54results about How to "Polarization current density is small" patented technology

The invention discloses an electrode pole plate of a lithium ion battery. The electrode pole plate comprises a current collector and active substance coating layers, wherein the active substance coating layers are uniformly coated at two sides of the current collector, and grooves are symmetrically and uniformly formed in surfaces of the active substance coating layers at two sides. A thick pole plate with specially-shaped grooves in a surface are prepared, the electrolyte retention quantity in the battery can be remarkably increased, and long-term recycle of the battery is promoted; moreover, the specially-shaped grooves are uniformly formed in the surface of the thick pole plate, electrolyte penetration and diffusion are facilitated, and the rate charge-discharge electrochemical performance of the battery is improved; and meanwhile, the specially-shaped grooves are uniformly formed in the surface of the thick pole plate, thus, the specific area of the pole plate is expanded, the polarization current density of the battery during the charge-discharge process is reduced, a lithium precipitation risk of a large-current charging positive electrode separator is improved, and the application safety of the battery is improved.

The invention provides a preparation process of metal surface protective treatment fluid, which comprises the following steps: firstly, respectively preparing a main agent solution, and two additive solutions, fully mixing and uniformly stirring the main agent solution and the two additive solutions so as to complete the preparation process of the metal surface protective treatment fluid, wherein 1 liter of the metal surface protective treatment fluid is prepared by the following components by weight: 13-50 g of silane coupling agent KBM403, 1-3 g of phytic acid, 1.5-9 g of triethanolamine, 0.2-0.4 g of sodium molybdate, 3-8 g of sodium silicate, 95-105 g of ethanol, and the balance of water. When the metal surface protective treatment fluid prepared by the method of the invention is used for treating a metal workpiece, a film layer is formed on the metal surface, which has the characteristics of strong adhesion, denseness, uniformity, and low polarized current density; the preparation process of the invention improves the deficiencies of existing metal surface pretreatment process, thus allows better application of metal surface pretreatment, and can substitute phosphatization and blackening technology. Meanwhile, the production and application processes are environment-friendly and cause no pollution.

The invention discloses a surface silanization protection treatment agent for hard aluminum alloy. The surface silanization protection treatment agent is prepared from the following ingredients in weight (gram) in every 500g of mixture liquid: 1-2g of monoethanolamine benzoate, 3-5g of guar gum, 3-5g of rosin, 1-2g of trihydroxyethyl isocyanurate, 10-12g of maleic anhydride, 4-6g of diethylene glycol butyl ether, 5-8g of propylene glycol, 3-5g of butane diacid, 8-12g of vinyl triethoxysilane and the balance of deionized water. According to the surface silanization protection treatment agent, rosin serving as a reaction raw material is polymerized with raw materials, such as maleic anhydride and silane, and then, a strong protecting film can be formed on the surface of metal; and the corrosion resistance of metallic matrixes is enhanced.

The invention relates to a high-efficiency electrolytic phosphating solution which is composed of 100-150 g/L phosphoric acid, 71-75 g/L zinc oxide, 60-80 g/L nitric acid, 180-220 g/L calcium carbonate, 8-40 g/L additive and the balance of deionized water. The additive is citric acid or tartaric acid or sodium nitrate or nickel nitrate or copper sulfate or fluosilicic acid, or a mixture of any combination. The preparation method comprises the following steps: injecting the deionized water into a container, adding the phosphoric acid and nitric acid, heating while stirring, slowly adding the zinc oxide while stirring when the temperature reaches 80 DEG C, and stopping heating when the zinc oxide is completely dissolved; continuing stirring for half an hour, adding the calcium carbonate, and continuing stirring for half an hour; and cooling the obtained solution to room temperature, adding the additive, continuing stirring until the additive is completely dissolved, and adding the deionized water to the specified volume, thereby obtaining the electrolytic phosphating solution. The phosphating solution has the characteristic of no toxicity, can be used at normal temperature, and avoids physical damage to the operators and the waste of resources.

The invention discloses a protective treating agent for silanizing the surface of an anti-corrosion stainless steel plate surface. The protective treating agent is prepared from the following components by weight (g) in each 500 grams of mixed solution 1 to 2g of ammonium chloride, 1 to 2g of diethylamine, 2 to 3g of tetraisopropyl titanate, 3 to 5g of rosin, 1 to 2g of 1,3,5-tris(2-hydroxyethyl) cyanuric acid, 10 to 12g of maleic anhydride, 4 to 6g of diethylene glycol monobutyl ether, 10 to 12g of polyethylene glycol, 3 to 5g of oxalic acid, 1 to 2g of urea, 10 to 12g of aminopropyl triethoxy silane, and the balance of deionized water. According to the protective treating agent, the rosin is used as a reaction raw material and is polymerized with raw materials such as the maleic anhydride and silane, and a stronger protective film can be formed on the metal surfaces; and the corrosion resistance of metal matrixes is enhanced.

The invention discloses a metal surface silicane treating agent containing diethanol amine. The metal surface silicane treating agent containing the diethanol amine is characterized by being a mixed solution which is prepared from following compositions of, by weight part ratio in every liter of the mixed solution, 28-35 parts of 1,2-bis (triethoxy silicon) ethane, 32-40 parts of gamma-aminopropyl triethoxy silicane, 100-160 parts of aqueous nanometer zinc oxide material, 2-3 parts of allyl alcohol, 1-2 parts of ethylene glycol, 2-3 parts of sodium tripolyphosphate, 2-4 parts of propylene glycol, 2-3 parts of zirconium tetrafluoride, 2-3 parts of diethanol amine, 2-3 parts of ammonium chloride, 1-2 parts of diethylene glycol monobutyl ether, 1-2 parts of trimethylolpropane, 0.3-0.5 part of sodium dodecyl benzene sulfonate, and the balance water. The metal surface silicane treating agent containing the diethanol amine has the advantages that, a silicane coating formed on the surface of metal after the metal is processed by using the surface silicane treating agent has good decay resistance, service life of the metal is prolonged, and a compact and firm coating is formed on the surface of the metal by combining the 1,2-bis (triethoxy silicon) ethane and the gamma-aminopropyl triethoxy silicane for use.

The invention discloses a silane finishing agent at the surface of a galvanized steel sheet and a preparation method thereof. Mixed solution is prepared from the following components of a silane coupling agent KH550, film-forming resin, benzoic acid monoethanolamine, propylene glycol, triethanolamine, carboxyl methyl cellulose, polyvinyl alcohol, oxalic acid, polydimethylsiloxane, hydroquinone sodium bicarbonate and ethanol. The silane coupling agent KH550 is adopted as a primary material; and the ethanol is taken as a solvent, so that the silane finishing agent is low in cost; the benzoic acid monoethanolamine and different auxiliary agents are added to the material at the same time; and the processing time and the processing temperature of the finishing agent are improved. A work-piece is processed by the silane finishing agent disclosed by the invention; a polyacid film is formed at the surface; and the film has the characteristics of being strong in adhesive force, free of a cavity, compact and even in chasm, small in polarization current density, environment-friendly in the production process and free of pollution.

The invention discloses metal surface silane treating agent. The treating agent is characterized by preparing mixed liquid by the following components, and the weight parts (g) of all components in each liter of mixed liquid are as follows: 35 to 45 parts of 3-glycidyl ether oxygroup propyl trimethoxy silane, 35 to 45 parts of vinyl tri(beta-methoxyl ethyoxyl)silane, 100 to 180 parts of aqueous nano-zinc oxide materials, 4 to 5 parts of 2-methyl-1, 3-propylene glycol, 2 to 4 parts of polyethylene glycol, 2 to 2.5 parts of zirconium fluoride, 2 to 3 parts of dimethyl sulfoxide, 1 to 2 parts of urea, 0.3 to 0.6 part of benzotriazole, 0.3 to 0.5 part of monoammonium phosphate and the rest amount of water. The treating agent has the advantages that after the metal is treated by the surface silane treating agent, a silane coating layer formed on the metal surface has excellent corrosion resistance, and the service life of the metal is prolonged; and as propyl trimethoxy silane is combined with aminopropyl triethoxy silane for use, the compact and firm coating layer can be formed on the metal surface.

The invention discloses a surface silanization protection treatment agent for stainless steel plates. The surface silanization protection treatment agent is prepared from the following ingredients in weight (gram) in every 500g of mixture liquid: 2-3g of butane diacid, 1-2g of ammonium molybdate, 5-8g of gelatin, 2-3g of lanthanum nitrate, 3-5g of rosin, 1-2g of trihydroxyethyl isocyanurate, 10-12g of maleic anhydride, 4-6g of diethylene glycol butyl ether, 5-8g of propylene glycol, 2-3g of acetic acid, 1-2g of urea, 10-12g of aminopropyl triethoxysilane and the balance of deionized water. According to the surface silanization protection treatment agent, rosin serving as a reaction raw material is polymerized with raw materials, such as maleic anhydride and silane, and then, strong protecting films can be formed on the surface of metal; and the corrosion resistance of metallic matrixes is enhanced.

The invention provides a method for improving surface oxidation resistance of an aluminum alloy, and belongs to the technical field of casting of aluminum alloys. The method comprises the steps of: surface treatment, injection of yttrium, nickel and indium ions, high-temperature curing, spraying of a surface treatment agent and medium-temperature curing. Compared with the prior art, the method selects yttrium, nickel and indium elements as injecting elements, so that the surface oxidation resistance of a magnesium alloy is effectively improved; meanwhile, the surface treatment agent is sprayed to the surface of the aluminum alloy, so that a film formed on the surface is thick and environment-friendly; the film layer is compact and uniform; the density of polarization current is lower; and the film is excellent in corrosion resistance, high in oxidation resistance and lasting in protectiveness. The method is simple in process, wide in application range, capable of modifying the surfaces of the aluminum alloys with various types and free of the environmental pollution problem.

The invention discloses a silane treating agent and a preparation method thereof. The silane treating agent comprises, by weight, 2-5 parts of a silane coupling agent, 2-5 parts of phytic acid, 8-14 parts of nitrate, 4-7 parts of molybdate and 70-100 parts of water. The silane treating agent prepared through the method has the beneficial effects of being stable in performance and free of poison and pollution. After the silane treating agent prepared through the method is utilized for treating a metal workpiece, a film layer formed on the metal surface has the beneficial effects of being excellent in adhesive force, compact, uniform and low in polarization current density. The defects of existing metal surface pretreatment are overcome, and therefore the silane treating agent can be applied to metal surface pretreatment better.

The invention discloses a surface silanization protection treatment agent for corrosion inhibiting and resisting metal. The surface silanization protection treatment agent is prepared from the following ingredients in weight (gram) in every 500g of mixture liquid: 1-2g of benzoic acid amide, 1-2g of triethanolamine, 3-5g of methyl cellulose, 8-10g of rosin, 0.5-1.2g of trihydroxyethyl isocyanurate, 10-12g of maleic anhydride, 4-6g of diethylene glycol butyl ether, 5-8g of isopropanol, 0.5-1g of ammonium dihydrogen phosphate, 1-2g of urea, 5-8g of N-2-(aminoethyl)-3-aminopropyl trimethoxysilane and the balance of deionized water. According to the surface silanization protection treatment agent, rosin serving as a reaction raw material is polymerized with raw materials, such as maleic anhydride and silane, and then, a strong protecting film can be formed on the surface of metal; and the corrosion resistance of metallic matrixes is enhanced.

The invention discloses a metal material silane surface treating agent and a preparation method thereof. The silane surface treating agent is mixed liquid formed by mixing the following components: methyl triethoxysilane, film-forming resin, chitosan, ammonium molybdate, zinc dialkyl dithiophosphate, phytic acid, 2-n-octyl-4-isothiazolin-3-ketone, sodium dodecyl benzene sulfonate, polydimethylsiloxane, catechol, sodium carbonate and ethanol. The silane surface treating agent is prepared by using the methyl triethoxysilane as a main material and ethanol as a solvent; the materials are low in cost; and meanwhile, chitosan and a plurality of different auxiliaries are added into the raw materials, so that the treatment time and the treatment temperature of the treating agent are improved. A metal workpiece is treated by virtue of a silanization treating agent, a multi-acid film layer is formed on the surfaces of the metal workpiece, and the film layer has the characteristics of high adhesion, compactness, uniformity and low polarization current density and no cavity and rifts; and the production process is environment-friendly without pollution.

The invention discloses a metal surface silane treating agent containing ammonium metavanadate. The metal surface silane treating agent is characterized by being a mixture solution prepared from the following ingredients in parts by weight (gram) in each liter of the mixture: 22-32 parts of 3-(isobutene acyl oxygen) propyl trimethoxy silane, 27-40 parts of N-phenyl-3-amino propyl trimethoxy silane, 100-190 parts of aqueous nano-zinc oxide, 3-5 parts of ethylene diamine tetramethylene risedremate sodium, 3-4 parts of allyl alcohol, 3-4 parts of propylene glycol, 2-3 parts of zirconium fluoride, 2-3 parts of monohydrate ammonia, 1-2 parts of diethanol amine, 1-2 parts of dimethyl sulfoxide, 0.8-1 parts of ammonium metavanadate, 0.7-0.9 parts of bibutyl cellosolve and the balance of water. The aqueous nano-zinc oxide prepared by using the process provided by the invention has high dispersion stability and efficient adhesiveness, and is uniformly distributed on the surface of a metal, so that the metal has high compactness and anti-ion permeability; and due to the added assistant such as the ethylene diamine tetramethylene risedremate sodium and the like, the compactness of a silane absorbing film is increased, the filming quality is improved, the film layer has the characteristics of being strong in adhesion capability, free of cavity and rift, compact and uniform and small in polarization current density, and the production process is environmental-friendly and pollution-free.

The invention provides a silanization processing agent for metal piece individually protection, which is a mixed solution prepared by the following components, and in each liter of the mixed solution, the weight parts of the components are: 30-60 g of 1,2-diethoxylsilyl ethane, 2-5 g of sodium molybdate, 0.5-1.5 g of alpha-sulfo fatty acid methyl ester sodium, 0.1-0.4 g of ethylenediaminetetraacetic acid disodium salt, 4-7 g of isopropanol, and the balance of ethanol solution. The processing agent of the invention is stable in performance, simple in preparation, nontoxic, and free of pollution. When a metal piece is processed by the processing agent of the invention, a film layer formed on the metal surface has the characteristics of strong adhesion, compactness, uniformity, and small polarization current density, which improves the deficiencies of existing metal surface pretreatment, allows better application of metal surface pretreatment, and substitutes phosphatization and blackening technology.

The invention relates to metal wire drawing vitrifying liquid which comprises the following raw materials by weight: 20-50 g/L of sodium fluozirconate or potassium fluozirconate, 30-40 g/L of sodium fluotitanate or potassium fluotitanate, a silane coupling agent with volume content of 2%-5%, 1-3 ml/L of phytic acid, 1.5-9 ml/L of triethanolamine, 0.2-0.4 g/L of sodium molybdate, 3-8 g/L of sodium silicate, 5-10 g/L of sodium tartrate, 5-10g/L of calcium nitrate, 3-5 g/L of polyoxyethylene ether substances, ethanol with the volume content of 6%-10% and the balance of water. The invention also provides a preparation method of the metal wire drawing vitrifying liquid. The preparation method comprises the processes of raw material mixing, reaction and the like. The metal wire drawing vitrifying liquid disclosed by the invention has the advantages of less energy consumption, low possibility in sediment appearance, economy and environmental friendliness, and a vitrified conversion film formed on the surface of a metal wire is good in adhesive power, dense and uniform in film layer and favorable to metal finish machining and can fundamentally overcome the defects of the existing drawing surface pretreatment of the metal wire, so that the drawing surface pretreatment of the metal wire can be preferably applied, and a phosphatizing drawing treatment technology is substituted.