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

An anodizing method and a treatment solution technology, which are applied in the field of metal surface treatment process and treatment solution formulation, anodizing process of metal alloy surface immersion zinc layer anodization colorization process and treatment solution formulation field, can solve problems such as environmental pollution, and achieve No environmental pollution, good uniformity and simple process

Inactive Publication Date: 2004-02-25
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 more than 3 / 4 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 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 more than 3 / 4 distilled water into the 10L tank, then add 350g potassium hydroxide, 350g potassium oxalate and 300g aniline in sequence, then add water to the predetermined volume, and 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 more than 3 / 4 distilled water into the 5L tank, add 125g potassium hydroxide, 200g potassium oxalate and 175g aniline in sequence, then add water to the predetermined volume, and 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, and 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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Abstract

Firstly, pretreating metal base body as anode, i.e. degreasing, acid cleaning, alkali washing, activating, zinc-soaking and preparing treatment solution, applying electric current in the treatment solution to produce electric energy so as to make the surface of metal base body have a layer of compact colour film. The composition of said treatment solution includes (wt%) 20%-45% of potassium hydroxide, 30%-40% of aniline and 20%-45% of potassium oxalate.

Description

technical field [0001] The invention relates to a metal surface treatment process and its treatment solution formula, in particular to a metal alloy surface zinc-dipping layer anodic oxidation colorization process and its treatment solution formula, belonging to the technical field of electroplating. 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 literature search, it was...

Claims

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Application Information

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Patent Type & Authority Applications(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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