Method for improving electroplating process

Abstract

The invention discloses a method for improving an electroplating process, which comprises a common electroplating process, and after common electroplating is implemented, a plated part is subjected to oil-impregnated treatment. The method also comprises the following steps: 1, reaction between waste zinc and zinc sulfate: putting waste metal zinc into a reaction tank with an overflow port, and adding a dilute sulphuric acid to react; 2, impurities precipitation: enabling a zinc sulfate solution generated in the reaction to flow to a precipitation tank through the overflow port of the reaction tank so as to precipitate impurities; 3, filtering: filtering the zinc sulfate solution subjected to precipitation by a filtering machine; and 4, electroplating: feeding the filtered zinc sulfate solution into a galvanizing pot to electroplate steel plates. According to the invention, because in the electroplating process, waste metal zinc and a sulfuric acid are reacted so as to generate an electroplating liquid in a continuous galvanizing process of steel plates, so that 15% of metal zinc is saved, therefore, the method has a great economic benefit; and remaining waste zinc which can not be re-melted in the hot-dip coating process of steel plates is used as zinc for electroplating, therefore, the process has an environment protection significance.

Description

technical field [0001] The invention relates to an anti-oxidation method for metal surfaces, in particular to a process improvement method for hard zinc electroplating parts, belonging to the technical field of industrial electroplating. Background technique [0002] For metals that are easy to oxidize and whose surface is corroded, we use electroplating technology to coat the workpiece with a layer of material that is not easy to oxidize, so as to achieve a beautiful and smooth effect. However, such materials are often costly, and there is always a thin layer during electroplating. Due to improper surface treatment of the substrate, the coating will fall off or be damaged, resulting in damage or wear of the coating. At this time, the plating will show local oxidation. Make the plated parts extremely unsightly. Some technicians have developed a hard zinc plating process to perform hard zinc plating on some long-term worn workpieces, which can slightly improve the corrosion ...

AI Technical Summary

Problems solved by technology

[0004] However, in order to maintain the state of the plated parts for a long time, it is necessary to add other alloy coatings. This kind of processing has many pre-treatment processes, complex processes, large investment in equipment, low yield rate, and extremely high cost.