Anode device for preparing Ni-SiC composite coating on inner wall of hollow workpiece

Abstract

An anode device for preparing a Ni-SiC composite coating on the inner wall of a hollow workpiece comprises a nickel anode top cover, an inner layer nickel anode tube and an outer layer nickel anode tube. The inner layer nickel anode tube is located in the outer layer nickel anode tube, and an anode tube body of an interlayer structure is formed. Positions of inner layer anode slots located on thewall of the inner layer nickel anode tube and positions of outer layer anode slots located on the wall of the outer layer nickel anode tube are staggered. The nickel anode top cover is fixed to the end face of the upper end of the anode tube body, and thus the inner layer nickel anode tube and the outer layer nickel anode tube are fixedly connected. The Ni-SiC composite coating on the inner wall of the hollow workpiece effectively overcomes coating quality defects caused by anode reasons in the prior art, improves the macro / micro evenness of the Ni-SiC composite coating on the inner surface ofthe hollow workpiece, and can also be used for electroplating or composite electroplating of other single metal.

Description

technical field [0001] The invention relates to the field of material processing, in particular to an anode device for preparing a Ni-SiC composite coating on the inner wall of a hollow part. Background technique [0002] Because hard chrome plating technology can produce coatings with good hardness, wear resistance, corrosion resistance and high temperature resistance, it is widely used in engine cylinder strengthening, and is even one of the preferred strengthening processes. However, chromium plating has problems such as low current efficiency, serious waste of resources, and poor uniformity of coating quality. At the same time, hexavalent chromium plating technology is a serious source of electroplating pollution and has a serious risk of carcinogenesis. Countries have issued relevant laws and regulations to limit or ban the use of electrochrome plating technology. Among them, composite electroplating is one of the research hotspots to replace chromium plating technolog...

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the uneven quality of the coating caused by the anode in the prior art, especially the defects of uneven distribution of SiC particles and macroscopic incompleteness of the coating, as well as the shortcoming of sudden circuit failure during the plating process, the present invention proposes An anode device for preparing Ni-SiC composite coating on the inner wall of hollow parts

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