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

Abstract

The invention relates to a technique of painting black paint 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 black paint 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 black paint bronze staining solution is K2S 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 antique reproduction brass artwork and has good effect.

Description

A kind of process method of dyeing the surface of brass parts with black paint and bronze color Technical field: The invention relates to a technology for dyeing the surface of a brass (copper-zinc alloy) device into a black lacquer bronze color, and belongs to the field of metal surface finishing and plating processing technology. Background technique: Some utensils made of brass, such as some brass zippers and handicrafts, before they go on the market, in order to improve the grade of the product and the needs of antiques, most of them need to be dyed. The dyed colors are mainly bronze, imitation cupronickel Color, light bronze, black lacquer bronze, etc., are called "old" in the field of antique handicraft processing, so that brass products show a bronze-like color and texture in a short period of time. 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 ...

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 in acidic bright copper-potassium persulfate alkaline solution, the process of this method is complicated, the dyeing time is long and the copper plating process is not easy to master

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

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