8 results about "Electrogalvanization" patented technology

This invention belongs to the field of secondary utilization technology of metal resources, specifically relating to a method for treating waste liquid from electroplating zinc-nickel alloys. The method includes the following steps: S1, mixing the waste liquid from electroplating zinc-nickel alloys, oxygen, and a catalyst, and performing an oxidation reaction to obtain an intermediate liquid and nitrogen; the oxidation reaction temperature is ≥220℃; S2, adjusting the pH of the intermediate liquid to 13.0-13.5, performing a first filtration separation to obtain nickel hydroxide sludge and filtrate 1; S3, adjusting the pH of filtrate 1, performing a second filtration separation to obtain zinc hydroxide sludge and filtrate 2. This invention first degrades COD to obtain zinc and nickel ions; adjusting a specific pH value generates nickel hydroxide sludge, with zinc ions existing in the system as polyhydroxy zinc anions, achieving separation of nickel and zinc; further adjusting the pH separates zinc from the system as zinc hydroxide sludge precipitate. The operation is simple, with high separation efficiency and high purity.

The application discloses a magnesium alloy zinc electroplating method and belongs to the technical field of magnesium alloy surface treatment. The method comprises the following steps: 1. substrate pretreatment: AZ31B magnesium alloy is polished by sandpaper and then is washed by anhydrous ethanol and dried; 2. alkali washing: the micro specific surface area of the substrate is increased, and the mechanical bite effect of the coating and the substrate is strengthened; 3. acid washing activation: a protective film is formed on the surface of the magnesium alloy, so that the alloy is not corroded in the electroplating solution; 4. pre-plating zinc: an initial zinc layer with uniformity, compactness and strong adhesion is rapidly established on the surface by adopting impact current; and 5. zinc electroplating: the magnesium alloy with the initial zinc layer is electroplated. The zinc coating of the magnesium alloy is uniform and compact and is silver-white. The process is synergistically controlled by pretreatment and impact current pre-plating, the coating is uniform and compact, is bright silver-white, is firmly combined with the substrate and is not easy to peel off, and the obtained zinc coating has excellent corrosion resistance and welding adaptability.

The utility model discloses a reinforced zinc iron plate of high impact resistance relates to zinc iron plate technical field, including zinc iron plate main part, the lower extreme of zinc iron plate main part is equipped with the reinforcing rib, the outside of zinc iron plate main part is equipped with the connecting mechanism, the zinc iron plate main part is by the board base layer, the graphene reinforced zinc base composite plating layer, macromolecular polymer nanometer coating and biodegradable macromolecular coating constructs, the graphene reinforced zinc base composite plating layer is located between the board base layer and macromolecular polymer nanometer coating. The utility model adopts above -mentioned structure, and this zinc iron plate main part can greatly promote the impact strength of zinc iron plate main part through the cooperation of graphene reinforced zinc base composite plating layer, macromolecular polymer nanometer coating, biodegradable macromolecular coating and reinforcing rib.

The utility model relates to building material technical field discloses a high -strength I -type steel grating, including outer frame and flat steel, the outer wall of flat steel is connected with hot dip galvanizing layer fixedly, the outer wall of hot dip galvanizing layer is connected with electroplated zinc layer fixedly, the outer wall left and right sides of electroplated zinc layer all are connected with a plurality of horizontal reinforcing rib fixedly, the outer wall of a plurality of horizontal reinforcing rib all are connected with a plurality of longitudinal reinforcing rib fixedly, the outer wall of flat steel is set up with a plurality of weight -reducing holes, the outside of a plurality of weight -reducing holes all are connected with hole rib fixedly, the inner wall of a plurality of flat steels all are connected with a plurality of twisted square steel fixedly. In the utility model, through the synergies of the hot dip galvanizing layer and electroplated zinc layer of flat steel outer wall, the anticorrosion performance is enhanced, the horizontal reinforcing rib enhances the flat steel horizontal bending -resistance, and the longitudinal reinforcing rib forms the grid and promotes the overall strength, and the weight -reducing hole reduces the weight, and the hole rib makes up the punching intensity loss, reduces the cost while being convenient for carrying installation.

This utility model discloses a structure for an electroplated zinc-nickel alloy oil pipe. Relating to the field of automotive technology, the pipe includes a pipe body with a mounting plate fixedly attached to one end. A fixing plate is fixedly attached to the top of the end of the pipe body furthest from the mounting plate, and a vertical plate is fixedly attached to the top of the fixing plate. The structure of this electroplated zinc-nickel alloy oil pipe utilizes a cylindrical sponge placed horizontally inside the pipe body. Rotating the right-hand winding rod allows for rope retraction, which in turn moves the cylindrical sponge along the pipe's path, bringing it into contact with the curved end of the pipe. The curvature of the cylindrical sponge cleans the inner wall of the curved end of the pipe, reducing impurities and preventing turbulence and eddies. This reduces wear and corrosion on the inner wall of the curved section of the pipe.

This invention discloses a welding process for improving the lifespan of resistance spot welding electrodes on electroplated galvanized pre-phosphated steel plates, relating to the field of metal material welding technology. The process includes: applying a current of a preset waveform to the electroplated galvanized pre-phosphated steel plate for welding, the preset waveform being a current waveform with a preset slope; after welding the electroplated galvanized pre-phosphated steel plate with the preset waveform current for a first preset time, applying a first preset value current to the electroplated galvanized pre-phosphated steel plate for welding. This invention employs a three-stage welding process, adapting to the surface characteristics of the electroplated galvanized pre-phosphated steel plate, gently breaking down the high-resistance pre-phosphated film, avoiding zinc layer spatter and electrode adhesion caused by current impact, and simultaneously utilizing the post-heating stage to accelerate the solidification of the weld nugget, evaporate residual zinc vapor from the electrode, and inhibit the copper-zinc alloying reaction, thus achieving the technical effect of significantly improving electrode lifespan and ensuring stable and reliable weld quality.

The application discloses a magnesium alloy and a surface treatment process thereof, and comprises the following steps: (1) surface pretreatment: sequentially performing oil removal, dirt removal and activation on the magnesium alloy; (2) one-step zinc deposition and zinc plating: immersing the pretreated magnesium alloy into a reaction solution to perform one-step zinc deposition, and then directly performing zinc electroplating in the reaction container and the reaction solution of the one-step zinc deposition; and (3) pre-plating copper: performing copper electroplating on the surface of the magnesium alloy after the zinc electroplating. The one-step zinc deposition and zinc plating of the application replaces the secondary zinc deposition method in the traditional process, can avoid frequent tank replacement in the zinc deposition and zinc plating process, simplifies the process of the traditional magnesium alloy electroplating process, is beneficial to saving time cost and labor cost, improving economic benefits, and the obtained plating layer has excellent adhesion, and the magnesium alloy obtained after the surface treatment has excellent corrosion resistance.