787 results about "Chrome plating" patented technology

The invention comprises a process of preparing a non-conductive substrate for subsequent metalization. The process replaces the traditional chromic acid etching step with an etching solution comprising a permanganate and a mineral acid. The process also includes a novel activation solution comprising a palladium salt and an amine complexor. The new process of the invention is more environmentally friendly than the traditional chromic acid etching solutions but achieves a comparable result on most non-conductive substrates.

A process for chrome plating magnesium and its alloys. The process uses a combination of electroless nickel plating, a multi-stage copper coating transition system and multiple layers of electrodeposited nickel to form a corrosion resistant system of substantial impermeability and interlayer adherence suitable for direct chromium electroplating.

The present invention is to provide a chrome-plated part having a corrosion resistance in normal and specific circumstances and not requiring additional treatments after chrome plating, and to provide a manufacturing method of such a chrome plated part. The chrome -plated part 1 includes: a substrate 2; a bright nickel plating layer 5b formed over the substrate 2; a noble potential nickel plating layer 5a formed on the bright nickel plating layer 5b. An electric potential difference between the bright nickel plating layer 5b and the noble potential nickel plating layer 5a is within a range from 40 mV to 150 mV. The chrome-plated part 1 further includes: a trivalent chrome plating layer 6 formed on the noble potential nickel plating layer 5a and having at least any one of a microporous structure and a microcrack structure.

The invention relates to an anticorrosive wearable electrodeposit clad layer of Ni-W-P ternary alloy and manufacturing technique and electroplates liquid thereof, which takes the nickel sulfate, sodium tungstate, phosphate as the main material, electrically depositing the Ni-WP amorphous mixture of amorphous or nanocrystalline alloy coating. The characteristics of the electroplate technique are following: corrosive solution is very small, the entire production of the use of cleaner production, less emissions, in line with the requirements of sustainable production. W of the coating for the content of 1-45wt%, P content of 0.1-5wt%, nickel is the residue. The plating layer is bright and dense; the hardness is 400-1100Hv, which is resistant to acid, alkali, salt and hydrogen sulfide corrosion, wear resistance is better than or equivalent to chrome plating, can not only replace decorative chromium or hard chromium is widely used, and can be used for oil field exploration equipment to deal with wear-resistant anti-corrosion.

A modular air intake system is presented. The system comprises a variety of modular components that may be coupled together to form a desired air intake system configuration for an automobile engine. Each modular component has a plastic structure with chrome plating, resulting in improved insulation and heat reflection characteristics for better engine performance. An intake system may be configured to fit into virtually any automobile engine compartment, because the components may be coupled in any combination, and the angular connection relationship between any two components is adjustable. A locking split-collar may be used to lock the junctions between modular components to provide a fixed configuration.

The invention relates to a metal surface multilayer nickel plating process with excellent corrosion resistance. The manufacture process comprises the following steps of: plating a semi-bright layer firstly, plating a high-sulfur layer secondly, plating a bright layer thirdly and plating a nickel sealing layer fourthly from inside to outside. By adopting the technical scheme, the invention has the advantages of improving plating covering effect of a low current area, increasing the potential difference among nickel layers, protecting a matrix, slowing down the corrosion and greatly strengthening the corrosion resistance of the matrix by adopting the low concentration multilayer nickel (semi-bright nickel, high-sulfur nickel, bright nickel and nickel sealing) plus chrome plating process in an electroplating process, and by adopting the semi-bright nickel plating at the bottom layer, excellent leveling capability and scalability can be obtained, a plating solution is easy to control, harmful products cannot be produced after long-time operation, and the plating contains no sulfur and has higher corrosion resistance.

The invention aims at providing a trivalent chromium plating solution composite, preparation and chromium plating process thereof. The plating solution composite comprises main salt, conductive salt, a pH stabilizing agent, a complexing agent, a wetting agent and a displacement agent; and five addition agents of a cylinder opening agent, a stabilizing agent, a bending agent, a modifying agent and a regulating agent are adopted and added to the main salt, the conductive salt, the pH stabilizing agent, the complexing agent, the wetting agent and the displacement agent to be prepared into the plating solution composite. The chromium plating process adopting the plating solution composite has characteristics of high current efficiency, good displacement performance, simple management, lower cost and the like; the obtained plating layer is bright and is close to a product obtained through a hexavalent chromium process in color and lustre.

The invention provides a copper foil surface passivation liquid which comprises one or more compositions selected from benzotriazole and benzotriazole derivative, and one or two compositions selected from soluble zinc salt and soluble nickel salt and has the pH value of 1-7. A copper foil surface treatment method comprises the following steps of: (1) preserving the temperature of the passivation liquid at 25-45 DEG C; (2) spraying the passivation liquid to the surface of a copper foil for 2-10 seconds; (3) uniformly distributing the passivation liquid on the surface of the copper foil by a water extrusion roller; and (4) drying at the temperature of 110-180 DEG C for 2-10 seconds. The invention also provides the copper foil. The oxidization resistance temperature of the surface of the copper foil is 213 DEG C, and the oxidization resistance can be maintained for 120 minutes at the temperature of 213 DEG C. According to the conventional passivation technology, the surface of the copper foil is passivated by a chromium plating mode, and sexavalence chromium ions contained in the electroplating liquid pollute the environment; and the surface of the copper foil is passivated by the chromium-free passivation liquid, so that the waste liquid cannot pollute the environment.

Mechanical systems having anti-stick mediums applied thereto are provided. In one aspect, exhaust gas recirculation (EGR) valve systems having anti-stick mediums applied thereto are also provided. The anti-stick medium can be applied to any contacting surface, such as but not limited to the valve surface and / or the valve seat surface. The anti-stick medium is intended to prevent the valve surface and the valve seat surface sticking or bonding together, especially with respect to the operation of cooled or cold side EGR systems. If any materials should stick to the anti-stick medium, a portion of the anti-stick medium will break away from the surface, allowing the surface and / or component to function normally. The anti-stick medium can include, without limitation, boron nitride coatings, boron nitride aerosols, boron nitride greases, thin dense chrome platings, perfluoroalkoxy, and combinations thereof.

The invention provides an output shaft chrome plating method and an output shaft chrome plating fixture. An output shaft comprises a cylindrical main body, and an outer circle area for chrome plating and an inner circle area for chrome plating are arranged at the first end of the main body. The fixture comprises a fluororubber sleeve, a lower cover plate, an upper cover plate and an anode center pole, the fluororubber sleeve shields an inner circle surface of a non-chrome-plating window area, and the anode center pole is connected with the upper cover plate and the lower cover plate. An insulating sleeve is arranged at the joint between the anode center pole and the upper cover plate. According to the chrome plating method, the special chrome plating fixture is provided, integral assembly and suspension are adopted, component matching tightness is achieved, anode positions for inner circle plating are fixed, the plating thickness of an inner circle is uniform, and the phenomenon that part of a chromium layer of an inner hole is too thin to grind is prevented; the method is simple and rapid to operate, the inner circle and an outer circle can be plated with chrome by the same fixture at a time, processing cycle of components is shortened greatly, repair rate of the components is reduced and production efficiency is improved.

A cutting tool having a hard tip is pressed with a uniform pressure against a surface of a vehicle wheel as the wheel is rotated to smooth and seal the surface. The smoothed and sealed wheel surface is then chrome plated with a process that includes applying a nickel layer directly upon smoothed and sealed wheel surface and a chromium layer over the nickel layer.

A process for chrome plating magnesium and its alloys. The process uses a combination of electroless nickel plating, a multi-stage copper coating transition system and multiple layers of electrodeposited nickel to form a corrosion resistant system of substantial impermeability and interlayer adherence suitable for direct chromium electroplating.

The invention discloses a large forged high-speed steel cold roll and a manufacturing method thereof. The cold roll comprises the following chemical constituents in percentage by mass: 0.90-1.20% of C, 0.20-1.20% of Si, 0.20-1.00% of Mn, 6.00-12.00% of Cr, 2.00-5.00% of Mo, 1.00-4.00% of V, 0.80-2.00% of W, not greater than 0.80% of Ni, not greater than 0.02% of P, not greater than 0.02% of S, and the balance of Fe and inevitable impurities. The manufacturing method for the cold roll comprises the process steps of steel ingot refining, billet forging, pre-heat treatment, machining, final heat treatment and the like. The surface layer hardness of a roll body of the cold roll manufactured by the manufacturing method disclosed by the invention is 88-98 HSD; the cold roll is excellent in wear resistance, high in roughness holding capacity and high in structure stability. According to the manufacturing process disclosed by the invention, chroming process steps are reduced and production cost is decreased.

The invention relates to a process of repairing a MCrAlY-coating of an article, which has being exposed to the hot gases of, for example, a gas turbine. The MCrAlY-coating is examined and repaired only locally where it is needed and then, subsequently, on top of the MCrAlY-coating the article is aluminized and / or chromized, avoiding the stripping of the whole coating and re-coating over the entire surface of the article. This is for replenishing the coating of Al and / or Cr that become depleted during engine operation, in an easy, cost and time saving manner.

The invention discloses a steel pipe tandem rolling restraint mandril preparing method, which comprises the following steps: forging / rolling blank; annealing outright; hot straightening; rough / semi-finish; heat hardening; (twice) high tempering; grinding belt; chrome plating; dehydrogenating. The invention reduces the material cost, which improves the blank yield.

The invention relates to an electroplating process for an automobile central controller. The electroplating process comprises the steps of pretreatment, nickel preplating, copper replacement, acid copper plating, semi-finished nickel plating, pearl nickel plating, nickel sealing, chromium plating and drying. In addition, acid activation treatment is added before both the steps of semi-finished nickel plating and chromium plating, and acid pickling is added before the step of pearl nickel plating. Meanwhile, an F90R color scheme is selected and used as the color scheme of pearl nickel, and the pearl nickel is formed by mixing K5 with the concentration being 0.06 ml / L and K6Al with the concentration being 0.4 ml / L. The electroplating process for the automobile central controller has the advantages that mixed liquid of copper and sulfuric acid is adopted for copper replacement, so that cleanliness and flatness of the surface of a to-be-plated product are improved; in addition, an acid pickling procedure or an acidification procedure is added before all the plating steps, thus binding force between coatings can be improved, and separation between the coatings is reduced; meanwhile, specific to the A10 automobile central controller, the pearl nickel of the F90R color scheme is selected and used; and in the pearl nickel plating process, the concentration requirements of the F90R color scheme always needs to be kept, and thus the color of the product is uniform.

The present invention discloses surface quenched chrome plated wound and welded roller making process, which includes the steps of hot winding, bottoming welding and processing bevel, coarse turning, surface quenching, semi-finish turning, assembling welding, finish machining and post-treatment. The process of the present invention is suitable for making roller of 500-1200 mm diameter, 25 mm wall thickness and 2050-2200 mm length, and roller surface is treated through quenching, sand blasting to roughen and chrome plating. The present invention has the advantages of saving in material, low making cost and short production period.

The invention discloses a manufacturing method of a gravure roller capable of printing a three-dimensional effect, and the method comprises the following steps that: a computer image processing technology is applied to analyze the data of an image file which is scanned from an original pattern; the image data which can highlight the three-dimensional effect can be determined according to the content of an image; an image color separation technology is adopted to extract the image data which can highlight the three-dimensional effect, and the data is made into the image file; the image is carved on the gravure roller through an electronic carving machine; and finally mesh holes which are carved on the gravure roller and lined into the pattern are etched to required depths, and the gravure roller capable of printing the three-dimensional effect is manufactured by chrome plating. After the gravure roller which is manufactured through the method prints transparent ink onto the surface of a plane pattern which is printed from an original, the pattern can show a significant three-dimensional visual effect and intense concave and convex texture for touching.

Grain oriented electrical steel sheet with a very low iron loss and a method for producing the same, wherein the surface of the iron substrate of the grain oriented electrical steel sheet is subjected to an enhancement treatment of crystal grain orientation or surface smoothing to a mean roughness of about 0.20 mu m or less, electroplating a chromium plating layer on the substrate with heterogeneous growth, and applying a tension coating film to the plating layer.

The simplified process for electroplating non-metal material surface includes the steps of chemically deoiling the surface of non-metal material, spraying conducting paint for metallizing the non-metal material, and final electroplating copper, nickel or chromium. The conducting paint consists of filming resin 20-40 wt% , flaky conducting metal powder 28-40 wt%, coupler 0.5-2 wt%, orientating arranging agent 1-1.25 wt%, mixed diluent 20-40 wt% and assistant 0.5-2 wt%. The process is simple, low in production cost, high in work efficiency and environment friendship, and may be used in matallizing various non-metal material with complicated shape.

A technology for making high-precision super-thin very-wide cold-rolled steel band and the chrome-plated steel band dedicated as shield of optical cable includes treating the surface of hot-rolled raw band, cold rolling with large-diameter 4-roller reversible cold rolling mill to make its thickness to be 0.1-0.25 mm, recoiling, degreasing, bright annealing, cold rolling again to make its thickness to be 0.06-0.08 mm to obtain said high-precesion steel band, chemical degreasing, washing, electrolytic degreasing, pickling, plating chrome, washing, plating chrome again, washing, baking and coating oil to obtain the said shield of optical cable.

The invention discloses a manufacturing process of a corrosion-resistant piston rod of a shock absorber for a vehicle, comprising the following steps of: (1) blanking; (2) straightening for the first time; (3) grinding for the first time; (4) quenching; (5) tempering; (6) straightening for the second time; (7) grinding for the second time; (8) finely turning; (9) punching a mounting hole; (10) finely grinding; (11) polishing a resin grinding wheel; (12) supergrinding; (13) checking poriness; (14) automatically plating an upper suspension of a chrome wire workpiece; (15) electrolytic degreasing before the plating: carrying out the electrolytic degreasing on the workpiece as an anode in a lye tank; (16) etching the anode; (17) microcrack hard chrome plating: enabling a plating solution to flow from bottom to top in a plating tank till the plating solution overflows out of the plating tank; (18) cleaning; (19) automatically plating a lower suspension of the chrome wire workpiece; (20) removing hydrogen; and (21) supergrinding after the plating. The invention can effectively enhance the corrosion resistance of the piston rod, ensure the finished product ratio and prevent from generating hydrogen embrittlement, thereby enhancing the safety of the piston rod.

The invention relates to a printing roller manufacturing technology, and concretely relates to a manufacturing process for a printing roller multi-depth foaming forme. The process comprises steps of mechanical processing, nickel plating, grinding, manuscript manufacturing, glue spraying, laser engraving, and corroding. The process is characterized in that: secondary glue spraying processing, secondary laser engraving processing, secondary corrosion processing and chrome plating processing are carried out after the corrosion step. Compared with the prior art, different patterns can have different depths on the printing roller as needed in the invention, so embossing effects on pure raw paper and nonwoven paper which can reach embossing effects on rubber surface wallpaper have rich stereoscopic and layered sense.

The invention relates to a method for engraving a gravure grinding roller by laser, which is applied to realizing gravure grinding printing. The method comprises the following specific manufacturing steps of (1) rubber coating, (2) rubber sintering, (3) corroding, (4) rubber removing, (5) chromium plating, and (6) checking. The method for engraving a gravure grinding roller by laser, disclosed by the invention, has the advantages that the depth requirement is strict, and 0.05mesh of net points can be controlled so that the printing ink content of each net point is uniform in a printing process; after the printing ink is subjected to gravure transfer printing, the thickness of a whole layout can be uniform, the leveling is good, the concave-convex feeling can be generated; compared with a silk screen manner, the gravure printing manner has the advantages of good third dimension, large printing format, high speed and high efficiency; and the thickness of the printing oil can be precisely controlled, the waste is reduced and the environment protection is realized.

The substituting nickel coating chrome technique comprises: removing dirt to coat piece surface; roughing, sensitizing, activating and reducing to the coat piece; chemical coating nickel and copper; substituting nickel by trivalent chromium. This invention integrates techniques, overcomes opposite difficulty, and makes the coat layer has well hardness and clean.

An improved bumper facebar, as well as a method of manufacturing the improved bumper facebar, are disclosed. The bumper facebar includes a steel body having at least one area with improved strength exhibiting selective austinitic-martensitic hardening and a Rockwell hardness greater than 41. Moreover, the steel body includes a metallic coating or plating such as chrome plating to provide a decorative finish. The austinitic-martensitic hardening is not exhibited in the steel at those points providing coupling to other objects. The method of manufacturing the improved bumper facebar includes the steps of stamping a bumper blank from a sheet of steel, forming the desired bumper shape from the bumper blank, and hardening select portions of the bumper shape by heating and cooling the select portions to produce a rockwell hardness greater than 41. The method is well adapted to receive additional steps to improve the facebar hardness and impact characteristics.

The present invention discloses a decorative chromium plating process capable of improving corrosion resisting property of decorative chromium composite plating. Said method comprises mainly the following steps: oil removing, activation, nickel electric plating, chemically composite plating, chromium electric plating, plating the electric plating nickel layer with a chemical composite deposite containing non-conductive solid particles, and then electric-plating the chemical composite deposite containing non-conductive solid particles with chromium to form micropore chromium. The present invention possesses the beneficial effects as follows: regardless whether or not the part external shape is complicated, chrome plating micropores are equispaced and exhibits a special performance of uniform corrosion current dissipation, the thickness of the electric plating nickel layer is reduced, and then corrosion resistant level of decorative chromium compages plating is improved remarkably.

The invention relates to a piston ring and a surface spongy tin plating technique thereof. The technical scheme thereof is as follows: the surface of a piston ring body is provided with a chromium plating layer, the outer surface of the chromium plating layer is provided with a spongy reticulate pattern, and the outer surface of the spongy reticulate pattern is provided with a tin plating layer. The invention comprises the following procedures: preplating, etching, chromium plating, washing, removal of hydrogen, hole loosing, washing and drying and tin plating treatment. The invention utilizes a reticulate pattern groove on the surface of the piston ring to store lubricating oil, thus greatly reducing the friction coefficient between the piston ring and a cylinder sleeve, improving oil absorbing property, and prolonging the service life of the piston ring and the cylinder sleeve; and compared with the prior art, the invention prolongs the service life of the piston ring and the cylinder sleeve by more than three thousand hours, improves the power of an internal combustion engine by more than 30 percent, saves oil by 25 percent, is capable of reducing the exhaust amount of gas / smoke of the internal combustion engine, reduces the environment requirements of atmosphere pollution, solves the mechanical wear of the piston ring during running-in period and obtains more perfect use performances.

The invention discloses an uniformization aligning mark combination and an aligning method and an aligning system thereof. The uniformization aligning mark combination consists of a porous uniformization aligning mark arranged at the target composing component of a photoetching device aligning system and a single-pore uniformization aligning mark arranged at a probe composing component. The porous uniformization aligning mark consists of four transparent elements and a chromeplated shielding layer. The single-pore uniformization aligning mark consists of a transparent element and a chromeplated shielding layer. The method uses the single-pore uniformization aligning mark at the probe composing component and a probe device under the single-pore uniformization aligning mark to process twice two-dimensional aligning scanning to an image formed by the porous uniformization aligning mark at the target composing component, and radiation measure information and position measure information obtained by the two times of canning are integrated for an aligning signal processing, which obtains the position relation of a space image formed by the target composing component at a target composing component bearing table through a projection system relative to a probe composing component bearing table.