CN101311311A - Technological process for dying red antique bronze color on surface of brass products - Google Patents

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

A kind of processing method of dying red antique bronze color on surface of brass products

Technical field:

The present invention relates to a kind of brass (copper zinc alloy) device surface be incarnadined copper-colored processing method, belong to metallic surface finish, plating decorations technology field.

Background technology:

Some bronze, brass or copper ware is needs modelled after an antique or attractive in appearance, need be bronze with surface treatment, original as do material with fine copper and only need to add black processing do oxidation slightly and just can, if can save great amount of cost than with fine copper but do material with brass, brass surfaces is treated to bronze and often wants pre-copper facing now, remaking dyeing and handling, this technology is called " doing old " at the archaizeding handicraft manufacture field, makes brass ware show color and luster and texture as the red bronze at short notice.

Forefathers once had patent (CN1089904A) to introduce a kind of zinc alloy to be coloured to copper-colored method, system with zinc-copper-rare earth alloy or zinc-aluminium-rare-earth alloy through at the bottom of preplating neutral nickel-pyrophosphate copper plating-carry out bronze-colored processing in acid plating bright copper-Potassium Persulphate basic solution, this method treatment scheme complexity, the technology of dyeing time length and copper facing, nickel is difficult for grasping.Also have the investigator to propose for the dyeing of brass teeth zipper that old technology is done on various surfaces in addition but in various degree exist complex process or agents useful for same severe toxicity or the high problem of dyeing cost.

Summary of the invention:

The objective of the invention is at above-mentioned these problems, propose a kind of improvedly, flow process is short, and technology is simple, and brass device padding method with low cost.

The present invention is a kind of processing method of dying red antique bronze color on surface of brass products, it is characterized in that having following technological process and step:

A, the required several solns of preparation:

Dezincify treatment solution A: preparation mixed aqueous solution, wherein CuSO ₄5H ₂The O concentration expressed in percentage by weight is 10-20%; The NaCl weight percent concentration is for being 4-8%; The hydrochloric acid concentration expressed in percentage by volume is 1-5%, perhaps, and CuCl wherein ₂Weight percent concentration is 5-10%; The hydrochloric acid concentration of volume percent is 1-5%.

Etching processing liquid B: concentration of volume percent is 5% aqueous nitric acid or aqueous sulfuric acid.

Bronze staining fluid C: the preparation weight percent concentration is the KMnO of 5-10% ₄Or K ₂S ₂O ₈Or NH ₄S ₂O ₈The aqueous solution, perhaps adopt above-mentioned three kinds wantonly two kinds to form and mix and the aqueous solution, the proportioning of wherein appointing the two is 1: 1; Standby;

B, earlier with brass device heat alkali liquid washing by soaking routinely, remove surface and oil contaminant, then washing and drying;

C, will remove the clean brass device of smeary and put into 60-90 degree centigrade dezincify treatment solution A, the treatment time is 5-10 minute, treats that uniform fine copper redness appears in device, takes out washing;

D, above-mentioned brass device is placed treatment solution B normal temperature to handle 2-15 minute washing down then.

E, above-mentioned brass device was dropped among the bronze staining fluid C dyeing 5-15 minute then, with after washing, drying.

F, be stained with the polishing of a small amount of paraffin with the buffing machine after, it is even promptly to obtain surface color, chromatograph is in conjunction with the firm bronze device of difficult drop-off.

The inventive method technology is simple, grasps operation easily, and flow process is short, and with low cost, is a kind of practical metallic surface plating decorations processing method.

Description of drawings:

Fig. 1 is the slide fastener appearance luster aspect graph before the dyeing in the embodiment of the invention.

Fig. 2 incarnadines bronze-colored 5 minutes slide fastener appearance luster aspect graph in the embodiment of the invention.

Fig. 3 incarnadines bronze-colored 15 minutes slide fastener appearance luster aspect graph in the embodiment of the invention.

Embodiment:

After now specific embodiments of the invention being described in.

Embodiment 1

Processing step in the present embodiment is as follows:

1, the required several solns of preparation:

Dezincify treatment solution (A): with 15gCuSO ₄5H ₂O, 6gNaCl, 5ml hydrochloric acid are dissolved in the 150ml tap water, perhaps with 8gCuCl ₂, 5ml hydrochloric acid is dissolved in the 150ml tap water, forms mixed aqueous solution.

Etching processing liquid (B): concentrated nitric acid or vitriol oil 5ml are dissolved in the 100ml tap water, form acid etching processing liquid;

Bronze staining fluid (C): with 16gKMnO ₄Or K ₂S ₂O ₈Or NH ₄S ₂O ₈Be dissolved in the 200ml water, as staining fluid, standby.

2, earlier with brass (copper zinc alloy) slide fastener clip 10cm, place 70 degrees centigrade 5% sodium hydroxide solution to soak 10 minutes, remove surface and oil contaminant, washing then, drying;

3, the brass teeth zipper that will remove the greasy dirt cleaning is put into 80 degrees centigrade dezincify treatment solution A; Can adopt above-mentioned CuSO ₄, the mixing solutions formed of NaCl and hydrochloric acid, perhaps adopt CuCl ₂With the mixing solutions that hydrochloric acid is formed, carry out dezincify and handle; Treatment time is 5 minutes, treats that uniform fine copper redness appears in device, takes out washing;

4, then above-mentioned brass teeth zipper is placed etching processing liquid B, normal temperature was handled 2 minutes down, washing.

5, then above-mentioned slide fastener is dropped in 80 degrees centigrade the bronze staining fluid (C), dyeed 5 minutes, with after washing, drying; Staining fluid C adopts KMnO ₄Perhaps K ₂S ₂O ₈Perhaps NH ₄S ₂O ₈, its final effect is close, does not have very big-difference;

6, be stained with the polishing of a small amount of paraffin with the buffing machine after, it is even just to obtain surface color, chromatograph is in conjunction with the firm brass teeth zipper of the bronze tooth of difficult drop-off.

Embodiment 2

The processing step of present embodiment and the foregoing description 1 are identical.Different is: bronze staining fluid C is for adopting 8gKMnO ₄And 8gK ₂S ₂O ₈Be dissolved in the mixed solution of forming in the 200ml water altogether; Or employing 8gKMnO ₄And 8gNH ₄S ₂O ₈Be dissolved in the mixed solution of forming in the 200ml water altogether.In addition, the slide fastener dyeing time in the present embodiment is 15 minutes.It is even finally to obtain surface color, and chromatograph is in conjunction with the brass teeth zipper of firm bronze tooth.

The dyeing color and luster of resulting dyeing product brass teeth zipper and exterior appearance are respectively referring to Fig. 1, Fig. 2, Fig. 3 in the foregoing description.

By among the photo figure as can be seen, through different dyeing time, long its color and luster of slide fastener surface of dyeing time is dim more; For the control of color and luster, dyeing time is an important factor.

The inventive method can satisfy the finish of brass teeth zipper and brass artwork, the requirement of plating decorations.

Claims (1)

1. the processing method of a dying red antique bronze color on surface of brass products is characterized in that having following technological process and step:

A, the required several solns of preparation:

Dezincify treatment solution A: preparation mixed aqueous solution, wherein CuSO ₄5H ₂The O concentration expressed in percentage by weight is 10-20%; The NaCl weight percent concentration is for being 4-8%; The hydrochloric acid concentration expressed in percentage by volume is 1-5%, perhaps, and CuCl wherein ₂Weight percent concentration is 5-10%; The hydrochloric acid concentration of volume percent is 1-5%;

Etching processing liquid B: concentration of volume percent is 5% aqueous nitric acid or aqueous sulfuric acid;

Bronze staining fluid C: the preparation weight percent concentration is the KMnO of 5-10% ₄Or K ₂S ₂O ₈Or NH ₄S ₂O ₈The aqueous solution, perhaps adopt above-mentioned three kinds wantonly two kinds to form and mix and the aqueous solution, wherein appoint the proportioning of the two to be 1: 1, standby;

B, earlier with brass device heat alkali liquid washing by soaking routinely, remove surface and oil contaminant, then washing and drying;

C, will remove the clean brass device of smeary and put into 60-90 degree centigrade dezincify treatment solution A, the treatment time is 5-10 minute, treats that uniform fine copper redness appears in device, takes out washing;

D, above-mentioned brass device is placed under the etching processing liquid B normal temperature and to handle washing 2-15 minute then;

E, above-mentioned brass device was dropped among the bronze staining fluid C dyeing 5-15 minute then, with after washing, drying;

F, be stained with the polishing of a small amount of paraffin with the buffing machine after, it is even promptly to obtain surface color, chromatograph is in conjunction with the firm bronze device of difficult drop-off.

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