150 results about "Zinc aluminium" patented technology

The invention relates to a watery zinc-aluminium heavy-duty coating in a compounding squama shape and a preparation method thereof. The watery zinc-aluminium heavy-duty coating belongs to a bi-component coating and is prepared from organic-inorganic modified base stock and pigment according to a certain proportion by weight, wherein the organic-inorganic modified base stock contains silica sol, potassium hydroxide, silicone-acrylate emulsion, a pigment dispersing agent, a film forming addition agent and an antifoaming agent, and the balance is deionized water or distilled water; the pigment comprises squama-shaped zinc powder and squama-shaped aluminium powder; and the weight ratio of the organic-inorganic modified base stock to the pigment is 5: 1-2. The watery zinc-aluminium heavy-duty coating contains no chrome, can be solidified at the normal temperature, has environmental protection and low energy consumption and can be used for preparing thin coatings with high corrosion resistance, and the like.

The present invention provides a preparation method of methanol synthesis catalyst. The catalyst has the preparation technical process as follows: firstly, copper-zinc coprecipitate is prepared; secondly, zinc-aluminium coprecipitate with a spinel structure is prepared; thirdly, copper-aluminium coprecipitate is prepared; then three coprecipitates are mixed and aged and then are washed, dried and calcined; graphite is added into calcined material to be tabletted into the methanol synthesis catalyst. In weight percentage, the catalyst prepared by the present invention consists of 25 percent to 65 percent of CuO, 15 percent to 45 percent of ZnO and 5 percent to 15 percent of Al2O3. The activity and the heat resistance of the catalyst prepared by the present invention are better than that of the catalyst prepared by the prior technical production method.

A method for preparing scale type zinc-aluminium powder by wet high energy ball milling comprises the following working procedures: (1) ball milling; (2) primary suction filtration; and/or (3) pasty product packing; (4) cleaning; (5) secondary suction filtration; (6) baking; (7) dispersion; and/or (8) dry powdery product packing.

The invention discloses a high-corrosion-resistant water soluble zinc aluminium multielement alloy-based nano anticorrosion paint as well as a preparation method and application thereof and belongs to the technical field of metal surface anticorrosion paints. The high-corrosion-resistant water soluble zinc aluminium multielement alloy-based nano anticorrosion paint comprises the following components in percentage by weight: 15-30wt% of Zn-Al-based multielement alloy powder, 0.5-2wt% of modified nano powder, 2.5-20wt% of methyl alcohol, 6-12wt% of sintering protective agent, 0.5-1.5wt% of titanate coupling agent, 1.8-3.6wt% of non-ionic surface active agent, 0.9-1.8wt% of corrosion inhibitor, 1-3wt% of adhesive force enhancer, 0.4-0.65wt% of thickener, 0.05-0.1wt% of defoaming agent and the balance of deionized water, wherein the Zn-Al-based multielement alloy powder is in a scale shape, the scale diameter is less than 20 micrometers, and length-diameter ratio is more than 30. The high-corrosion-resistant water soluble zinc aluminium multielement alloy-based nano anticorrosion paint is more uniform in Zn-Al element distribution in micro scale and has high corrosion resistance, wear resistance and erosion resistance.

The present invention relates to a zinc-aluminium embedding copenetrating method of iron and steel products and its penetrant. Its method includes the following steps: embedding iron or steel product in the penetrant, heat-insulating treatment for 3-10 hr at 400 to 600 deg.C, then a zinc-aluminium copenetrated layer with double-layer structure whose external layer is enriched with aluminium and internal layer is enriched with zinc is formed on the surface of iron or steel product, so that the iron or steel product can have more excellence anticorrosion property and resistance to abrasion.

The present invention is RE containing Zn-Al alloy wire and its preparation process, and the RE containing Zn-Al alloy is used as the end spraying material for metallized film capacitor. The RE containing Zn-Al alloy contains Al 4-16 wt%, RE mixture with light RE as main components 0.01-0.12 wt%, and impurity not more than 0.025 wt% except Zn. The preparation process includes pouring Al molt into Zn molt, raising the temperature for melting while stirring, adding intermediate RE alloy, and smelting while stirring to obtain the RE containing Zn-Al alloy. The RE containing Zn-Al alloy wire of the RE containing Zn-Al alloy has compact structure, improved machining performance and use performance, and improved welding condition.

The invention provides a preparation method of a zinc-aluminium seamless flux-cored wire. The method provided by the invention is characterized by comprising the following steps: smelting raw materials such as zinc, aluminium and the like, and casting the melt into an ingot; after riser removal and scalping, putting the ingot into a nitrogen protection furnace and carrying out shpheroidizing annealing in the nitrogen protection furnace at 180-230 DEG C for 1-2 hours; blending a core flux into paste by virtue of an organic solvent and filling the paste in a pressure injector; then putting the zinc-aluminium alloy ingot into a dedicated extrusion die, connecting the die to the pressure injector, and starting the extrusion die to directly extrude welding wire which has the diameter phi of 5.0-12.0mm and has a core of the flux and a sheath of the zinc-aluminium alloy; and then performing drawings many times to obtain the finished product. The flux-cored wire manufactured by the method is characterized in that the flux is filled continuously and evenly; during the use process of the flux for welding, no welding slag is left, no carbon is deposited, the operation is convenient, and the production efficiency is high, therefore, the problems such as complex processing steps, high cost and the like in the prior art are solved.

A wet technology for preparing the flaky powder of zinc or Zn-Al alloy includes such steps as proprotioning non-flake powder of zinc or Zn-Al alloy, solvent, assistant and medium, ball grinding, polishing, classifying and solid-liquid separating. Its advantages are short time of ball grinding, high antioxidizing nature, high diameter/thickness rate, and high granularity uniformity.

The invention relates to a water base non-chrome zinc-aluminium coating and methods for preparing and using the same. The coating is prepared by proportionally mixing a component A and a component B; the component A contains 50-150g/L of lamellar metal powder, 145-290ml/L of organic solvent, 10-200ml/L of deionized water, 10-36ml/L of reducing agent and 5-15ml/L of wetting agent; and the component B contains 60-240ml/L of deionized water, 20-75ml/L of binding agent, 8-22ml/L of thickening agent, 4-8ml/L of silicon compound and the balance of the organic solvent. The method for preparing the water base non-chrome zinc-aluminium coating comprises the steps of: weighing the lamellar metal powder proportionally to be mixed uniformly, and then adding the organic solvent to be mixed uniformly for later use; mixing the reducing agent with the wetting agent, adding an appropriate amount of the deionized water to be mixed uniformly, and then adding the lamellar metal powder liquid to prepare the component A; proportionally weighing the thickening agent, the binding agent and the silicon compound, and adding the organic solvent to be mixed uniformly to prepare the component B; and mixing the prepared component A and the prepared component B according to the ratio of 2:1, and stirring unit uniform, thus obtaining the coating. The method for using the water base non-chrome zinc-aluminium coating is that the coating is coated on a part to be treated, and the baking temperature is increased to 360 DEG C so as to solidify and crosslink the coating to form a dense protective layer. The coating has the corrosion resistance which reaches 840 hours of a neutral salt spray test and over 96 hours of a heat resistance test, the usage amount of harmful substances is greatly reduced, and the working environment is improved.

The invention relates to an aluminium alloy engine cast iron cylinder sleeve processing technology. An HT250 cast iron cylinder sleeve is immersed in a plating auxiliary with the temperature ranging from 60 DEG C to 70 DEG C after surface treatment, so that plating assistant processing is conducted on the surface of the HT250 cast iron cylinder sleeve for 6-10 min in the plating auxiliary, and then drying is conducted; the HT250 cast iron cylinder sleeve is placed in zinc-aluminium alloy melt for hot dipping after plating assistant processing, and cooling is conducted; then the HT250 cast iron cylinder sleeve is placed in aluminium alloy melt for hot dipping; the HT250 cast iron cylinder sleeve plated with aluminium alloy is taken out, and aluminium alloy melt casting is conducted; cooling is conducted, mould opening is conducted, and aluminium alloy engine cylinder body composite materials are taken out. According to the technology, the cast iron cylinder sleeve is processed through the prepared plating auxiliary, two steps of hot dipping and the composite casting technology are combined to achieve more than 99.9% of metallurgical bonding between ZL101A aluminium alloy and HT250 cast iron, and the aluminium alloy engine cast iron cylinder sleeve processing technology is simple, practical, low in cost and prominent in effect.

The invention provides a low melting point flux for hot dip plating. The flux is characterized by comprising the following components: 80-140g/L of zinc chloride, 0-30g/L of sodium chloride, 5-20g/L of sodium fluoride, 10-40g/L of aluminium chloride, 5-15g/L of sodium bicarbonate, 0.2-3g/L of composite surfactant and the balance water. The melting point of the flux can be lowered, the time of slag floating is controlled in 90 seconds, the efficiency of the interface reaction between flux salt film and liquid zinc is increased, the wettability between a metal part matrix to be plated and liquid zinc is improved, and the rate of skip-plating is reduced. The rate and degree of the reaction between aluminium in zinc-aluminium alloy liquid and the other chlorides in the flux can be reduced, wherein aluminium chloride is prepared by the reaction; the flux can help the aluminium content of the alloy liquid to be stabilized to a certain extent; and the application range of the low melting point ammonia-free complex salt flux can be expanded in the hot dip plating technological process of the zinc-aluminium alloy liquid, and the stability of the flux can be increased.

The invention relates to a methanol to aromatic catalyst containing two molecular sieves and a preparation method. The methanol to aromatic catalyst comprises, based on the weight of the catalyst, 40 wt%-85 wt% of the total content of a zinc-aluminium compound modified ZSM-5 molecular sieve and a nickel modified Y-shaped molecular sieve, 0.5 wt%-5.0 wt% of rare earth oxide and the balance aluminium oxide binder, wherein the ratio of the weight content of the zinc-aluminium compound modified ZSM-5 molecular sieve to the modified Y-shaped molecular sieve is 9:1-1:1. The invention further discloses a method for preparing the catalyst. The methanol to aromatic catalyst is used in a methanol to aromatic process, has high light weight aromatic yield and is low in dry gas and liquefied gas productivity. The wastage rate of zinc oxide active components of the catalyst is low, and the stability is high.

The invention discloses a green corrosion inhibitor for hot-dip zinc-aluminum alloy steel and an application thereof, wherein a main component of the green corrosion inhibitor is vitamin B1. The application is that: a pickle of dilute hydrochloric acid or dilute sulfuric acid having a concentration of 0.1M to 2M is added with the corrosion inhibitor within a concentration range of 0.01kg/m3 to 0.2kg/m3, the temperature being controlled to be maintained at a room temperature of about 25 DEG C, and zinc, zinc-aluminum alloy or hot-dip zinc, zinc-aluminum alloy coating steel for pickling are added and submerged for 0.5h to 3h. Products of the invention are applied to industrial pickling of zinc, zinc-aluminum alloy or hot-dip zinc, zinc-aluminum alloy coating steel and products thereof, allowing an avoidance of general corrosions and local corrosions of metal or coatings during a pickling process. As few researches on similar pickling corrosion inhibitors are taken at present, the product has significant advantages of low price, low dosage, high corrosion inhibition efficiency and good ability of continuous reaction. The product of the invention is a natural plant extract, which is nontoxic and harmless to environment and creatures, fitting the developing trend of pickling corrosion inhibitors and providing a promising application prospects.

The invention discloses a zinc-aluminium based coated steel sheet, a manufacturing method thereof, a thermoforming method and a component. After hot press forming, the strength of the steel sheet is greater than 1500 MPa, and the elongation is greater than 5%. A coating is completely transformed into a ferroalloy layer, no evaporation of the coating is generated, no liquid-phase erosion phenomenonis generated, and no hard Fe-Al intermetallic compound is generated. The structure of the component is martensite, ferrite, and retained austenite.

A process for attaching an indium layer on the surface of zinc aluminium oxide ceramic target includes preparing silver slurry from silver oxide, 70-80 % wt, SiO2 10-15 % wt. and turpentine 10-20% wt, spraying it on the surface of said target, drying, heating at 550-580 deg.C for 15 min, cooling heating to 180-220 deg.C, spraying indium powder to smelt it. Its advantage is low cost.

A catalyst including cobalt, zinc oxide and aluminium is described, having a total cobalt content of 15-75% by weight (on reduced catalyst), an aluminium content ≧10% by weight (based on ZnO) and which when reduced at 425° C., has a cobalt surface area as measured by hydrogen chemisorption at 150° C. of at least 20 m²/g cobalt. A method for preparing the catalyst is also described including combining a solution of cobalt, zinc and aluminium with an alkaline solution to effect co-precipitation of a cobalt-zinc-aluminium composition from the combined solutions, separating of the co-precipitated composition form the combined solutions, heating the composition to form an oxide composition, and optionally reducing at least a portion of the cobalt to cobalt metal. The catalysts may be used for hydrogenation reactions and for the Fischer-Tropsch synthesis of hydrocarbons.

The invention discloses a manufacturing method for polymer/ foam allumen composite material. It includes the following steps: making foam allumen, and infiltrating high molecular material into the holes of allumen. The invention sharply improves the damping performance comparing with single identity allumen orsingle foam allumen.

A high-Zn and-Al REMg alloy contains Zn (7-14 wt.%), A (3-8), RE (0.3-1.5) and Mg (rest). It is prepared through smelting in electric crucible furnace while covering with Mg alloy. It has fire point temp of more than 740 deg.c, tension strength (200-260 MPa) and elongation (1.4-3%).

The invention provides a medium-temperature brazing method of dissimilar metals of titanium and aluminium under the atmospheric condition. The medium-temperature brazing method comprises the following key points of: before brazing, firstly carrying out hot-dip aluminum plating on a titanium plate, forming an aluminium-plating layer with certain thickness on the surface of the titanium plate, then preparing a zinc-aluminium brazing material melting layer on the surfaces of the aluminium-plating layer of the aluminium plate and the titanium plate by a mechanical scratching and melting method, and then carrying brazing connection. The medium-temperature brazing method provided by the invention has the advantages that oxidation films are removed by mechanical scratching, so that the zinc-aluminium brazing materials can be wet and spread on the surfaces of the aluminium-plating layers of the aluminium plate and the titanium plate to form uniform melting, and brazing materials do not need to be added in the following brazing process; due to lower brazing temperature, a large amount of titanium-aluminium friable intermetallic compounds on the interface can be limited from generating to a certain extent, and further the toughness of joints is improved; the medium-temperature brazing method is simple and easy in operation, can be carried out under the atmospheric condition, does not need special atmosphere for protection and is suitable for practical engineering application.

The invention discloses a zinc base alloy used for hot galvanizing on a steel wire. The zinc aluminium alloy comprises the following components in percentage by weight: 4.5-5% of aluminium, 0.02-0.04% of magnesium, 0.003-0.005% of strontium, 0.001-0.002% of indium and the balance of zinc. By adopting the zinc aluminium alloy disclosed by the invention, once alloy plating weight can reach 420-450g/m<2>, and the coating is compact and uniform and has good corrosion resistance.

The invention discloses a solid base catalyst. The solid base catalyst is structurally prepared from a carrier and an active component loaded on the carrier; the active component is selected from sodium aluminate; the carrier is a composite metal oxide, and the composite metal oxide is selected from at least one of a composite zinc-aluminium metal oxide, a composite nickel-aluminum metal oxide anda composite cobalt-aluminum metal oxide. The solid base catalyst is high in stability, long in service life, high in low-temperature catalysis activity, and short in reaction time. The invention further discloses a preparation method and application of the solid base catalyst.