605 results about "Nickel electroplating" patented technology

The present invention relates to an aqueous zinc-nickel electroplating bath, including water; nickel ion; zinc ion; at least one complexing agent; and at least one non-ionogenic, surface active polyoxyalkylene compound, wherein the bath has an alkaline pH. In one embodiment, the zinc ion, the nickel ion and the non-ionogenic surface active polyoxyalkylene compound are present at concentrations sufficient to deposit a zinc-nickel alloy comprising a substantially gamma phase.

The invention relates to a combinational electroplating process on a magnesium alloy motorcycle wheel nave by adopting a non-cyanide and chrome free pre-plating treatment solution, electronickelling and pyrophosphate copper are adopted as dual-layer bottoming coat, then Cu/Ni/Cr combinational coat electroplating is performed, to obtain the Cu/Ni/Cr combinational metal coat with high corrosion resistance on the surface of the magnesium alloy motorcycle wheel nave. The binding force of the metal coat obtained on the surface of the magnesium alloy motorcycle wheel nave by adopting the process is strong, the corrosion resistance is high, and the combinational electroplating process has the prominent advantages that the personnel health is safeguarded, and the environmental pollution is avoided.

The invention relates to an electromagnetic shielding compound material made from three-dimensional braided nickel-plated carbon fiber and epoxy resin and a method for preparing same. The method comprises the following steps: carbon fiber surface treatment, carbon fiber nickel-electroplating, nickel-plated carbon fiber three-dimensional braiding, and compound material preparation on the basis of RTM (resin transfer molding) method and electromagnetic shielding effectiveness test. In the invention, the nickel-plated carbon fiber/epoxy resin braided compound material is prepared through the following steps: plating the carbon fiber with nickel, the metal; carrying out three-dimensional four-directional braiding; and then, compounding the nickel-plated carbon fiber braid and the epoxy resin. Owing to the good conductivity of the carbon fiber braid and the nickel-plated layer and the ferromagnetism of the nickel-plated layer, the braided compound material has good electromagnetic shielding performance. According to the test results based on the flange co-axial method, the electromagnetic shielding level of the braided compound material reaches 70dB to 80dB.

The invention discloses a magnesium alloy with zinc and nickel compound plating layers and a preparation method thereof. A zinc plating layer of the magnesium alloy is taken as a bottom layer with the width between 20 microns and 25 microns, a nickel plating layer is taken as a surface layer, and the total width of the zinc plating layer and the nickel plating layer is less than or equal to 40 microns. The method comprises the following steps: firstly, plating preliminary treatment, i.e. zinc is activated in an acid solution and then soaked in sulphate; secondly, zinc electrodeposition, i.e. after the zinc is soaked in the sulphate in the first step, the zinc layer of the magnesium alloy is electrodeposited; thirdly, nickel bright plating, i.e. the magnesium alloy which is nicely processed in the second step is brightly plated with nickel in a nickel plating solution; fourthly, sodium silicate water solution sealing. With the method, the obtained zinc plating layer is nicely combined with a base body, has uniform width and high corrosion resistance, can be taken as a protective plating layer to be singly used and can be also taken as a transition layer to carry out plating or chemical plating or other protective or decorative platings, and the nickel plating layer obtained from the zinc plating layer by plating is nicely combined with the zinc plating layer and is uniform, exquisite, bright and beautiful.

The invention relates to a method of manufacturing an Al or Al alloy workpiece, including the steps of (a) providing an Al or Al alloy workpiece, (b) pre-treating of the outersurface of the Al or Al alloy workpiece, and (c) plating a metal layer including nickel onto the outersurface of the pre-treated Al or Al alloy workpiece. During step (c) the metal layer including nickel is deposited by electroplating both nickel and bismuth using an aqueous bath comprising a nickel-ion concentration in a range of 10 to 100 g/l and a bismuth-ion concentration in the range of 0.01 to 10 g/l. The invention further relates to an aqueous plating bath for use in the method of this invention.

The invention discloses a nickel electroplating liquid, and a preparation method for a super-hydrophobic nickel plating layer using the same. The nickel electroplating liquid is composed of a choline-chloride-based ionic liquid used as a solvent and NiCl2.6H2O or NiCl2 used as a solute, wherein the mol concentration of the solute is 0.1-3 mol/L. The preparation method for the super-hydrophobic nickel plating layer using the nickel electroplating liquid comprises the following step of electroplating in the nickel electroplating liquid with pure nickel as an anode and the workpiece to be electroplated as a cathode at the temperature of the nickel electroplating liquid from room temperature to 200 DEG C and electroplating voltage of 0.2-2 V. The nickel electroplating liquid provided by the invention has simple components, is convenient to prepare and is environmentally-friendly. The preparation method for the super-hydrophobic nickel plating layer using the nickel electroplating liquid has the advantages of simple and controllable process, no corrosive substances and no vapor discharge during the electroplating process, and is beneficial to mass production. More prominent characteristics are that the obtained nickel plating layer has super-hydrophobic property, a contact angle larger than 160 degrees and a sliding angle smaller than 2 degrees.

The invention relates to a production process for electroplated abrasive material on the surfaces of a metal wire. The production process comprises the following steps: 1. carrying out chemical nickel plating treatment on the surface of a diamond; 2. preparing impactive nickel electroplating solution; 3. preparing sulfamic acid nickel plating solution and nickel-plated diamond mixed electroplating solution; 4. cleaning; 5. carrying out impactive nickel electroplating; 6. electroplating the nickel-plated diamond on the surface of the metal wire; 7. reinforcing nickel-plated diamond granules; and 8. carrying out post-electroplating treatment. The invention employs the diamond and the metal wire the surfaces of which are chemically nickel-plated as raw materials, and realizes high-speed production by using sulfamic acid nickel plating solution. The binding of the nickel-plated diamond and a nickel plating layer is identical nickel-material binding, and belongs to identical nickel-metal atomic force binding, so that the diamond has high firmness, long service life and high sawing capability.

A nickel electroplating bath is disclosed which is suitable for plating, a base layer of nickel over zinc or zinc alloy parts. Subsequent plating onto this base layer can be achieved with copper, chromium or bright nickel with good adhesion and appearance. The nickel electroplating solution proposed comprises an additive package comprising (i) sulphonic acid or sulphonic acid salts, (ii) sulfonated alkoxylate and (iii) organic acid selected from the group consisting of tolylacetic acid, salicylic acid, hydroxy-benzoic acid, benzyloxyacetone and mixtures of the foregoing.

The invention provides a method for electroplating a plastic base material and relates to a plastic surface processing method. The invention provides the method for electroplating the plastic base material, which can realize a surface metallization of a plastic material, simplifies an electroplating process flow, greatly reduces a discharging amount of waste water, reduces pollution to the environment and the human, and is suitable for various plastic surface requirements. The method comprises the following steps of: pre-treating the plastic base material; carrying out physical vapor deposition metallization on the treated plastic base material and sequentially carrying out physical vapor deposition plasma modification, and plating a metal bottom layer, a metal transition layer and a metal conducting layer; directly electroplating copper on the treated plastic base material or electroplating copper and electroplating nickel on the treated plastic base material; carrying out drawing treatment on the surface of an electroplated copper layer of the treated plastic base material or carrying out the drawing treatment on the surface of an electroplated copper and electroplated nickel layer of the treated plastic base material; and after hanging the treated plastic base material into a PVD (Physical Vapor Deposition) furnace to carry out plasma treatment, depositing a chromium layer or carrying out dry type dust removal and static removal on the treated plastic base material and then carrying out organic coating protection treatment on the treated plastic base material.

The invention provides a zinc-zinc nickel electroplating method of a neodymium iron boron magnet. The method comprises the steps of grinding and chamfering-deoiling-acid pickling-ultrasonic cleaning-galvanizing (acid)-activation-nickel alloy galvanizing-bright dipping-trivalent chromium passivation-drying. A neodymium iron magnet is prepared by the zinc-zinc nickel electroplating method of the neodymium iron boron magnet; a zinc layer is 2-5 microns; a zinc nickel layer is 5-10 microns; the corrosion resistance is achieved under the neutral salt mist environment for 2h and the environment of 40 DEG C and 90% of humidity for 168h; the binding force of the neodymium iron boron magnet can satisfy the requirement of falling by 1.8 m*30 times; the magnetic reducing loss is not increased (not more than 6%); the hexavalent chromium problem is solved (hexavalent chromium is not more than 1000 ppm); and the cost is lower than that of nickel electroplating of copper nickel.

A family of low temperature brazing alloys wherein the alloy is utilized in the form of a filler metal or shim and consists of electroplated nickel on zinc shimstock, wherein the zinc shimstock includes zinc, aluminum and silicon, with or without a small amount of lead, tantalum or bismuth. The use of the brazing alloys for joining aluminum parts together or an aluminum part to a part of another metal, such as brass. Further, metallic coating could be thermally spray coated and powder metals could be utilized as the filler materials with equally acceptable brazing techniques. Using these techniques, the brazing could be accomplished at a temperature in the range of 750 to 1050° F.

The invention discloses a method for producing a nickel-plated carbon fiber board having electromagnetic shielding property. The method includes the steps: step 1, carbon fiber cloth surface treatment; step 2, magnetron sputtering nickel plating of the carbon fiber cloth surface; step 3, copper electroplating of the carbon fiber cloth surface; step 4, nickel electroplating of the carbon fiber cloth surface; step 5, drying; and step 6, board pressing. The nickel-plated carbon fiber plate has the electromagnetic shielding effectiveness of more than 40 dB in a 150 kHz-18 GHz electromagnetic field, and the stability of the electromagnetic shielding effect of carbon fiber cloth can be effectively improved through the nickel-copper-nickel three-plating-layer structure design; and through the composite material molding, a resin layer on the nickel-plated carbon fiber surface improves the corrosion resistance of the product.

The invention discloses a method for producing a goldfinger via twice electroplating, comprising the following steps: B, carrying out screen printing on dielectric gold oil ink on the lead part of the goldfinger; C, pasting a dry film on the line graph area of a circuit board for protection and exposing the goldfinger part; D, carrying out electronickelling processing on the goldfinger part, forming a nickel layer on the goldfinger, then electroplating flash gold and forming a flash gold layer on the nickel layer; and E, electroplating heavy gold on the goldfinger part and forming a heavy gold layer on the flash gold layer. According to the invention, the nickel layer, the flash gold layer and the heavy gold layer are successively electroplated on the goldfinger, so that the time for electroplating the goldfinger is greatly shortened, the gold leakage caused by contacting with the electroplate liquid for a long time is avoided and therefore the problem of short circuit of the goldfinger caused by gold leakage is solved. In comparison with the prior art, the method disclosed by the invention has high efficiency and short time in electroplating the heavy goldfinger, effectively improves the production efficiency and ensures the quality of the product.

The invention discloses a selective nickel and gold plating method comprising the steps that a first dry film is covered on the surface of a copper layer of a PCB, and a area requiring nickel and gold plating is exposed out of the surface of the copper layer of the PBC via exposure and development; micro-etching and copper reduction are performed on the copper layer of the area requiring nickel and gold plating; and then nickel and gold are plated on the copper layer of the area requiring nickel and gold plating, then the first dry film is removed, and a required line is manufactured on the copper layer of the PCB. According to the method, nickel and gold are firstly plated on the surface of the copper layer of the PCB, and then the line is manufactured so that a lead wire for plating does not need to be manufactured in the overall implement process, and a problem of difficulty in nickel and gold plating on the PCB caused by the fact that the lead wire for plating cannot be manufactured on the PCB is solved. Besides, micro-etching and copper reduction are performed on the copper layer of the area requiring nickel and gold plating so that height difference between the nickel and gold surface of the nickel and gold area and the surface of the line without nickel and gold plating is reduced, and thus combination force of the dry film and the surface of the PCB in the subsequent dry film covering technology is enhanced.

The present invention discloses a preparation method for an electricity conductive cloth and the electricity conductive cloth. The preparation method comprises the following steps: carrying out a catalytic treatment, wherein an ionic palladium solution is adopted to carry out a pretreatment on the surface of an original cloth; carrying out chemical copper plating, wherein chemical copper plating is performed on the surface of the original cloth; carrying out copper electroplating, wherein copper electroplating is performed on the original cloth, and a thickening treatment is performed on the copper layer of the original cloth; and carrying out nickel electroplating, wherein a nickel layer is electroplated on the surface to provide protection for the copper layer. With application of the method of the present invention to produce the electricity conductive cloth, equipment investment is less, and a copper electroplating layer is adopted to carry out thickening on the copper layer of the product, such that a cost of the copper electroplating process is less than a cost of a complete chemical copper plating process, and the resulting product has characteristics of low electric resistance, low internal stress of the plating layer, and good ductility so as to provide advantages of low cost, high yield, low electric resistance of the product, excellent adhesion and the like.

A solid oxide fuel cell (SOFC) system included high thermal conductivity materials such as copper to increase thermal energy transfer by thermal conduction. The copper is protected from oxidation by nickel electroplating and protected from thermal damage by providing Hastelloy liners inside combustion chambers. Monel elements are used in the incoming air conduits to prevent cathode poisoning.

The invention discloses a process method for electroplating nickel on an aluminum-copper composite material component. The process method can be utilized to obtain a nickel-coated layer with good binding force on the surface of the aluminum-copper composite material component. The process method is realized by the following steps: (a), alkaline corrosion; (b), bright dipping, wherein a clean basal body is obtained by primary bright dipping and secondary bright dipping; (c), zinc immersion, wherein a layer of zinc is uniformly immersed and coated for the aluminum-copper composite material component in sodium hydroxide, zinc oxide, tartrate, ferric trichloride and sodium nitrate solution; and (d), nickel plating, wherein an uniform nickel layer is deposited on the surface of the aluminum-copper composite material component in citrate solution by using an aluminum-copper composite material as a cathode and galvanizing with cathode current. According to the process method disclosed by the invention, the nickel-plating liquor is stable in component, good in dispersing capability, small in corrosion to aluminum base of the aluminum-copper composite material and capable of effectively avoiding corrosion of the aluminum-copper composite material in an nickel-electroplating process, so that a problems of corrosion to aluminum layer substrate and the aluminum-copper composite part and poor binding force with a coating when the aluminum-copper composite material is electroplated with nickel are solved.

The invention relates to a matrix of a diamond product and a plating process thereof. The matrix is characterized in that the matrix consists of electroplated iron or iron-nickel alloy. Electroplating solution adopted by the plating process comprises ferrous sulfate and other sulphates, ferrous chloride and other chlorides, or nickel sulfate, the ferrous sulfate and the chloride. The matrix has the beneficial effects that all of the electroplated iron, the iron-nickel alloy containing 30 to 60 percent of iron and other ferroalloy have higher hardness (HRC35-50) and good bezel setting property for the diamond. Though the matrix is worse than electroplated nickel in wear-resisting property, the matrix is in favor of the exposure of the diamond product and improves the sharpness of the diamond product. Therefore, the matrix is especially suitable for manufacturing the drill pit and the sharper of the diamond. As the cheap iron replaces the expensive nickel, the manufacturing cost of the electroplated diamond product is greatly reduced.