9 results about "Double plating" patented technology

The invention belongs to the technical field of metal material surface treatment, and discloses a production process of a weldable electroplated chromium plate. According to the process, cluster-shaped peak morphology is transferred on the surface of a cold-rolled steel coil through a laser texturing roller, and staged double-layer chromium electroplating is combined, specifically, a discontinuous chromium layer is formed on the top of a micro convex peak through first-time high-current pulse electroplating, and local iron leakage points are reserved; the second low current direct current plating covers an ultrathin continuous chromium film to maintain macro passivation. According to the invention, a composite functional structure with both macroscopic passivation integrity and microcosmic conductive selectivity is constructed on the surface of chromium-plated iron by accurately controlling the microstructure of the surface of a base material and double-layer chromium plating process parameters, so that the technical bottleneck of the chromium-plated plate in resistance welding application is effectively solved, collaborative optimization of weldability and corrosion resistance is realized, and the application range of the chromium-plated plate in resistance welding is widened. And a reliable technical path is provided for comprehensive replacement of chromium-plated iron in the field of metal packaging.

The invention discloses a self-repairing galvanized aluminum-magnesium steel plate coating alloy design method and a hot dipping process, and relates to the technical field of alloy design, the method comprises the following steps: calculating crystallization pressure safety redundancy according to the maximum chlorine salt concentration and thermodynamic temperature of a working state area; calculating the comprehensive interface energy of the double-layer plating layer structure of the to-be-plated steel strip based on the crystallization pressure safety redundancy; quantifying a crack tip passivation factor of an interface crack tip area in the metallurgical bonding interface, and calculating corrected interface energy of the metallurgical bonding interface based on the crack tip passivation factor and the comprehensive interface energy; and salt elimination micro-grooves are formed in the surface of the to-be-plated steel strip, qualification judgment is conducted on the to-be-plated steel strip based on the corrected interface energy, and the micro-groove steel strip is obtained. The salt crystal splitting resistance of the plating layer is improved, and the corrosion resistance service life of the plating layer is prolonged.

The present application relates to a kind of double plating modified diamond heat-conducting composite material, preparation method and application, steps include first pretreatment diamond particles;First surface treatment process is executed to pretreated diamond particles, and the metal carbide plating layer is formed on the surface of the diamond particles;Second surface treatment process is executed to the diamond particles with metal carbide plating layer, and the electroplated metal layer is formed on the surface of the metal carbide plating layer of diamond particles;Subzone preparation mixed powder and obtain subzone powder with electroplated metal layer of diamond particles are mixed with each subzone powder according to different volume, according to the order of filling layer filling, after filling, sintering is formed, to make modified diamond heat-conducting composite material.The present application generates nanoscale metal carbide plating layer TiC layer and Cr3C2 layer by magnetron sputtering on the surface of diamond, which forms covalent bond with diamond, and the interface bonding strength is significantly improved compared with uncoated layer.

The application discloses a surface protection method of a Nd-Fe-B double-plating layer, which comprises the following steps: after a Nd-Fe-B part is subjected to mechanical treatment of surface physical defects and surface oil removal treatment, the Nd-Fe-B part is subjected to ultrasonic treatment in an acid pickling solution; then, a copper layer is deposited on the surface of the Nd-Fe-B part by a physical gas deposition method or a magnetron sputtering method, wherein part of copper atoms diffuse into a surface layer of the Nd-Fe-B part and are distributed in grain boundaries; and a nickel layer is electroplated on the copper layer deposited on the surface of the Nd-Fe-B part. The application optimizes boundary microstructure by depositing the copper layer, and on the other hand, the double-plating layer is preferentially selected to replace a three-layer plating layer structure, so that magnetic shielding generated by the plating layer is reduced; and the new surface protection with high corrosion resistance is realized, which does not affect surface adhesion and greatly reduces loss of magnetic performance or even does not cause loss of magnetic performance.

The utility model belongs to the technical field of electrolysis equipment, and particularly relates to a tungsten filament double-layer electrolytic plating device which comprises a storage tank and two electrolytic baths arranged up and down, and a circulating pipeline is arranged between the storage tank and the electrolytic baths; two first partition plates and two second partition plates are arranged at the two ends of the electrolytic bath, strip-shaped holes are formed in the first partition plates and the second partition plates, a plurality of trays are arranged between the two second partition plates, and plating blocks are arranged on the trays; winding rollers are arranged at the two ends of the electrolytic bath, and a tungsten filament penetrating through the electrolytic bath is wound between the two winding rollers. According to the utility model, the upper and lower double-layer plating tanks are arranged, the winding rollers are arranged at the two ends of the aqueduct, and a tungsten filament passes through the two plating tanks for multiple times after passing through the winding rollers, so that the volume of electroplating equipment is effectively reduced, the volume of plating liquid for plating is reduced, the cost is reduced, and the plating efficiency is improved.

The invention relates to the technical field of alloy steel wires, in particular to a preparation method of a special super-strong alloy steel wire, which comprises the following steps: polishing, alkali washing degreasing, acid washing rust removal and water washing are performed on the alloy steel wire to obtain a pretreated alloy steel wire; the pretreated alloy steel wire is immersed in a plating assisting solution and dried after plating assisting is completed, and a coated alloy steel wire is obtained; and immersing the coated alloy steel wire in Zn-5Al-0.1 Si alloy liquid for primary hot dipping, then immersing the coated alloy steel wire in Zn-5Al-1Mg-0.1 Ce alloy liquid for secondary hot dipping, and carrying out water cooling and drying to obtain the special super-strong alloy steel wire. According to the invention, by optimizing the ratio of the plating assisting liquid and carrying out double hot dipping on the alloy steel wire, double plating layers are formed on the surface of the alloy steel wire, so that the crack resistance and corrosion resistance of the alloy steel wire are improved, and the application range of the obtained special super-strong alloy steel wire in special industries is widened.

The present application relates to the technical field of composite pipe thread brush plating layer, and particularly relates to a corrosion-resistant composite pipe thread brush plating layer and a preparation method thereof.A corrosion-resistant composite pipe thread brush plating layer comprises a bottom nickel layer, the bottom nickel layer is arranged on the surface of the composite pipe thread, the thickness of the bottom nickel layer is 1.0-2.0 microns, and a nickel-tungsten layer, the nickel-tungsten layer is arranged on the upper surface of the bottom nickel layer, and the thickness of the nickel-tungsten layer is 10-15 microns.The present application optimizes the composition structure of the corrosion-resistant composite pipe thread brush plating layer, adopts the structure of the double plating layer of the bottom nickel layer and the nickel-tungsten layer, instead of the technical scheme of the traditional single plating layer, since the nickel-tungsten amorphous alloy plating layer has the same structure, the chemical composition is uniform, so in the actual use process, the passivation protective layer is easy to appear, the corrosion-resistant anions in the external corrosion medium are effectively prevented from passing through the corrosion film through the formed amorphous passivation protective layer, and the phenomenon that the composite pipe thread is corroded is avoided.

The application discloses a super-high corrosion-resistant coated steel plate with good forming performance and a preparation method thereof. The super-high corrosion-resistant coated steel plate comprises a base body and a coating layer. The coating layer is a double-layer structure. The first layer is an electroplating layer, and the second layer is a hot-dip plating layer. The electroplating layer comprises 0.5-1% of Si and the balance of Al in percentage by weight. The hot-dip plating layer comprises 5-15% of Al, 3-8% of Mg, 0.5-0.9% of Si and the balance of Zn in percentage by weight. The application controls the electroplating process, the heating process and the post-plating cooling process by the base body design, the double-layer coating layer structure design and the coating layer component design, so that a suitable structure and phase structure are obtained. The prepared steel plate has good corrosion resistance and processing performance. The corrosion resistance can be 5-20 times of that of a pure zinc product with the same specification. The crack width is less than or equal to 20 microns after 0T bending processing, so that the balance control of the improvement of the corrosion resistance and the forming performance is realized.

A kind of stranding equipment of corrosion-resistant overhead line, including horizontal arrangement frame stranding machine, electrolyte pool one and electrolyte pool two, steel core is sequentially passed through frame stranding machine, electrolyte pool one and electrolyte pool two.Electrolyte pool one side wall has stranding reel one and stranding reel two, electrolyte pool two side wall has stranding reel three.Aluminum conductor is sequentially passed through stranding reel one, stranding reel two and stranding reel three after being led out from frame stranding machine and enters electrolyte pool two.Frame stranding machine rotates around steel core, and each stranding reel rotates synchronously with frame stranding machine to stranding aluminum conductor on steel core.A kind of stranding equipment of corrosion-resistant overhead line of the utility model, improves the stranding mode of the frame stranding machine and the plating pool upper and lower stacking of existing, frame stranding machine and double plating pool system horizontal arrangement, equipment installation, aluminum conductor loading more simple, electrolyte circulation system can be set in same plane with electrolyte pool, reduce the fall of electrolyte pool in electrolyte circulation system and reduce water pump energy consumption.