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Zinc-impregnating layer anodic oxidation method colouring process and its treatment solution formula

An anodizing method and a technology for treating solutions, which are applied in the coating process of metal materials, coating, and plating of superimposed layers, etc., can solve problems such as environmental pollution, achieve no environmental pollution, solve environmental pollution problems, and have good stability. Effect

Inactive Publication Date: 2005-06-22
SHANGHAI AIERSI LIGHT ALLOY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method has simple process, simple and clear components of the solution, and low cost, and also solves the problem of environmental pollution caused by colorization with chromium compounds

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] First add 3 / 4 of distilled water into the 5L tank, add 150g potassium hydroxide, 150g potassium oxalate and 200g aniline in sequence, then add water to the predetermined volume, and after the treatment solution is left for 24 hours, remove the AZ91 magnesium alloy parts as the anode. Oil and water washing, pickling, water washing, alkali washing, activation, water washing, zinc immersion, water washing, and then at 10°C, with AZ91 magnesium alloy zinc dipped parts as anode and stainless steel as cathode, pass through the treatment solution with The frequency is 500Hz, the on-off ratio is 5%, and the current density is 0.5A / dm 2 After anodizing for 1 minute, cut off the power, rinse with tap water, and dry with hot air. A dense iridescent film layer can be obtained.

Embodiment 2

[0023] First add 3 / 4 of distilled water to the 10L tank, then add 350g potassium hydroxide, 350g potassium oxalate and 300g aniline in turn, then add water to the predetermined volume, after standing still for 24 hours, degrease and clean the LY12 aluminum alloy as the anode Rinse, pickle, rinse with water, rinse with alkali, activate, rinse with water, dip in zinc, rinse with water, then use LY12 aluminum alloy zinc dipped as anode and stainless steel as cathode at 15°C, pass through the treatment solution with a frequency of 1500Hz, The on-off ratio is 10%, and the current density is 0.3A / dm 2 After 2 minutes of anodizing, cut off the power, rinse with tap water, and dry with hot air. A dense iridescent film layer can be obtained.

Embodiment 3

[0025] Add 3 / 4 distilled water to the 5L tank, add 125g potassium hydroxide, 200g potassium oxalate and 175g aniline in sequence, then add water to the predetermined volume, after standing still for 24 hours, degrease and clean the AM60 magnesium alloy as the anode Washing, pickling, water washing, alkali washing, activation, water washing, zinc dipping, water washing, and then at 40°C, use AM60 magnesium alloy zinc dipped parts as anode and stainless steel as cathode, pass through the treatment solution with a frequency of 800Hz, On-off ratio 5%, current density 1A / dm 2 Current treatment, after anodizing for 0.5 minutes, cut off the power, rinse with tap water, and dry with hot air. A dense iridescent film layer can be obtained.

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PUM

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Abstract

The invention relates to a process for anodic oxidation colorization of a magnesium alloy or an aluminum alloy surface and a formula of an electroplating solution thereof, belonging to the technical field of electroplating. The process is as follows: the pulse anodic oxidation method and the treatment solution composed of potassium hydroxide, aniline and potassium oxalate are used to colorize the zinc-coated layer on the surface of the magnesium alloy or aluminum alloy. First, the magnesium alloy or aluminum alloy substrate as the anode is pretreated. That is, degreasing, pickling, alkali washing, activation, zinc dipping, and then preparing a treatment solution, and then passing an electric current in the treatment solution to generate electric energy, so that a dense color film is formed on the surface of the magnesium alloy or aluminum alloy substrate of the pretreated anode. The components of the treatment solution and their weight percentages are: 20%-45% of potassium hydroxide, 30%-40% of aniline, and 20%-45% of potassium oxalate. The invention has simple process and basically no environmental pollution, and is suitable for the colorization of the galvanized layer of magnesium and aluminum alloy, and is also used for the colorization of the galvanized layer. The treatment solution has good stability, strong dispersing ability and deep plating ability, the obtained treatment film layer has good uniformity, and is excellently combined with the substrate, and the obtained dense oxide film in the form of colorful patterns is obtained.

Description

technical field [0001] The invention relates to a metal surface treatment process and its treatment solution formula, in particular to a magnesium alloy or aluminum alloy surface galvanized layer anodic oxidation colorization process and its treatment solution formula, belonging to the field of electroplating technology. Background technique [0002] Surface treatment plays a very important role in the application of magnesium, aluminum and their alloys. The decorative effect in the surface treatment process is a widely concerned issue in academia and business circles. The purpose of galvanizing the surface of magnesium and aluminum alloy is to use this technology to replace the environmental protection problems caused by the colorization of chromium conversion coating on the surface of magnesium and aluminum alloy. This technical creativity lies in the use of different colors reflected by zinc compounds in the surface finishing of magnesium and aluminum alloys. After lite...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C28/00
Inventor 蒋永锋郭兴伍翟春泉丁文江
Owner SHANGHAI AIERSI LIGHT ALLOY
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