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Hard anode oxidation process

A kind of hard anodizing and process technology, applied in anodizing, electrolytic coating, surface reaction electrolytic coating, etc., can solve the problems of affecting oxidization, easy to react, not yet found, etc., to achieve the effect of improving corrosion resistance time

Inactive Publication Date: 2019-01-11
TORRANCE SEMICON EQUIP QIDONG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the existing general anodic oxidation process, various acidic solutions are mixed to form an oxidizing solution, and the aluminum alloy is oxidized in the oxidizing solution. The mixing of various acidic solutions is prone to reaction, which affects the oxidation performance, and the corrosion resistance is less than 2 hours.
After retrieval, patent number CN103484913A aluminum alloy hard anodic oxidation treatment process, patent number CN107805836A a kind of anodic oxidation method for cast aluminum alloy hard oxidation, all propose adding a certain amount of oxalic acid in the electrolyte solution with sulfuric acid solution as the base liquid Waiting for other solutions to form a mixed acid solution, a hard anodic oxidation process that can improve the corrosion resistance of aluminum alloys for more than 4 hours has not been found

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] A hard anodic oxidation process, the specific steps are as follows:

[0060] A. Hanging: Titanium clips and titanium screws are used for hanging up to ensure that the parts are conductive;

[0061] B. Degreasing: Put the parts into the alkaline degreasing solution for degreasing, the degreasing time is 5min, and the temperature is 46°C;

[0062] C. The first water washing: After the surface of the parts in step B is free of grease, marks, scratches and surface water does not gather, open the overflow, the water quality is ≥ 200kΩ, put the parts into the washing tank and lift them out of the liquid surface of the washing tank. Carry out fan-shaped spray washing on the parts from top to bottom, the washing time is 60s, and the temperature is 15°C;

[0063] D. Alkali bite: put the parts into 45g / L sodium hydroxide solution, the alkali bite time is 30s, the temperature is 32°C, hang the parts after alkali bite out of the liquid surface, spray water on the parts from top to...

Embodiment 2

[0082] A hard anodic oxidation process, the specific steps are as follows:

[0083] A. Hanging: Titanium clips and titanium screws are used for hanging up to ensure that the parts are conductive;

[0084] B. Degreasing: Put the parts into the alkaline degreasing solution for degreasing. The degreasing time is 8 minutes and the temperature is 50°C;

[0085] C. The first water washing: After the surface of the parts in step B is free of grease, marks, scratches and surface water does not gather, open the overflow, the water quality is ≥ 200kΩ, put the parts into the washing tank and lift them out of the liquid surface of the washing tank. Carry out fan-shaped spray washing on the parts from top to bottom, the washing time is 80s, and the temperature is 20°C;

[0086] D. Alkali bite: Put the parts into 50g / L sodium hydroxide solution, the alkali bite time is 50s, the temperature is 35°C, hang the parts after alkali bite out of the liquid surface, spray water on the parts from to...

Embodiment 3

[0105] A specific embodiment of a hard anodic oxidation process of the present invention, the specific steps are as follows:

[0106] A. Hanging: Titanium clips and titanium screws are used for hanging up to ensure that the parts are conductive;

[0107] B. Degreasing: Put the parts into the alkaline degreasing solution for degreasing, the degreasing time is 10min, and the temperature is 55°C;

[0108] C. The first water washing: After the surface of the parts in step B is free of grease, marks, scratches and surface water does not gather, open the overflow, the water quality is ≥ 200kΩ, put the parts into the washing tank and lift them out of the liquid surface of the washing tank. Carry out fan-shaped spray washing on the parts from top to bottom, the washing time is 90s, and the temperature is 25°C;

[0109] D. Alkali bite: put the parts into 55g / L sodium hydroxide solution, the alkali bite time is 60s, the temperature is 40°C, hang the parts after alkali bite out of the l...

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Abstract

The invention relates to a hard anode oxidation process. The hard anode oxidation process comprises the following specific steps of A, hanging up; B, degreasing; C, first-time water washing; D, alkalietching; E, second-time water washing; F, acid etching; G, third-time water washing; H, ash removing; I, fourth-time water washing; J, first-time oxidizing; K, second-time oxidizing; L, fifth-time water washing; M, hole sealing with pure water; N, sixth-time water washing; O, seventh-time water washing; P, blow-dry; Q, hanging down; R, hot water washing; S, blow-dry with nitrogen; T, baking; andU, packaging. The process has the advantages of being simple and convenient and capable of effectively improving the corrosion resistance time.

Description

Technical field: [0001] The invention relates to a hard anodic oxidation process. Background technique: [0002] Hard anodizing of aluminum alloys is mainly used for engineering or military purposes, and it is suitable for both wrought aluminum alloys and die-cast alloy parts. The hard anodic oxide film generally requires a thickness of 25-150um, and the thickness of most hard anodic oxide films is 50-80um, and the hard anodic oxide film with a film thickness of less than 25um is used for the zero The thickness of the anodic oxidation film for parts, wear resistance or insulation is about 50um. At present, the more common hard anodic oxidation process is the low temperature sulfuric acid hard anodic oxidation process. In order to ensure that the hardness, wear resistance and film thickness of the film layer meet the requirements , The operating temperature of the electrolyte must be kept below 5°C. [0003] In the existing general anodic oxidation process, various acidic s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/08C25D11/10C25D11/12C25D11/16C25D11/18
CPCC25D11/08C25D11/10C25D11/12C25D11/16C25D11/18
Inventor 朱俊
Owner TORRANCE SEMICON EQUIP QIDONG CO LTD
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