CN112899750A

CN112899750A - Metal coloring treatment process

Info

Publication number: CN112899750A
Application number: CN202110049387.XA
Authority: CN
Inventors: 邓宇
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-01-14
Filing date: 2021-01-14
Publication date: 2021-06-04
Also published as: WO2022151652A1

Abstract

The technical purpose of the invention is to provide a coloring treatment process of a colored anode metal, which can color the surface of the metal in multiple colors and integrate the pigment and the metal through physical coloring and chemical complexing. The metal coloring treatment process comprises the following steps: deoiling the surface of the aluminum alloy metal; alkalifying the surface of the aluminum alloy metal and neutralizing the alkalified substance; chemically polishing the surface of the aluminum alloy metal and neutralizing the chemically polished compound; carrying out anodic oxidation treatment on the metal surface, neutralizing the anodic oxidation chemicals, and forming fine holes on the aluminum alloy metal surface; printing a color process pattern on the metal surface by adopting the complexing ion nano weak solvent ink through a printer, wherein the color ink enters the tiny holes; and air-drying the surface of the aluminum alloy with the printed colorful patterns. The color anode of the invention performs special hole expanding technology on the anode film layer and special raw film anode parameters to consolidate the adhesion, compactness and wear resistance of the toner.

Description

Metal coloring treatment process

Technical Field

The invention relates to a metal processing technology, in particular to a coloring technology applied to metal processing.

Background

In the prior art, the conventional anodic oxidation coloring has the limitation of single color, the conventional anodic oxidation can only be used for coloring single color, such as red, orange, yellow, green, cyan, blue, , black, gray and the like, only one color on one oxygen-positive workpiece can be reflected in vision, the multi-color requirements of products cannot be met, the coloring is not firm, and the process problems of easy decolorization and color change occur after the workpiece is used for a period of time; in view of the above, the technical defects of single color and easy aging and discoloration of the anodic oxidation coloring in the art become technical problems to be solved by those skilled in the art.

Disclosure of Invention

The invention aims to overcome the technical problems of difficult fixation and single coloring of anodic oxidation coloring in metal surface treatment in the prior art, and provides a colorizing treatment process for colorizing a metal surface by a colorful anodic metal, wherein the colorful anodic metal is formed by physically coloring and chemically complexing a pigment and the metal.

In order to achieve the technical purpose, the technical scheme of the invention is as follows:

the metal coloring treatment process is characterized by comprising the following steps:

a. deoiling the surface of the aluminum alloy metal;

b. alkalifying the surface of the aluminum alloy metal and neutralizing the alkalified substance;

c. chemically polishing the surface of the aluminum alloy metal and neutralizing the chemically polished compound;

d. carrying out anodic oxidation treatment on the metal surface, neutralizing the anodic oxidation chemicals, and forming fine holes on the aluminum alloy metal surface;

e. printing a color process pattern on the metal surface by adopting the complexing ion nano weak solvent ink through a printer, wherein the color ink enters the tiny holes;

f. and air-drying the surface of the aluminum alloy with the printed colorful patterns.

Furthermore, in the step a, a titanium hanger with better alkali resistance, acid resistance and electric conductivity is adopted to place the aluminum alloy workpiece.

Further, in the step a, a 15% -30% nitric acid-containing aqueous solution is adopted for cleaning, the nitric acid aqueous solution is heated to 60-70 ℃, the workpiece is soaked for 3-5 minutes, and oil stains and wax stains on the surface of the workpiece are removed.

Further, the fine pores have a diameter of 0.01 to 0.03. mu.m.

Further, the color ink contains dye particles with a diameter of 0.0015 to 0.003 μm.

The metal surface is anodized for more than 45 minutes.

200g/L of sodium hydroxide and 50g/L of sodium nitrate

The beneficial technical effects of the invention are as follows: the dye is a dye for complexing metal ions, physically adsorbed by the aluminium hydroxide of the porous layer, and chemically complexed into a chromogenic metal salt; become part of the aluminum alloy. The color anode is subjected to special reaming technology on an anode film layer and special raw film anode parameters to consolidate the adhesiveness, compactness and wear resistance of toner, post-treatment coloring is carried out by using a special printer to add weak solvent ink, and hole sealing treatment is carried out after coloring. And baking the hole after hole sealing by using a baking line.

Drawings

FIG. 1 is a process flow diagram of one embodiment of the present invention.

Detailed Description

The following detailed description will explain specific embodiments of the present invention by referring to specific examples, but not limiting the claims.

According to the invention, a titanium hanger is used for fixing a workpiece, the titanium hanger has good alkali resistance, acid resistance and conductivity, a nitric acid solution prepared by mixing 100L of water with 20L of nitric acid is used, the temperature is increased to 60-70 ℃, the workpiece is soaked for 3-5 minutes, oil stains and wax stains on the surface of the workpiece are removed, and the surface of an aluminum alloy metal is deoiled.

Alkalifying the surface of the aluminum alloy metal and neutralizing the alkalified substance; the alkali washing solution is prepared as follows: dissolving 200g of sodium hydroxide and 50g of sodium nitrate in 1 liter of water; heating to 80-90 ℃, removing a natural oxide layer on the surface of the product, and adjusting the brightness of the surface of the product; or 380g of sodium hydroxide is dissolved in 1 liter of water, the temperature is raised to 80-90 ℃, a natural oxide layer on the surface of the product is removed, and the brightness of the surface of the product is adjusted; the solution for neutralizing the aluminum alloy surface chemicals after alkali washing is prepared as follows: 1. 30 percent of nitric acid, 2 percent of chromic anhydride and 3 percent of clean water; neutralizing alkali washing at normal temperature, and removing compounds on the surface after alkali washing.

Chemically polishing the surface of the aluminum alloy metal and neutralizing the chemically polished compound; the chemical polishing solution is prepared by the following steps: 1. the method comprises the following steps of (1) soaking a product at 90-110 ℃ with 16 wt% of sulfuric acid (content 98%), 80 wt% of phosphoric acid (content 85%) and 4 wt% of nitric acid (content 98%), and adjusting the brightness of the surface of the product; the solution of the compound that neutralizes the chemical polishing is formulated as: 1. 30 percent of nitric acid, 2 percent of chromic anhydride and 3 percent of clean water; neutralizing the polished compound at normal temperature.

Anodizing the metal surface, neutralizing the anodized chemical, anodizing the aluminum alloy metal surface for more than 45 minutes, and forming fine holes on the aluminum alloy metal surface; preparing a solution for anodic oxidation: each liter of water contains 150-200 g of sulfuric acid and 10-15 g of alumina solution; the temperature of the solution is controlled at 18-20 ℃, and anodic oxidation treatment is carried out by adopting a refrigerator, a rectifier, a lead plate, a copper plate and PP groove fixing equipment. About 77 hundred million nanometer-scale holes are formed on the anode of each square centimeter of the aluminium surface, and the diameter of each small hole is 0.01-0.03 mu m. Printed and dyed to form the only dyeable metal. The method is characterized in that 30% by weight of nitric acid, 5% by weight of chromic anhydride and 65% of clear water are used for preparing a neutralization oxidation acid solution, and micropore expansion is carried out at normal temperature.

The above procedures adopt ultrasonic equipment for ultrasonic treatment, and can obtain better cleaning and dye attaching effects.

The printer is used to print color pattern on the metal surface with color ink containing dye particle of 0.0015-0.003 micron diameter. The color ink enters the tiny holes; and air-drying the surface of the aluminum alloy with the printed colorful patterns. The ambient temperature was controlled below 26 ℃ and the water was cut with an air knife for 30 minutes.

In the invention, the dye is a dye which complexes metal ions, physically adsorbs aluminium hydroxide through the porous layer, and then chemically complexes into a chromogenic metal salt which becomes a part of the aluminium alloy; and the color anode is subjected to special reaming technology on the anode film layer and special raw film anode parameters to consolidate the adhesiveness, compactness and wear resistance of toner, post-treatment coloring is carried out by using a special printer to add weak solvent ink, and hole sealing treatment is carried out after coloring. And baking the hole after hole sealing by using a baking line.

Claims

1. The metal coloring treatment process is characterized by comprising the following steps:

deoiling the surface of the aluminum alloy metal;

alkalifying the surface of the aluminum alloy metal and neutralizing the alkalified substance;

chemically polishing the surface of the aluminum alloy metal and neutralizing the chemically polished compound;

carrying out anodic oxidation treatment on the metal surface, neutralizing the anodic oxidation chemicals, and forming fine holes on the aluminum alloy metal surface;

printing a color process pattern on the metal surface by adopting the complexing ion nano weak solvent ink through a printer, wherein the color ink enters the tiny holes;

and air-drying the surface of the aluminum alloy with the printed colorful patterns.

2. A metal coloring process according to claim 1, wherein: and in the step a, a titanium material hanging rack with better alkali resistance, acid resistance and electric conductivity is adopted to place the aluminum alloy workpiece.

3. A metal coloring process according to claim 1, wherein: in the step a, a 15% -30% nitric acid-containing aqueous solution is adopted for cleaning, the nitric acid aqueous solution is heated to 60-70 ℃, the workpiece is soaked for 3-5 minutes, and oil stains and wax stains on the surface of the workpiece are removed.

4. A metal coloring process according to claim 1, wherein: the diameter of the fine holes is 0.01-0.03 mu m.

5. A metal coloring process according to claim 1, wherein: the color ink contains dye particles with the diameter of 0.0015-0.003 mu m.

6. A metal coloring process according to claim 1, wherein: the metal surface is anodized for more than 45 minutes.