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Aluminum alloy anodic oxidation surface treatment process

A technology of anodizing and surface treatment, which is applied in the direction of anodizing, electrolytic coating, electrophoretic plating, etc., to achieve the effect of improving corrosion resistance

Inactive Publication Date: 2016-11-23
NINGBO XINTAI MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide an aluminum alloy anodic oxidation surface treatment process, which can improve the quality of sealing holes and make up for the problem of poor sealing

Method used

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  • Aluminum alloy anodic oxidation surface treatment process
  • Aluminum alloy anodic oxidation surface treatment process
  • Aluminum alloy anodic oxidation surface treatment process

Examples

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Comparison scheme
Effect test

Embodiment 1

[0021] Test sample specification: 40*100*2mm EN AW 6401 (extrusion profile), the obtained sample number is A, and the sample number is A according to figure 1 The process steps shown are for treatment, anodizing: anodizing the metal to form an oxide film on the metal surface; scalding: immerse the anodized metal in a hot water tank for scalding for 5 minutes, the hot water tank is filled with pure water, and the water temperature is 50 °C; Water washing: immerse the scalded metal in a recovery tank for washing and soaking for 1 minute, the recovery tank contains pure water, the pH value of the pure water is less than 7.5; electrophoresis: immerse the washed metal in the electrophoresis tank for electrophoresis, the pH in the electrophoresis tank The value is controlled at 7.5; baking curing: bake the metal after electrophoresis, the baking curing temperature is 165 ° C, and the curing time is 20 minutes; high temperature water (steam) post-treatment: put the baked and cured coa...

Embodiment 2

[0023] Test sample specification: 40*100*2mm EN AW 6401 (extruded profile), the obtained sample number is B, and the sample number is B according to figure 1 The process steps shown are for treatment, anodizing: anodizing the metal to form an oxide film on the metal surface; scalding: immerse the anodized metal in a hot water tank for 6 minutes and scald it for 6 minutes. The hot water tank is filled with pure water, and the water temperature is 75 °C; Water washing: immerse the scalded metal in a recovery tank for washing and soaking for 2 minutes, the recovery tank contains pure water, the pH value of the pure water is less than 7.5; electrophoresis: immerse the washed metal in the electrophoresis tank for electrophoresis, the pH in the electrophoresis tank The value is controlled at 8; baking curing: bake the metal after electrophoresis, the baking curing temperature is 180 ° C, and the curing time is 30 minutes; high temperature water (steam) post-treatment: put the baked a...

Embodiment 3

[0025] Test sample specification: 40*100*2mm EN AW 6401 (extrusion profile), the obtained sample number is C, and the sample number is C according to figure 1 The process steps shown are for treatment, anodizing: anodizing the metal to form an oxide film on the metal surface; scalding: immerse the anodized metal in a hot water tank for scalding for 5.5 minutes, the hot water tank is filled with pure water, and the water temperature is 65 °C; Water washing: immerse the scalded metal in a recovery tank for washing and soaking for 1.5 minutes, the recovery tank contains pure water, the pH value of the pure water is less than 7.5; electrophoresis: immerse the washed metal in the electrophoresis tank for electrophoresis, the pH in the electrophoresis tank The value is controlled at 7.7; baking and curing: bake the metal after electrophoresis, the baking and curing temperature is 173 ° C, and the curing time is 25 minutes; high-temperature water (steam) post-treatment: put the baked ...

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Abstract

The invention belongs to the technical field of anodic oxidation technology, and provides an aluminum alloy anodic oxidation surface treatment process, which comprises the following steps: anodic oxidation, scalding, water washing, electrophoresis, baking and curing, and high-temperature water (steam) post-treatment. The advantage of the present invention is that by adding a high-temperature water (steam) post-treatment process, the cured product is reheated in a hot water bath or steam, and the incomplete oxidation of the electrophoretic hole sealing is performed by using the hot water or steam molecules penetrating through the ED layer. The hole is further sealed, which can solve the defects of the existing anodic oxidation ED sealing process, such as whitening of dripping water, etc., and can further improve the corrosion resistance of the material.

Description

technical field [0001] The invention belongs to a post-treatment process of electrophoresis after aluminum oxidation. This post-treatment process includes water-containing processes such as hot water or steam treatment after ED baking. The production technology field includes: auto parts industry, construction industry and electronics industry The invention relates to oxidation sealing of aluminum products, specifically relates to an aluminum alloy anodic oxidation surface treatment process, in particular to a production process of an aluminum alloy anodic oxidation organic coating electrophoresis. Background technique [0002] Aluminum has a particularly strong chemical affinity for oxygen, and its surface is always covered by a dense oxide film in the atmosphere, but the natural aluminum oxide film is extremely thin, with large porosity, low mechanical strength, corrosion resistance and wear resistance. Neither can meet the needs of anti-corrosion. Using electrochemical m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/04C25D13/00
CPCC25D11/04C25D13/22
Inventor 傅相林沈杰
Owner NINGBO XINTAI MACHINERY
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