of a harder metal than the metal casing, and which is usually fastened with it through the perforations or teeth, providing a rigid connection (231, 310). Around the perforated or toothed area (231) of the insertion (1a) there is a zone (25) of a continuously solid slightly protrusive peripheral support surface in the form of a crown in the said harder metal. The insertion is rigidly fixed in the form of a flat plate or a capsule. Also a method of manufacturing of kitchen utensils is claimed.

EFFECT: group of inventions enables to improve the thermal and mechanical properties of the utensils bottom in the process of induction heating.

18 cl, 12 dwg

FIELD: personal use articles.

SUBSTANCE: invention relates to hob for food products used in kitchen appliances or in cooking devices. Hob represents a surface containing at least 30% of niobium.

EFFECT: easier cleaning of hob due to reduced sticking of food products to it.

FIELD: food industry.

SUBSTANCE: frying surface is made from a composite material in the form of an alloy containing two main components - zirconium and cobalt. The substrate underlying the surface for products frying consists of one or more metal sheets from aluminium, a corrosion resistant alloy, cast iron, steel or copper. The composite material is applied by physical precipitation from vapour phase with one or more massive targets usage. After the composite material applying, one performs azotisation with further carburisation or cyanidation.

EFFECT: thery is produced a surface for frying with improved characteristics which provide for easy cleanability of the surface for a long time; the surface has high corrosive resistance and improved mechanical properties.

7 cl, 1 tbl

FIELD: personal utensils.

SUBSTANCE: invention pertains to kitchenware. Kitchenware consists of the metal base and nonstick coating. Nonstick coating is placed over the metal base. Nonstick coating has two layers on the bases of fluorocarbon resins. One of the two above said layers is made intermittent, formed by patterns. Any cross section of the layers is discontinued, and square are of each of the patterns is not less than 1 mm2. Invention insures presence of nonstick coating with enhanced resistance to scratching and preserving its nonstick capabilities preventing cracking, and reduced material consumption.

EFFECT: secured nonstick coating with enhanced resistance to scratching and preserving its nonstick capabilities preventing cracking, and reduced material consumption.

10 cl, 3 dwg

FIELD: household goods and personal effects.

SUBSTANCE: working surface, used in the kitchen utensils or in the boiling/frying appliances, is a metallic compound, which consists, in weight ratio, from more than 50% of cobalt and at least 18% of chrome.

EFFECT: surface is more tolerant to mechanical effects, more durable and easily cleaned.

11 cl

FIELD: household goods and personal effects, crockery.

SUBSTANCE: proposed invention is related to cooking surface for food to be used in dishware or cooking device. Cooking surface is manufactured from metal alloy of zirconium with, at least one other metal. Besides, zirconium content in this alloy will be at least 75%. Technical result of the claimed invention is troubleshooting of previous facilities and improvement of corrosion resistance and cleaning easiness.

EFFECT: improvement of corrosion resistance and cooking crockery cleaning easiness.

10 cl, 1 tbl

FIELD: household goods and personal effects, crockery.

SUBSTANCE: proposed invention is related to kitchen appliances and used for cooking. The essence of invention is application of nephrite as a material for working surface for food cooking.

EFFECT: improvement of heat transfer in working surface for cooking.

FIELD: food industry.

SUBSTANCE: tank comprises base made of a multi-layered material, side made of multi-layered material arranged in the direction from the outer side of the tank to its inner side, outer section which is made of a layer of nickel-based ferromagnetic alloy whose Curie point ranges from 30 to 350 C and heat expansion coefficient is at least 6,5·10-6K-1, and core that composed of at least single-layered material made of aluminum, aluminum alloy, and copper.

EFFECT: improved corrosion protection.

2 cl, 13 dwg