13 results about "Phosphate conversion coating" patented technology

Disclosed is a phosphate coating, comprising: a phosphate portion, wherein the phosphate portion comprises pores, wherein the pores are at least partially filled with a corrosion inhibition sealant, wherein the corrosion inhibition sealant comprises: a base, wherein the base comprises a matrix and a metal within the matrix, wherein the metal within the matrix comprises aluminum, an aluminum alloy, zinc, a zinc alloy, magnesium, a magnesium alloy, or a combination thereof and an inhibitor mixed within the base, wherein the inhibitor comprises zinc molybdate, magnesium metasilicate, trivalent chromium, tungstenate, a metal phosphate silicate, or a combination thereof.

The invention belongs to the technical field of phosphate coatings, and discloses a micro-nano needle phosphate antibacterial multifunctional coating as well as a preparation method and application thereof. The method comprises the following steps: 1) respectively preparing a metal salt, a phosphate and a chelating agent into solutions by using water; 2) mixing the chelating agent solution with the metal salt solution to obtain a mixed solution; mixing a phosphate solution with the mixed solution, and adjusting the pH value to obtain a reaction solution; and (3) immersing a clean base material into the reaction solution, and carrying out hydrothermal reaction to obtain the micro-nano needle phosphate coating on the surface of the base material. The micro-nano needle structure coating disclosed by the invention has good antibacterial performance, corrosion resistance, biocompatibility and osteogenesis promotion performance, and has wide application prospects in the fields of preparation of antibacterial, corrosion protection and osteogenesis promotion materials and the like.

This invention provides a method for preparing a lithium-rich manganese-based cathode material modified with red phosphorus, a cathode sheet, and a lithium-ion battery, comprising: mixing the lithium-rich manganese-based cathode material with red phosphorus at a mass ratio of 1:0.001 to 0.01, and calcining it at 300 to 600°C for 1 to 6 hours under vacuum to obtain the red phosphorus-modified lithium-rich manganese-based cathode material; the general chemical formula of the lithium-rich manganese-based cathode material is: Li 1+x Mn 1‑x1 Ni 1‑x2 Co 1‑ x3 O2. This method uses inexpensive raw materials and involves a simple reaction process. After red phosphorus is sublimated by high-temperature heating, it undergoes a gas-solid interface reaction with lithium-rich manganese-based cathode materials, forming a phosphate coating on the cathode surface. Simultaneously, spinel and oxygen vacancies are formed, achieving phosphorus doping inside the cathode. This effectively improves the reversibility and structural stability of the anion redox reaction of lithium-rich manganese-based cathode materials, enhancing the material's initial coulombic efficiency, reversible specific capacity, and long-term cycle stability.

A hot-stamped steel includes a base material that is made of steel, a plated layer that is formed on a surface of the base material, and a phosphate coating that is formed on a surface of the plated layer; The chemical composition of the plated layer contains 20.00 to 45.00% by mass of Al, 10.00 to 45.00% by mass of Fe, 4.50 to 15.00% by mass of Mg, 0.10 to 3.00% by mass of Si, 0.05 to 3.00% by mass of Ca, 0 to 0.50% by mass of Sb, 0 to 0.50% by mass of Pb, 0 to 1.00% by mass of Cu, 0 to 1.00% by mass of Sn, 0 to 1.00% by mass of Ti, 0 to 0.50% by mass of Sr, 0 to 1.00% by mass of Cr, 0 to 1.00% by mass of Ni, and 0 to 1.00% by mass of Mn with a remainder of Zn and impurities; The phosphate coating consists of zinc phosphate crystals containing 5.0 to 50.0% by mass of Mg and 0.5 to 5.0% by mass of Ca; and the amount of adhesion of the phosphate coating per surface is in the range of 0.1 to 10.0 g / m2.

The invention relates to a method for the recovery of valuable metals from anode sludge generated as a result of electroplating and / or electrochemical reactions, and the production of phosphate coating chemicals from the recovered valuable metals.

The invention relates to a self-repairing microcapsule which is characterized by being prepared by the following steps: (1) stirring and mixing melamine, formaldehyde and deionized water, and carrying out addition reaction under an alkaline condition to form a water-soluble transparent prepolymer A; (2) dissolving diethyl aluminum hypophosphite and lauryl sodium sulfate in deionized water, adding organosilane and toluene, emulsifying to form a stable emulsion B, slowly pushing the emulsion B into the prepolymer A to obtain a polymerization solution, and completing polycondensation coating; and washing to remove the excessive prepolymer A, and drying to obtain the self-repairing microcapsule. The self-repairing microcapsule synthesized in the invention is biodegradable, green and environment-friendly, conforms to the current thought of green development, and can also be used as a repairing agent for other porous materials. According to the inorganic phosphate coating disclosed by the invention, the self-repairing microcapsules and the passivated aluminum particles are added into the phosphate coating, so that an effect of physically resisting a corrosive medium can be achieved.

Provided is a grain oriented electrical steel sheet including a base metal steel sheet, an intermediate layer and an insulation coating, wherein: the intermediate layer is an oxide film; an average thickness of the oxide film is 2-500 nm; the insulation coating is a phosphate coating; an average thickness of the insulation coating is 0.1-10 μm. When grazing incidence X-ray diffraction is performed on the phosphate coating using a Co-Kα excitation source, the X-ray diffraction pattern has a diffraction peak originating from cristobalite-type aluminum phosphate at a diffraction angle of 2θ=24.8°; a half value width FWHM0.5 of the diffraction peak under a diffraction condition with an X-ray incident angle ω=0.5° and a half value width FWHM1.0 of the diffraction peak under a diffraction condition with an X-ray incident angle ω=1.0° satisfy 0.20°≤FWHM0.5≤2.00°, 0.20°≤FWHM1.0≤2.00°, and 0°≤|FWHM0.5−FWHM1.0|≤1.00°.

The invention relates to the technical field of chemical conversion films, in particular to a preparation method of a chemical conversion film on the surface of a metal alloy matrix. According to the method, different metal phosphates are mainly used as outer layer films, the metal salt with the lowest mismatch degree is obtained as the main salt according to the comparison result by calculating the mismatch degree of the preferred crystal face of the inner layer film and the preferred crystal faces of the different outer layer films, and the proper conversion film solution is prepared by adding other metal salts; the method is used for generating a high-adhesion phosphate conversion film on the surface of a metal alloy matrix. According to the preparation method, an interface between two layers of films generated on the surface of the metal alloy matrix can be eliminated, so that the adhesive force of the chemical conversion film is improved under the conditions of reducing the mismatch degree of the chemical conversion film and ensuring the corrosion resistance of the chemical conversion film, and the service life of the chemical conversion film is prolonged. The problem that the adhesive force between the two layers of the deposition type phosphate conversion film of a double-layer structure is poor is solved, and the trial and error cost is reduced by means of the design concept and the preparation method.

The present invention provides a quartz fiber composite material with a high-temperature resistant coating and a preparation method thereof, which relates to the technical field of composite materials. Alumina sol and silica sol are mixed and aged according to the mass ratio of mullite to prepare a composite sol; the quartz fiber composite material is immersed in the composite sol for ultrasonic dip coating and then naturally dried, and this process is repeated several times to obtain an intermediate product; the intermediate product is placed in a muffle furnace for heating and sintering to form a high-temperature ceramic coating on the substrate of the quartz fiber composite material; after cooling, a phosphate coating is further coated on the surface of the high-temperature ceramic coating and heated for curing to obtain a quartz fiber composite material with a high-temperature resistant coating. The present invention forms a high-temperature ceramic coating and a phosphate coating on the surface of the quartz fiber composite material to jointly improve the high-temperature resistance of the composite material, and the high-temperature ceramic coating can seal the pores of the quartz fiber composite material to prevent moisture.

A hot stamped steel includes a base material that is formed of steel, a plated layer that is formed on a surface of the base material, and a phosphate coating that is formed on a surface of the plated layer; chemical composition of the plated layer contains 20.00 to 45.00 mass % of Al, 10.00 to 45.00 mass % of Fe, 4.50 to 15.00 mass % of Mg, 0.10 to 3.00 mass % of Si, 0.05 to 3.00 mass % of Ca, and the plated layer may further contain one or more of Sb, Pb, Cu, Sn, Ti, Sr, Cr, Ni, and Mn with a remainder of Zn and impurities; the phosphate coating comprises zinc phosphate crystals containing 5.0 to 50.0 mass % of Mg and 0.5 to 5.0 mass % of Ca; and the adhesion amount of the phosphate coating per one surface is in a range of 0.1 to 10.0 g / m2.

A method for applying phosphate coatings, comprising the following steps: - providing a phosphatizing bath containing zinc Zn; - electrodepositing at least part of the metals contained in the bath on a workpiece to be treated by means of current pulses.

The present invention relates to a process for preparing a metallic workpiece for cold forming by contacting at least one metallic surface thereof with an aqueous acidic phosphating solution to form at least one phosphate coating, comprising step 1 to step 6, wherein 1) a roughness value of the metallic workpiece is determined, 2) a surface A of the metallic workpiece is determined, 3) a current density is determined from a surface A of the metallic workpiece, 4) a factor FS is determined, using the current density determined in step 3, 5) phosphating is carried out electrolytically, whereby FS ≤ 200 A s / dm2 and 6) coating weight and optionally coating adhesion are determined, to a metallic workpiece, which has been coated with at least one phosphate coating according to the aforementioned process or to a metallic workpiece, which has been coated with at least one phosphate coating according to the aforementioned process and additionally with at least one lubricant layer, to a use of the metallic workpiece, which has been coated with at least one phosphate coating or with at least one such phosphate coating and additionally with at least one lubricant layer for cold forming or in sliding friction and to a metallic workpiece, which has been formed or forged by using the aforementioned metallic workpiece.

The present invention discloses a method for preparing a porous hydrophobic phosphate coating using titanium dioxide / urea-formaldehyde resin microcapsules. The method comprises: stirring a formaldehyde solution and urea at 50-70°C and a pH of 8-9 for 1 hour to react and generate a prepolymer; after the prepolymer is cooled to room temperature, titanium dioxide, an emulsifier, and an auxiliary agent are added, and stirring is performed at 50-70°C for 0.5 hour to acidify the pH of the system to 2-4; heating the prepolymer to 50-70°C and maintaining the temperature for 2-3 hours, filtering the prepolymer after cooling, washing the prepolymer with distilled water, and drying the prepolymer. During the heating and curing process of the phosphate coating, the capsule wall of the microcapsules in the present invention is thermally decomposed, leaving micron-sized circular holes on the surface of the coating, which facilitates the subsequent construction of micro-nanostructures to improve hydrophobic properties. The core titanium dioxide remains inside the coating, improving the wear resistance of the coating.