Technological process for dying red antique bronze color on surface of brass products

Abstract

The invention relates to a technique of painting red bronze on the surface of a brass (copper-zinc alloy) device, which belongs to the technique field of processing technology of metal surface finish and plating. The method of the invention is characterized in that a copper device with red bronze surface can be got by treating the brass device with dezincification solution, etching solution and staining solution and then by buffing and waxing. The red bronze staining solution is KMnO4 solution or K2S2SO8 solution or NH4S2O8 solution with certain concentration. The method of the invention is a brass device staining method which is simple in technique, easy in operation and low in cost. The method has the advantages that the dyeing quality is uniform and good and the color layer is steady and not easy to fall off. More particularly, the method is suitable for making old processing and antique reproduction of brass artwork and has good appearance effect.

Description

Technical field: The invention relates to a process method for dyeing the surface of a brass (copper-zinc alloy) device with a reddish bronze color, and belongs to the technical field of metal surface finishing and plating. Background technique: Some copper wares need to be treated for antique or aesthetic needs, and the surface needs to be treated as red bronze. Originally, if pure copper is used as material, it only needs a little oxidation and blackening treatment, but if brass is used as material, it will save a lot of money than pure copper Cost, now the surface treatment of brass is red bronze, it is often pre-plated copper, and then dyed. color and texture. A previous patent (CN1089904A) introduced a method of dyeing zinc alloy into a bronze color, which is to pre-plate the neutral nickel-pyrophosphate copper plating base with zinc-copper-rare earth alloy or zinc-aluminum-rare earth alloy- Bronze treatment is carried out in acidic bright copper plating-potassium pe...

AI Technical Summary

Problems solved by technology

A previous patent (CN1089904A) introduced a method of dyeing zinc alloy into a bronze color, which is to pre-plate the neutral nickel-pyrophosphate copper plating base with zinc-copper-rare earth alloy or zinc-aluminum-rare earth alloy- Bronze treatment is carried out in acidic bright copper-potassium persulfate alkaline solution. The process of this method is complicated, the dyeing time is long, and the process of copper and nickel plating is not easy to master

In addition, some researchers have proposed various surface aging processes for the dyeing of brass zippers, but to varying degrees there are problems such as complicated processes, highly toxic reagents used, or high dyeing costs.

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