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High-temperature nickel-free sealing agent for aluminum and aluminum alloy anodic oxide film

An anodized film, aluminum alloy technology, applied in electrolytic coatings, surface reaction electrolytic coatings, coatings, etc., can solve the problems of uneven surface color, unstable bath liquid, serious color flow, etc., to achieve less fading and good quality Color-fixing effect, good adaptability

Active Publication Date: 2018-01-19
ZHUHAI ALLMELUX CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The nickel-free sealers mainly based on magnesium salts and calcium salts launched on the market have unstable bath solution and easy to produce sealing dust. When sealing dyed parts, the color flow is serious, resulting in uneven surface color.

Method used

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  • High-temperature nickel-free sealing agent for aluminum and aluminum alloy anodic oxide film
  • High-temperature nickel-free sealing agent for aluminum and aluminum alloy anodic oxide film
  • High-temperature nickel-free sealing agent for aluminum and aluminum alloy anodic oxide film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A high-temperature nickel-free sealant for aluminum and aluminum alloy anodized films, comprising the following raw materials by volume and mass:

[0044]

[0045] The preparation method of the high-temperature nickel-free sealing agent comprises the following steps:

[0046] (1) Add 2 / 3 of the required amount of deionized water into the reaction vessel, heat to 45°C,

[0047] (2) Add unsaturated sodium alkyl sulfonate, quaternized polyvinylpyridine betaine, sodium polyacrylate, ammonium acetate, and the remaining deionized water in sequence at a stirring speed of 40 rpm.

[0048] (3) Stir for 10 minutes, at a stirring speed of 40 rpm,

[0049] (4) test to adjust the pH to 7,

[0050] (5) Continue to stir for 10 minutes at a stirring speed of 40 rpm.

Embodiment 2

[0052] A high-temperature nickel-free sealant for aluminum and aluminum alloy anodized films, comprising the following raw materials by volume and mass:

[0053]

[0054] The preparation method of the high-temperature nickel-free sealant is as in Example 1.

Embodiment 3

[0056] A high-temperature nickel-free sealant for aluminum and aluminum alloy anodized films, comprising the following raw materials by volume and mass:

[0057]

[0058]The preparation method of the high-temperature nickel-free sealant is as in Example 1.

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PUM

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Abstract

The invention discloses a high-temperature nickel-free sealing agent for an aluminum and aluminum alloy anodic oxide film. The high-temperature nickel-free sealing agent comprises the following raw materials of, by volume mass, 0.5-2.0 g / L of surface active agents, 0.1-0.5 g / L of fading inhibitors, 0.2-1.0 g / L of chelating agents, 1.0-5.0 g / L of pH buffering agents and the balance deionized water.According to the high-temperature nickel-free sealing agent, the pH value of a working solution of the sealing agent is 6.5-8.0, the working temperature is 85-95 DEG C, and the sealing speed is 0.5-1.0 [mu]m / min; and the aluminum and aluminum alloy anodic oxide film treated by the high-temperature nickel-free sealing agent is good in corrosion resistant performance and meets the GB / T 8753.2-2005requirement.

Description

technical field [0001] The invention belongs to the technical field of metal surface treatment, and in particular relates to a high-temperature nickel-free sealing agent for anodizing aluminum and aluminum alloys, a preparation method and a sealing treatment process for anodizing and dyeing aluminum and aluminum alloys. Background technique [0002] As an important surface treatment technology, aluminum and aluminum alloy anodizing technology can improve the protection, decoration and functionality of aluminum and aluminum alloy. Due to the existence of a large number of micropores, the anodized film without sealing is easily corroded when exposed to the environment, and its corrosion resistance, weather resistance, and pollution resistance cannot meet the requirements for use. Therefore, considering practical applications, aluminum And the micropores of anodized aluminum alloy must be sealed. [0003] The sealing of aluminum and aluminum alloy anodized films usually uses p...

Claims

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Application Information

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IPC IPC(8): C25D11/18
Inventor 敖中华文发余仁谢万丁
Owner ZHUHAI ALLMELUX CHEM