Nickel-free and fluoride-free sealing agent for aluminum and aluminum alloy anode oxide films

A technology of anodic oxidation film and aluminum alloy, which is applied in the field of anodic oxidation post-treatment of aluminum and aluminum alloy, can solve the problems of high waste water treatment cost, environmental pollution, and great human damage, and achieves good corrosion resistance, simple preparation method, and easy operation convenient effect

Inactive Publication Date: 2018-05-11
HANGZHOU WIN WIN TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing sealing technologies for aluminum and aluminum alloy anodized films usually use metal salts as the main agent of the sealing agent, most of which contain fluorine and nickel, which will not only cause high wastewater treatment costs, pollute the environment, but also cause great damage to the human body

Method used

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  • Nickel-free and fluoride-free sealing agent for aluminum and aluminum alloy anode oxide films
  • Nickel-free and fluoride-free sealing agent for aluminum and aluminum alloy anode oxide films
  • Nickel-free and fluoride-free sealing agent for aluminum and aluminum alloy anode oxide films

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preparation example Construction

[0023] The preparation method of the above-mentioned nickel-free and fluorine-free sealing agent for aluminum and aluminum alloy anodic oxidation film includes the following steps: adding the hydration accelerator, pH buffer agent, dust suppressant, and wetting agent in the formula amount to deionized water, mixing evenly, Obtain the blocking agent.

[0024] The method for using the nickel-free and fluorine-free sealing agent for aluminum and aluminum alloy anodized films prepared above includes the following steps: dilute the sealing agent to 3-20ml / L with deionized water, and adjust the pH to 5.5-6.5 with acetic acid and sodium acetate , preferably adjust the pH to 5.8-6.2 to obtain a working solution, and seal the workpiece by immersing it in the working solution at 75-95°C, preferably 85-90°C, at a sealing speed of 1.0-2.0min / μm.

Embodiment 1

[0051] After weighing according to the following combination, add deionized water to make a 10L solution, heat to 90°C for sealing:

[0052]

Embodiment 2

[0064] After weighing according to the following combination, add deionized water to make a 10L solution, heat to 90°C for sealing:

[0065]

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Abstract

The invention discloses a nickel-free and fluoride-free sealing agent for aluminum and aluminum alloy anode oxide films. The sealing agent is prepared from the following components of 1-15g/L of a hydration accelerant, 0.1-5g/L of a pH buffer agent, 0.01-0.1g/L of an ash inhibitor, 0.1-0.5g/L of a wetting agent and the balance deionized water. The sealing agent has the advantages that heavy metalpollution in wastewater treatment can be avoided, in addition, the oxide films with good corrosion resistance can be obtained, the experimental requirement of GB/T 8753.1-2005 phosphochromic acid canbe met, the films are uniform and smooth, the dye speck resistance performance is good, and hole sealing of the natural-color anode oxide film and the dyed anode oxide film can be simultaneously realized; and a concentrated formula is provided, a preparation method is simple, and the operation is convenient.

Description

technical field [0001] The invention relates to the technical field of anodic oxidation post-treatment of aluminum and aluminum alloy, in particular to a nickel-free and fluorine-free sealing agent for anodic oxidation film of aluminum and aluminum alloy. Background technique [0002] Aluminum and its alloy materials have a series of excellent physical and chemical properties, which can meet the different requirements for the use of aluminum and aluminum alloy materials in industries such as architectural decoration, cosmetics, and electronic information. However, some performances of aluminum and aluminum alloys, such as wear resistance and corrosion resistance, cannot meet the requirements, and surface treatment technology can effectively make up for this defect. The main surface treatment technology used in the industry is anodic oxidation. Aluminum and aluminum alloys are anodized to form an anodized film with a controllable film thickness and porous structure, which has...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/24
CPCC25D11/246
Inventor 金波愔
Owner HANGZHOU WIN WIN TECH CO LTD
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