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Aluminum alloy profile surface passivation treatment process

A technology of aluminum alloy profiles and passivation treatment, which is applied in the direction of metal material coating technology, etc., can solve the problems of long-term hazards to the surrounding environment of operators, poor corrosion resistance of aluminum alloys, and large pollution, so as to improve the passivation effect and increase Drying speed, effect of eliminating pollution

Inactive Publication Date: 2020-03-27
湖州织里宝丰铝业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the corrosion resistance of the aluminum alloy itself is poor. In order to improve its corrosion resistance, passivation treatment is generally used to form a corrosion-resistant protective layer on the surface of the aluminum alloy to improve its corrosion resistance.
However, the existing passivation methods are all treated with passivation solution composed of hexavalent chromium solution, which has relatively large pollution and will cause long-term harm to operators and the surrounding environment.
Therefore, existing technology exists the bigger problem of pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Example 1. A surface passivation treatment process for aluminum alloy profiles, comprising the following steps:

[0025] A. The surface of the aluminum alloy profile is degreased and washed with water in sequence to obtain product A;

[0026] B. Alkali etching treatment is carried out on product A to obtain product B;

[0027] C. Carry out twice water washing, stain removal, ash removal and water washing three times to product B successively to obtain product C;

[0028] D. Carry out silane passivation treatment to product C for 10-15 minutes to obtain product D;

[0029] E, adopt deionized water to wash D product, obtain E product;

[0030] F, drying product E to obtain a finished product;

[0031] The specific process of drying treatment in step F is: first use a dryer with a temperature of 35-40°C to dry product E for 1-2 minutes to obtain product e1; then use a temperature of 65-70°C to dry product E1 Dry for 10-15s to obtain product e2; then, use a temperature...

Embodiment 2

[0033] Example 2. A surface passivation treatment process for aluminum alloy profiles, comprising the following steps:

[0034] A. The surface of the aluminum alloy profile is degreased and washed with water in sequence to obtain product A;

[0035] B. Alkali etching treatment is carried out on product A to obtain product B;

[0036] C. Carry out twice water washing, stain removal, ash removal and water washing three times to product B successively to obtain product C;

[0037] D, carry out silane passivation treatment to C product, the time is 13min, obtain D product;

[0038] E, adopt deionized water to wash D product, obtain E product;

[0039] F, drying product E to obtain a finished product;

[0040] The specific process of drying treatment in step F is as follows: first use a dryer with a temperature of 38°C to dry product E for 1 min to obtain product e1; then use a temperature of 70°C to dry product e1 for 10 seconds to obtain product e2 ; Then, use a temperature ...

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PUM

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Abstract

The invention discloses an aluminum alloy profile surface passivation treatment process. The process comprises the following steps that A, oil removal and primary water washing treatment are sequentially conducted on the surface of an aluminum alloy profile to obtain an A product; B, alkaline etching treatment is conducted on the A product to obtain a B product; C, secondary water washing, stain removal, ash removal and third water washing are sequentially conducted on the B product to obtain a C product; D, silane passivation treatment is conducted on the C product for 10-15 mins to obtain aD product; E, the D product is cleaned with deionized water to obtain an E product; and F, the E product is dried to obtain a finished product, wherein the specific process of drying treatment in thestep F comprises the following steps that firstly, the E product is dried for 1-2 min by a dryer at 35-40 DEG C to obtain an e1 product, the e1 product is dried for 10-15s at the temperature of 65-70DEG C to obtain an e2 product, then, the e2 product is dried for 1-2 min at the temperature of 50-55 DEG C to obtain an e3 product, and finally the temperature of the dryer is reduced to a room temperature at the linear cooling speed of 5-7 DEG C / min, so that a finished product is obtained. The process has the characteristic of being capable of effectively reducing pollution.

Description

technical field [0001] The invention relates to an aluminum alloy surface treatment process, in particular to an aluminum alloy profile surface passivation treatment process. Background technique [0002] Aluminum alloy profile is a material frequently used in industry. It has the advantages of light weight, high strength and easy shaping, and is widely used. However, the corrosion resistance of the aluminum alloy itself is poor. In order to improve its corrosion resistance, passivation treatment is generally used to form a corrosion-resistant protective layer on the surface of the aluminum alloy to improve its corrosion resistance. However, the existing passivation methods are all treated with passivation solution composed of hexavalent chromium solution, which has relatively large pollution and will cause long-term harm to operators and the surrounding environment. Therefore, the prior art has the problem of relatively large pollution. Contents of the invention [0003...

Claims

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Application Information

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IPC IPC(8): C23C22/34C23C22/78C23C22/82
CPCC23C22/34C23C22/78C23C22/82
Inventor 倪寿宝
Owner 湖州织里宝丰铝业有限公司
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