72results about "Phosphatisation" patented technology

To provide an alloy member having both corrosion resistance and excellent appearance.SOLUTION: An alloy member 100 comprises a substrate 101 comprising magnesium as a main component and containing lithium, and a corrosion preventive film 102 containing magnesium, phosphorus, and fluorine, the corrosion preventive film 102 being disposed on the substrate 101. The average film thickness T of the corrosion preventive film 102 is 20 μm or more, and the difference between the maximum value and the minimum value of the film thickness of the corrosion preventive film 102 is less than 20 μm.SELECTED DRAWING: Figure 1

The invention belongs to the technical field of electrode materials, and particularly relates to an electrode foil, a preparation method thereof and an aluminum electrolytic capacitor, and the preparation method of the electrode foil comprises the steps: carrying out the formation of a corrosion foil, and forming an aluminum oxide film on the surface of the corrosion foil; forming a nano-porous silicon dioxide film on the surface of the aluminum oxide film to obtain an electrode foil with an aluminum oxide-silicon dioxide double-layer composite oxide film; and sequentially carrying out phosphating treatment and annealing treatment on the electrode foil. According to the preparation method, after the corrosion foil is subjected to formation treatment to form the Al2O3 film, the nano-porous SiO2 film is formed on the surface of the Al2O3 film, the SiO2 film is subjected to phosphating treatment to contain phosphorus elements, the phosphorus elements are uniformly diffused into the SiO2 film, a double-layer composite oxidation film with the Al2O3 inner layer and the SiO2 outer layer is obtained, and the specific volume, the hydration resistance and the corrosion resistance of the low-voltage electrode foil are improved.

The invention relates to the technical field of surface treatment, and discloses a PVD (Physical Vapor Deposition) treatment method for sawteeth. Comprising the following steps: carrying out alkaline electrolytic polishing treatment to obtain a flat surface, carrying out phosphating treatment after pickling neutralization to form a chemical conversion film, depositing a hard functional layer through PVD plating, carrying out surface cleaning and pretreatment to obtain a clean substrate, coating a heat-resistant base coat with a polymer to form a heat-resistant hard bottom layer, coating a wear-resistant surface coat with a polymer to form a wear-resistant protective layer, and curing to form a film to form an integrated structure. Through the synergistic effect of the five-layer composite protection structure, the sawtooth groove protection blind area is eliminated, the coating quality consistency is remarkably improved, the corrosion resistance time exceeds 2000 hours, the high-temperature softening limit is broken through, 100-180 DEG C stable work is achieved, the wear resistance is improved by one order of magnitude, meanwhile, functionality and durability are considered, and the service life is prolonged. And an effective technical solution is provided for long-term reliable application of the sawtooth workpiece under harsh working conditions.

The invention discloses a phosphating solution based on electric triggering and bionic template cooperative regulation and control as well as a use method and application thereof, and belongs to the technical field of phosphating solutions. The phosphating solution comprises the following components: 5-60 g / L of a phosphating precursor; 0.1 g / L to 10.0 g / L of a bionic template agent; 0.5 g / L to 20 g / L of a nanometer reinforcing phase; 7-65 g / L of a metal ion source; 0.1-3.0 g / L of an oxidizing agent; the pH regulator is used for regulating the pH value to 3.5 to 6.0; and the balance of deionized water. The phosphating precursor is one or more of phytic acid, amino trimethylene phosphonic acid and 1-hydroxyethylidene-1, 1-diphosphonic acid; when the phosphating solution is used, a workpiece is used as a cathode to apply an electric field. The phosphating solution is used for metal protection or metal drawing. A phosphating film formed by the phosphating solution based on electric triggering and bionic template cooperative regulation under the action of an electric field has excellent corrosion resistance, adhesive force and wear resistance, and sediment in the phosphating process is few.

The corrosion resistance of converted coated metal substrate surfaces can be further improved by treating the surfaces with an aqueous mixture of a preformed reaction product obtained by reacting a catechol compound (e.g., dopamine or a salt of dopamine) with a functionalized co-reacting compound (e.g., polyethyleneimine).

The invention discloses a tinned steel plate with a chromium-free surface, which comprises a substrate and a tinned layer plated on the surface of the substrate, and the surface of the tinned layer is provided with a passive film; the passivation film contains the following effective elements: Ti with a content of 0.5-6 mg / m < 2 >; the total content of at least one of Mn, Zn and Mo is 1-8 mg / m < 2 >; p having a content of 0.5 to 5 mg / m < 2 >; the content of Si is 0.01 to 0.5 mg / m < 2 >. The invention further discloses a manufacturing method of the tin-plated steel plate. The manufacturing method comprises the following steps: electroplating tin on the surface of the substrate; carrying out tinned layer soft fusion alloying treatment on the tinned steel plate; carrying out electrolytic pretreatment; passivating treatment is conducted, specifically, the surface of the tin-plated steel plate is evenly coated with a chromium-free passivating solution in a dipping and / or spraying mode, and then drying is conducted; wherein the chromium-free passivation solution contains at least one of water-soluble salt of titanium, water-soluble salt of manganese, zinc and molybdenum, inorganic phosphate, silicon-containing oligomer and / or modified silica sol.

The grain-oriented electrical steel sheet includes: a base steel sheet; and an insulating coating formed on a surface of the base steel sheet, in which the insulating coating includes: an intermediate layer that is formed on a side of the base steel sheet and contains a crystalline metal phosphate; and a tension coating layer formed on a surface side of the insulating coating, and the crystalline metal phosphate is plate-shaped, and has an average grain size of 0.5 to 3.0 µm.

The utility model relates to the technical field of steel cord production, in particular to a cathode gun and a steel cord phosphating device, the cathode gun comprises a plurality of gun body structures, each gun body structure comprises a gun body and a conductive head, and the conductive heads are detachably connected with the gun bodies; the gun body comprises a gun body, a hook is arranged at the first end of the gun body, a connecting plate is arranged at the second end of the gun body, and the hook is used for being connected with a cathode structure. The cathode gun provided by the utility model comprises a plurality of gun body structures, and each gun body structure is in contact with the steel wire through the conductive head, so that a plurality of contact points are formed between the cathode gun and the corresponding steel wire, the current of the contact points is reduced by increasing the number of the contact points, the heat productivity of the contact points is reduced, the conductive efficiency is improved, and the electric quantity loss is reduced; and non-stop production can be realized.

The invention relates to the technical field of metal alloys, and discloses a corrosion-resistant magnesium alloy and a preparation method thereof, and the corrosion-resistant magnesium alloy comprises the following components in percentage by weight: 0.1-1 wt% of strontium, 0.4-0.6 wt% of cerium, 0.1-1.5 wt% of calcium and the balance of magnesium and impurities. The preparation method comprises the following steps: cleaning strontium, cerium, calcium and magnesium, respectively putting into a preheating furnace, preheating and preserving heat, putting into a vacuum induction furnace, heating until the magnesium raw material is completely molten, sequentially adding the preheated strontium, cerium and calcium raw materials, stirring while adding, pouring into a casting mold, preparing a blank, carrying out heating and heat preservation treatment twice, and coating by adopting an electro-deposition method to obtain the corrosion-resistant magnesium alloy. Strontium, cerium and calcium are added, so that the mechanical property of the magnesium alloy is improved to a certain extent, and meanwhile, the corrosion resistance is greatly improved by combining with a coating process. The alloy material source is wide, the production cost is reduced, and the preparation method is simple in process, easy to operate and control and suitable for large-scale industrial production.

The invention discloses a steel polishing and phosphating integrated electrolyte and a preparation method and application thereof, and belongs to the technical field of phosphating. The steel polishing and phosphating integrated electrolyte comprises the following raw materials in percentage by weight: 30-40% of phosphoric acid, 15-25% of zinc oxide, 10-20% of organic acid, 4-8% of fatty alcohol, 2-4% of inorganic ammonium salt, 0.4-1% of a polarization agent, 0.2-0.6% of a dispersing agent and the balance of deionized water. According to the method, the steel polishing and phosphating integrated electrolyte serves as an electrolyte, the steel material is subjected to electrolytic polishing treatment and electrolytic phosphating treatment, and a steel material finished product subjected to electrolytic polishing and electrolytic phosphating is obtained. The steel polishing and phosphating integrated electrolyte disclosed by the invention supports electrolytic polishing and electrolytic phosphating at the same time, and has excellent phosphating effect and polishing effect; according to the steel polishing and phosphating integrated process, the resource utilization efficiency is greatly improved based on polarity switching, and the production cost is reduced.

The utility model discloses an industrial electrolytic phosphating tank which comprises a phosphating tank body and a phosphating roller arranged in the phosphating tank body, two ends of the phosphating roller are respectively provided with a roller shaft, each roller shaft is provided with a first gear which performs follow-up motion, a second gear which is meshed with the first gear is arranged below the first gear, and the second gear is meshed with the second gear. The second gear is rotationally connected to the phosphating tank body, a lower chain wheel which rotates synchronously is coaxially arranged on the second gear, an upper chain wheel which is rotationally connected to the phosphating tank body is arranged above the lower chain wheel, a chain is in transmission connection between the upper chain wheel and the lower chain wheel, and a power assembly which controls rotation is in transmission connection to the upper chain wheel. A partition plate is arranged between the phosphorization roller and the first gear, a limiting groove with the upper end connected with the outside and extending up and down is formed in the partition plate, and the roller shaft slides into the limiting groove from top to bottom. The electrolytic phosphating tank has the advantages of being balanced in concentration, sufficient in reaction and high in phosphating layer quality, and is complete in overall function and high in practicability.

The present invention relates to a method for phosphating metal surfaces, preferably alloy-galvanized steel strip surfaces, by treating them by dipping or spray-dipping with acidic, aqueous solutions which may contain magnesium ions, phosphate ions and nitrate ions and, for further improvement of the layer formation, possibly further ions selected from ammonium ions, alkali metal ions and / or fluoride ions, wherein the workpieces are simultaneously treated cathodically with a direct current.

The utility model discloses a steel wire electrolytic phosphorization constant tension pay-off support, including fixed bolster, pay-off bearing seat and pay-off tray, still include external controller, be equipped with horizontal adjusting device on the fixed bolster, be equipped with constant tension pay-off executor on the horizontal adjusting device, be equipped with speed measuring device below the pay-off tray, constant tension pay-off executor and speed measuring device are electric connection with external controller respectively, be equipped with synchronous transmission mechanism between constant tension pay-off executor and pay-off tray, one side of synchronous transmission mechanism is equipped with longitudinal adjusting device, the utility model discloses can according to the slight change of steel wire tension in production process, adjust pay-off device braking torque, realize pay-off steel wire tension dynamic balance operation, can also ensure that the problem of disorderly line, fling cover does not occur when stopping.

The present invention belongs to the field of phosphating solutions, and specifically relates to a cathode electrophoretic ternary phosphating solution. The cathode electrophoretic ternary phosphating solution comprises the following components, calculated by mass: 20-50% phosphoric acid, 1-5% zinc oxide, 1-10% manganese carbonate, 1-5% nitric acid, 0.1-1% fluoride, 1-10% sodium carbonate, 5-20% nickel nitrate, and the balance being water. The cathode electrophoretic phosphating solution provided by the present invention offers excellent performance, convenient operation, and low cost. It overcomes the poor corrosion resistance of phosphate films, improves salt spray performance when used in conjunction with cathode electrophoresis, and is better compatible with electrophoresis.

The present invention relates to the technical field of manufacturing electrode foil for aluminum electrolytic capacitors, and specifically to a method for preparing electrode foil for low-defect and high-capacity aluminum electrolytic capacitors. The method for preparing electrode foil for low-defect and high-capacity aluminum electrolytic capacitors of the present invention comprises the following steps: (1) pickling, (2) first pulse treatment, (3) chemical formation treatment, (4) heat treatment, (5) second pulse cleaning, (6) chemical formation repair treatment, and (7) passivation. The electrode foil for low-defect and high-capacity aluminum electrolytic capacitors of the present invention removes the hydrated aluminum oxide film generated on the surface of the corroded foil in the air and the hydrated aluminum oxide film produced in the chemical formation process by pulse laser cleaning, and performs oxide film repair in a chemical formation repair solution, thereby promoting the formation of a high-crystallinity anodized film, reducing defects, and improving density.

The invention relates to a biodegradable implant comprising a surface coated magnesium alloy or zinc alloy product, whereby the coating layer comprises oxides and / or phosphates of from rare-earth elements, Mg, Ca, Zn, Zr, Cu, Fe, Sr, Li, Mn or Ag wherein the coating is preferably generated by plasma electrolytically oxidation (PEO). The invention further comprises a method for preparing the coated magnesium or zinc alloy product of the implant.

This utility model belongs to the technical field of phosphating heating tubes, and relates to a two-stage heating pipeline for coil heating, including a heat pump. The first interface of the heat pump is connected to the main outlet water pipe, which is connected to a transition guide pipe. The second interface of the heat pump is connected to the main return water pipe. The main outlet water pipe is connected to several branch outlet water pipes, each of which is connected to the inlet of a medium-temperature tank. The outlet of each medium-temperature tank is connected to the transition guide pipe via a first return water branch pipe. The transition guide pipe is also connected to the inlet of a low-temperature tank via a transition guide branch pipe, and the outlet of the low-temperature tank is connected to the main return water pipe. This utility model can improve the utilization rate of wastewater hot water, meet market demands, and has a compact overall design, reducing operating costs.

Disclosed in the present invention is a tinplate having a chromium-free surface, comprising a substrate and a tin plating plated on the surface of the substrate. The surface of the tin plating has a passivation film. The passivation film contains the following effective elements: 0.5-6 mg / m2 of Ti; at least one of Mn, Zn, and Mo having a total amount of 1-8 mg / m2 ; 0.5-5 mg / m2 of P; and 0.01-0.5 mg / m2 of Si. Further disclosed in the present invention is a method for manufacturing the tinplate, comprising the steps of: electroplating tin on the surface of a substrate; subjecting the tinplate to a tin plating reflow alloying treatment; performing electrolysis pretreatment; and passivation treatment: uniformly applying a chromium-free passivation solution to the surface of the tinplate by means of immersion and / or spraying, and then drying, wherein the chromium-free passivation solution contains: a water-soluble salt of titanium, at least one of water-soluble salts of manganese, zinc and molybdenum, an inorganic phosphate, a silicon-containing oligomer, and / or a modified silica sol.

The invention provides a surface passivation method for a tin plate with extremely low tin content, and belongs to the field of tin plate production. Comprising the following steps: carrying out first electrochemical cathode treatment on the tinplate with extremely low tin content after softening treatment in a Ti-containing phosphating solution so as to form a first passivation film on the surface of at least one side of the tinplate with extremely low tin content; and performing second electrochemical cathode treatment on the extremely-low-tin-content tin-plated plate with the first passivation film in a Cr-containing passivation solution so as to form a second passivation film on at least part of the surface of the first passivation film. First electrochemical cathode treatment is carried out in a Ti-containing phosphating solution, so that the first electrochemical cathode treatment is combined with iron on the surface of a tin plate with extremely low tin content, a composite conversion film layer containing Ti, Fe and P is generated, and the situation that the corrosion resistance is affected by an iron leakage area on the surface of the tin plate is avoided; and secondly, chromate cathode passivation is conducted on the treated tin plate, a trivalent chromium passivation film is generated on the surface tin layer part, and therefore the corrosion resistance of the tin plate with the extremely low tin content is improved.

The invention provides a high-depth-ratio microcavity-gas film coupling type underwater drag reduction material as well as a preparation method and application of the high-depth-ratio microcavity-gas film coupling type underwater drag reduction material. The porous anodic aluminum oxide template has a depth-to-width ratio of (25-100): 1, a shape factor greater than or equal to 0.95 and less than or equal to 1.05, and a pore spacing standard deviation greater than or equal to 0 and less than or equal to 0.05. The porous anodic aluminum oxide template disclosed by the invention can be used as an underwater anti-drag material.

The invention relates to a biodegradable implant comprising a surface coated magnesium alloy or zinc alloy product, whereby the coating layer comprises oxides and / or phosphates of from rare-earth elements, Mg, Ca, Zn, Zr, Cu, Fe, Sr, Li, Mn or Ag wherein the coating is preferably generated by plasma electrolytically oxidation (PEO). The invention further comprises a method for preparing the coated magnesium or zinc alloy product of the implant.

The invention relates to the technical field of metal spraying, and discloses a tobacco frame surface electrophoretic spraying composite process which comprises the following steps: S1, surface pretreatment: performing degreasing, pickling, surface conditioning and phosphating treatment on a to-be-treated metal tobacco frame; s2, carrying out immersion type electrophoresis: washing the metal cigarette frame, and carrying out electrophoresis treatment; s3, cleaning and curing are conducted, specifically, the metal smoke frame is washed and then dried, and an electrophoretic coating layer is formed; s4, electrostatic powder spraying; and S5, secondary drying and curing. In the surface pretreatment process, a layer of phosphating film is formed on the surface of the metal cigarette frame through phosphating treatment, then a traveling immersion type electrophoresis process and an electrostatic powder spraying process are combined, and a high-quality electrophoretic coating layer and a high-quality electrostatic coating layer are formed on the outer side of the phosphating film through secondary drying and curing; the aim of being not easy to oxidize and rust after collision is fulfilled; and the coating has the characteristics of difficult discoloration, strong corrosion resistance, difficult weathering and pulverization phenomena, strong adhesive force and good durability, and automatic flow line production is realized.

The present application relates to a kind of stability connecting rod and its preparation method, belong to mechanical component technical field.The present application discloses a kind of stability connecting rod, the stability connecting rod is composed of stability connecting rod body and manganese phosphate coating;The raw material of the connecting rod body includes 40CrMnMo, silicon carbide, graphite powder, wherein the total mass of silicon carbide, graphite powder accounts for 0.8~3% of the total mass of raw material.The present application further discloses a kind of preparation method of stability connecting rod, the preparation method of stability connecting rod includes in the surface of connecting rod body covering manganese phosphate coating, wherein stability connecting rod body is prepared by mixing after raw material powdering, then pre-pressing, sintering, hot forging, heat treatment, shot peening treatment, machining are sequentially carried out.The present application is prepared by simple, low-carbon method, and the stability connecting rod with long service life and corrosion resistance is prepared.

To provide a surface treated steel sheet excellent in surface appearance, sulfuration black discoloration resistance and alkali resistance and capable of showing high adhesion to a coating layer.SOLUTION: A surface treated steel sheet includes: a tin plated steel sheet obtained by subjecting a steel sheet to tin plating; a tin oxide layer formed on the tin plated steel sheet and including tin oxide as a main component; a composite oxide layer formed on the tin oxide layer and including phosphoric acid and aluminum as a main component; and an aluminum oxygen compound layer formed on the composite oxide layer and including an aluminum oxygen compound as a main component. The thickness of the tin oxide layer is 8-20 nm.SELECTED DRAWING: None

The present invention relates to the field of phosphating technology, and specifically to a slag-free immersion phosphating method and its application using an electrochemical method. In view of the hazards of phosphating slag produced by traditional immersion phosphating and the shortcomings of existing slag-free or low-slag phosphating research, this process places the raw material wire as the cathode and the inert electrode as the anode in a phosphating tank, and starts a DC power supply when the ferrous ion concentration of the phosphating solution reaches the standard. Through the electrochemical method, the ferrous ions are reduced to elemental iron at the cathode and taken out, thereby reducing the generation of phosphating slag. At the same time, a phosphating solution formula is provided, including multiple components such as phosphoric acid, zinc oxide, nitrate, and the like, and a preparation method thereof. This patent realizes the long-term utilization of the traditional phosphating process, reduces costs, improves economy and environmental protection, and does not affect the quality of the phosphating film and the back-end application. It is easy to operate and applicable.

The utility model belongs to the technical field of phosphating filter equipment, and relates to a pipeline structure of a phosphating filter, which comprises at least two phosphating tanks arranged in parallel, each phosphating tank is respectively connected with a blanking pipe, the lower ends of the blanking pipes are gathered to a blanking main pipe, and the blanking main pipe is connected to an inlet of the phosphating filter; an outlet of the phosphating filter is connected with a filter outlet main pipe, the filter outlet main pipe is connected with the middle of a pipe body of a filter outlet branch pipe, the two ends of the filter outlet branch pipe are respectively connected with the middle of a pipe body of a conveying pipe, and the conveying pipe is divided into a phosphating tank branch pipe and a sewage discharging branch pipe by the filter outlet branch pipe. The upper end of the phosphating tank branch pipe extends into the phosphating tank, and the lower end of the pollution discharge branch pipe is connected to the pollution discharge header pipe. The utilization rate of the phosphating filter can be improved; the one-driving-two filtering requirement of the phosphating filter is met; the whole equipment is compact, and manufacturing and using cost is reduced.

This description relates to a process for manufacturing an anti-oxidation protection for a C / C composite substrate, as well as a mechanical part equipped with such protection. The process comprises the following steps: supplying a substrate to be protected (21), the substrate being made of C / C composite material; supplying a liquid suspension (15) comprising at least one active principle from the phosphate family; supplying a direct current electric generator (12); placing the substrate (21) in the suspension (15), as the first electrode (13), and connecting the substrate (21) to a first terminal of the electric generator (12); placing a second electrode (14) in the suspension (15), opposite the substrate (21), and connecting the substrate (21) to a second terminal of the electric generator (12); and applying a voltage (U) of at least 10 V between the two electrodes (13, 14) for at least 1 minute. Fig. 2.

The invention relates to the technical field of phosphating waste residue utilization, in particular to an electrolytic phosphating supply composition prepared from phosphating waste residues, an electrolytic phosphating supply tablet prepared from the phosphating waste residues and a method and application of the electrolytic phosphating supply composition and the electrolytic phosphating supply tablet. The invention discloses an electrolytic phosphating supply composition prepared from phosphating residues. The electrolytic phosphating supply composition comprises the following components in percentage by weight: 1-2% of an adhesive, 5-10% of organic acid, 15-30% of sodium bicarbonate, 2-8% of a lubricating release agent and the balance of phosphating residues. According to the electrolytic phosphating supply composition, the electrolytic phosphating supply tablet, the electrolytic phosphating supply composition and the electrolytic phosphating supply tablet which are prepared from the phosphating waste residues by converting the phosphating waste residues generated by traditional dipping phosphating into the electrolytic phosphating supply tablet, and the method and the application of the electrolytic phosphating supply composition and the electrolytic phosphating supply tablet, resource utilization of hazardous wastes is achieved, and environmental pollution and resource waste are reduced.

The invention relates to a biodegradable implant comprising a surface-coated magnesium alloy product, wherein the coating layer contains oxides and / or phosphates of rare earth elements, Mg, Ca, Zn, Zr, Mn, or Ag, and wherein the coating is preferably produced by plasma electrolytic oxidation (PEO). The invention further comprises a method for producing the coated magnesium alloy product of the implant.

The invention relates to a flow probe for the instrumental analysis of a measurement fluid (2) using infrared spectroscopy based on the principle of attenuated total internal reflection, as well as a device and a method for instrumental process bath analysis. The flow probe comprises an IR emitter (3), an internal reflecting element (5), an IR detector (4), and a flow cell enclosed by a flow cell wall (1), wherein the internal reflecting element (5) contacts the measurement fluid (2) with a first reflective surface (5.1). A reflection-enhancing support element (6) rests against an opposing second reflective surface (5.2) of the internal reflecting element (5). The solution according to the invention enables a compact, robust, and real-time analysis of process media, in particular for monitoring chemical parameters in industrial process baths.