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A kind of material surface coloring method

A surface coloring and coloring technology, applied in the direction of metal material coating process, coating, liquid chemical plating, etc. Large, high cost of waste liquid treatment, to achieve the effect of no risk of ecological environment hazard, mature waste liquid treatment technology, easy to operate

Active Publication Date: 2022-01-18
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, on the other hand, the above methods also have inherent defects or limitations
For example, the finishing surface usually has the original color of the base material and a single tone; color plating has special technical requirements for special equipment, plating parameters (such as vacuum degree, etc.) High; the electrolytic coloring method generally needs to build a porous bottom layer first, so there is a certain selectivity to the substrate and the process is complicated; the corrosion resistance, wear resistance and durability of the coloring layer of the chemical coloring method are not ideal, and the formula used is mostly existing Environmental protection issues, such as highly carcinogenic hexavalent chromium compounds as the main agent of coloring liquid, etc.

Method used

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  • A kind of material surface coloring method
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] To a size of 50mm × 25mm × 5mm state 6063 aluminum alloy extruded sample is sequentially performed according to the following steps:

[0047] Step a: surface finish, comprising the following main steps: ultrasonic degreasing sandpaper → → → three acid base etching polishing dip zinc → → → double zincate zinc retreat. It was sufficiently washed with water after each process. Details of respective steps as follows:

[0048] 1) sandpaper: water mill sandpaper sequentially polished from coarse to fine to sample no visible surface defects and wear scar.

[0049] 2) Ultrasonic degreasing: ethanol, ultrasonic intervention, at room temperature (30 ± 2 ℃), 15min.

[0050] 3) Alkali etching: 20g / LNa 2 CO 3 , 20g / LNa 3 PO 4 , 12g / LNaOH, 40 ℃, 2min.

[0051] 4) polishing three acid: 250ml / LH 3 PO 4 , 200ml / LH 2 SO 4 , 50ml / LHNO 3 , 80 ℃, 45sec.

[0052] 5) a zincate: 15g / LNaKC 4 Hide 4 O 6 · 4H 2 O, 1g / LNaNO 3 , 120g / LNaOH, 2g / LFeCl 3 · 6H 2 O, 20g / LZnO, at room t...

Embodiment 2

[0061]Sample materials and dimensions are the same as in Example 1. Sample preparation conditions are as follows: In addition to step four, each of the other conditions are all the same steps in Example 1. Step four conditions are changed as follows:

[0062] Coloring bath formulation and process parameters: 1.8g / L CuSO4, 1.0g / L nickel sulfate hexahydrate, 10g / L sodium hypophosphite monohydrate, 15g / L trisodium citrate dihydrate, 20g / L of boric acid , 4g / L sodium hydroxide solution, the bath was adjusted to an initial pH of 9.00, a coloring temperature 65 ℃, coloring time: 30,45,60,75,90min.

[0063] The results obtained colorful coloring effect. The colored surface of the color sample corresponding to the time relationship shown in Table 1 below.

[0064] Table 1: influence of time on the colored coloring effect

[0065] Coloring time, min 30 45 60 75 90 Coloring effect Pink Orange yellow Grass green Light green Yellow-green

Embodiment 3

[0067] Sample materials and dimensions are the same as in Example 1. Sample preparation conditions are as follows: In addition to step four, each of the other conditions are all the same steps in Example 1. Step four conditions are changed as follows:

[0068] Coloring bath formulation and process parameters: 2.1g / L CuSO4, 1.0g / L nickel sulfate hexahydrate, 10g / L sodium hypophosphite monohydrate, 15g / L trisodium citrate dihydrate, 20g / L of boric acid , 4g / L sodium hydroxide solution, the bath was adjusted to an initial pH of 9.00, a coloring temperature 65 ℃, coloring time: 15,30,45,60,75,90min.

[0069] The results obtained colorful coloring effect. The colored surface of the color sample corresponding to the time relationship shown in Table 2 below.

[0070] Table 2: influence of time on the colored coloring effect

[0071]

[0072]

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Abstract

The invention discloses a material surface coloring method. The method mainly includes five processing steps of surface finishing, electroless plating priming, activation, electroless plating coloring and color retention. The invention cleverly applies the composite electroless plating technology to the decorative surface treatment of materials, and overcomes the application defects of the traditional coloring technology such as thin color layer, poor corrosion resistance and wear resistance, easy fading, and single color tone of the traditional electroless plating technology coating. Utilizing the method provided by the invention, not only can the rich colors be easily obtained by adjusting the processing time, or controlling the copper sulfate content level in the colored plating solution, which can significantly improve the aesthetic feeling of the material, but also the prepared decorative coating has excellent corrosion resistance and wear resistance. It has the advantages of high performance and durability, and is firmly combined with the substrate.

Description

Technical field [0001] The present invention belongs to the field of materials processing technology, particularly relates to a method of coloring a surface of a material. Background technique [0002] Surface modification technology has always been in the convoy escort for the material, value-added luster to play a significant role. Among them, the decorative surface treatment as one of the important aspects of product manufacturing indispensable, is to improve product quality and enhance the important technical means for consumer appeal. With the development of science and technology and the social economy, with the release of individual needs, the market demand for decorative surface materials have become increasingly demanding, developing new decorative surface treatment technologies gain more and more attention. [0003] So far, the decorative surface treatment method has been successfully developed and manufacturing of all ages, including the following three categories: [...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C18/48C23C18/18C23C18/16
CPCC23C18/48C23C18/1803C23C18/1651
Inventor 张永君许悦
Owner SOUTH CHINA UNIV OF TECH