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Coloring method for red spot copper

A spot copper and red technology, applied in the direction of metal material coating process, can solve the problems of small production scale, scarcity of raw materials, complex processing, etc., and achieve the effect of low production cost, simple operation and abundant raw materials

Inactive Publication Date: 2014-11-05
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the scarcity of raw materials, complex processing, high cost and small production scale, "raw spots" can only be used to make simple and small tripods, furnaces, bottles, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Embodiment 1: The coloring method of red spotted copper of this embodiment:

[0016] (1) Pretreatment for coloring: Grind the copper-zinc alloy castings with a copper content of 93wt% with sandpaper to ensure that the surface of the castings is smooth and free of pits, soak in hydrochloric acid with a concentration of 10mol / L to remove the surface oxide layer, and then clean the castings clean;

[0017] (2) Spotting treatment: Put the cleaned castings into a spotting solution containing 8.1wt% ferric chloride, 9.6wt% hydrochloric acid, and 0.8wt% potassium chloride for 5 minutes, and there will be irregularities on the castings. Then clean the spotted castings to ensure that there is no spotting solution on the surface of the castings;

[0018] (3) Coloring process: Put the castings obtained in step (2) into copper sulfate pentahydrate: sodium chloride: sodium pyrophosphate: distilled water: 25g: 10g: 28g: 1L of coloring solution and soak 8 After hours, the castings were tak...

Embodiment 2

[0019] Embodiment 2: The coloring method of red spotted copper of this embodiment:

[0020] (1) Pretreatment for coloring: Grind the copper-zinc alloy castings with a copper content of 96wt% with sandpaper to ensure that the surface of the castings is smooth and free of pits, soak them in 11mol / L hydrochloric acid to remove the surface oxide layer, and then clean the castings clean;

[0021] (2) Spotting treatment: Put the cleaned castings in a spotting solution containing 7wt% ferric chloride, 10wt% hydrochloric acid, and 0.5wt% potassium chloride for 8 minutes, and there will be different sizes on the castings. Spots, and then clean the spotted castings to ensure that there is no spotting solution on the surface of the castings;

[0022] (3) Coloring process: Put the castings obtained in step (2) into copper sulfate pentahydrate: sodium chloride: sodium pyrophosphate: distilled water: 30g: 9g: 25g: 1L of coloring solution and soak 9 After hours, the castings were taken out and ri...

Embodiment 3

[0023] Embodiment 3: The coloring method of red spotted copper of this embodiment:

[0024] (1) Pretreatment for coloring: Use sandpaper to polish a copper-zinc alloy casting with a copper content of 97wt% to ensure that the surface of the casting is smooth and free of pits. Soak it in hydrochloric acid with a concentration of 12mol / L to remove the surface oxide layer, and then clean the casting clean;

[0025] (2) Spotting treatment: Put the cleaned castings in a spotting solution containing 9wt% ferric chloride, 8wt% hydrochloric acid, and 1wt% potassium chloride for 10 minutes, and spots of different sizes will appear on the castings , And then clean the spotted castings to ensure that there is no spotting solution on the surface of the castings;

[0026] (3) Coloring process: Put the castings obtained in step (2) into copper sulfate pentahydrate: sodium chloride: sodium pyrophosphate: distilled water: 35g: 11g: 35g: 1L of coloring solution and soak 10 After hours, the castings ...

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Abstract

The present invention relates to a coloring method for a red spot copper, and belongs to the field of metal material surface treatment and handicraft product production. The coloring method comprises: selecting a copper-zinc alloy casting having a copper content of 97-93%, carrying out a coloring pre-treatment, placing the casting in a spot emergence solution to carry out erosion for 5-10 minutes to emerge spots, and placing the spot emerging casting in a coloring solution to soak for 8-10 hours to appear red, wherein a specific time can be controlled according to color requirements of the specific handicraft product, and the longer the soaking time in the solution is, the more significant the red coloring effect is. The preparation method has the following advantages that: operation is simple; production cost is low; a production period is short; no product shape limitation exists; the product has a beautiful color; and the like.

Description

Technical field [0001] The invention relates to a coloring method of red spotted copper, in particular to a coloring formula and a process thereof, and belongs to the field of surface treatment of metal materials and handicraft production. Background technique [0002] Born copper, as Yunnan's unique brass, is made from high-grade copper-based alloy materials through modeling design, casting molding, precision polishing and other complicated subsequent process treatments to obtain markings with different shapes and colors. Spotted copper is precious in spotting, and the spotting looming in the copper substrate makes the spotted copper crafts have the wonderful color of red and golden, which is a special craft unique to China. Its maroon surface, showing markings, has a feeling of thick, simple and elegant, it can be called the crown of metal craftsmanship. The surface shows a variety of irregular magnificent patterns and golden and red interlaced colors, which are unique folk tr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C22/07C23C22/78
Inventor 朱心昆龙燕龚玉兰任世影吴小香
Owner KUNMING UNIV OF SCI & TECH
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