Method for whitening surface of metal material

A metal material, white technology, applied in the field of making the surface of metal materials white and coloring the surface of metal materials, can solve the problems of rare metal shells, unable to meet the texture and appearance, and loss of metal texture.

Inactive Publication Date: 2013-09-18
可成科技(苏州)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The metal casings of 3C products sold on the market can already be seen in rich colors, such as brown, green, black, silver gray, etc., and even have multi-level rainbow-like colors. However, the white 3C products that are highly accepted by the market The metal casing of the product is extremely rare
At present, the industry uses white

Method used

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  • Method for whitening surface of metal material
  • Method for whitening surface of metal material
  • Method for whitening surface of metal material

Examples

Experimental program
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Effect test

Embodiment

[0043] Prepare an aluminum alloy material, and subject the aluminum alloy material to pretreatment S2, which includes degreasing S21, alkali washing S22, chemical polishing S23, pickling S24, etc.; In the degreasing agent solution, after degreasing S21 at a temperature of 50°C, the metal material was washed twice with pure water at room temperature. Next, the aluminum alloy material was placed in a 200 g / L sodium hydroxide aqueous solution, and alkali washing S22 was performed at room temperature, and then the metal material was washed twice with pure water at room temperature. Here, the aluminum alloy material is placed in a phosphoric acid aqueous solution, and the chemical polishing S23 is performed at a temperature of 85° C. to 93° C., and then the metal material is washed three times with pure water at room temperature. Finally, the aluminum alloy material after chemical polishing S23 is placed in 20 milliliters / liter (mL / L) of nitric acid aqueous solution, pickling S24 i...

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Abstract

The invention relates to a method for whitening the surface of a metal material. The method comprises the step of subjecting a metal material having undergone anodization to cathode shading, wherein the metal material is placed in an electrolyte to allow the surface of the metal material to become white. The surface of the metal material becomes white due to specific components included in the electrolyte used in the step of cathode shading, so the appearance of the metal material has a high degree of market acceptability. The invention has the following advantage: a white layer is formed on the surface of the metal material through cathode shading by using the electrolyte with specific composition, so the appearance of the metal material accords with demands of consumers for the appearance of 3C products on the market.

Description

technical field [0001] The invention relates to a method for coloring the surface of a metal material, in particular to a method for making the surface of a metal material white, and belongs to the field of metal surface treatment. Background technique [0002] The dyeing method on the surface of metal materials often utilizes anodizing and dyeing techniques. The anodizing process uses electrochemical principles to generate a porous oxide layer with a certain thickness on the surface of a metal material. Then carry out dyeing treatment, the described technology has many advantages, such as: effective anti-oxidation, easy to clean, not easy to scratch, corrosion resistance, smooth surface and so on. Therefore, anodizing is widely used in decorative purposes and can beautify the appearance, obtain colorful decorative effects, and increase the added value of products. The metal casings of 3C products sold on the market can already be seen in rich colors, such as brown, green, ...

Claims

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Application Information

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IPC IPC(8): C25D11/22C25D11/02
Inventor 赖锋儒胡少刚胡纯嘉
Owner 可成科技(苏州)有限公司
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