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Aluminum and aluminum alloy anode oxidation film high alkali resistant sealant and sealing method

An anodic oxidation film and anodic oxidation technology, applied in the field of chemical technology, can solve the problems of inconvenient production control, cumbersome steps, high cost, etc., and achieve the effect of easy production control

Inactive Publication Date: 2019-01-18
保定诺博汽车装饰件有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the aluminum and aluminum alloy workpieces processed by the above method meet the high alkali resistance requirements, they need two or three steps of sealing treatment, which is cumbersome, inconvenient for production control, and high in cost

Method used

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  • Aluminum and aluminum alloy anode oxidation film high alkali resistant sealant and sealing method

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Embodiment 1

[0035] An embodiment of the present invention provides a highly alkali-resistant sealing agent for anodic oxidation films of aluminum and aluminum alloys. The sealing agent includes: nickel acetate, dispersant, surfactant, fluoride, and deionized water as the balance.

[0036] Preferably, the mass fraction of the nickel acetate is 7%-10%, the mass fraction of the dispersant is 0.2%-0.5%, the mass fraction of the surfactant is 0.2%-0.5%, and the fluoride The mass fraction is 1%-3%.

[0037] In the embodiment of the present invention, the content of each component is represented by mass fraction, and the content of each component only needs to be within the above range, for example, 7%, 8%, 9%, 10% or 7%- 0.2%, 0.3%, 0.4%, 0.5% or dispersant of any value within the range of 0.2%-0.5% can be added to nickel acetate with a mass fraction of any value within the range of 10%, and 0.2% can be added %, 0.3%, 0.4%, 0.5% or any mass fraction of surfactant within the range of 0.2%-0.5%,...

Embodiment 2

[0047] The embodiment of the present invention proposes a method for sealing aluminum and aluminum alloy anodized films with high alkali resistance,

[0048] Refer to attached figure 1 , the specific steps of the method include:

[0049] Step 1: Carry out anodic oxidation on aluminum and aluminum alloy workpieces to obtain objects to be sealed.

[0050] The anodic oxidation is a conventional oxidation operation of related processes in this field, and technicians can select and adjust the anodic oxidation process according to the actual situation to obtain the best oxidation effect.

[0051] The anodizing protocol used in this protocol is listed below.

[0052] Further, the step of anodizing the aluminum and aluminum alloy to obtain the object to be sealed includes:

[0053] Degreasing: put the aluminum and aluminum alloy workpieces into 30g / L alkaline degreasing agent, and treat them at 50°C for 5-10 minutes;

[0054] Electropolishing: immerse the degreased aluminum and al...

Embodiment 3

[0068] A kind of high alkali-resistant sealing agent, by weight 1kg, take the following raw materials by the following weight: nickel acetate 90g, sodium lauryl sulfate 2g, sodium methylene bis-naphthalene sulfonate 3g, ammonium bifluoride 20g, the above-mentioned The raw materials were added to an appropriate amount of deionized water, fully stirred and dissolved, and configured into a 1kg sealing agent.

[0069] The process is as follows:

[0070] The workpiece material is 6063 aluminum alloy.

[0071] Degreasing: the workpiece is treated with 30g / L alkaline degreasing agent at 50°C for 10 minutes;

[0072] Electropolishing: immerse the degreased workpiece in a mixture of phosphoric acid 800g / L and sulfuric acid 350g / L for electropolishing for 15 minutes;

[0073] Alkali cleaning: immerse the electropolished workpiece in 30g / L sodium hydroxide solution for 1min;

[0074] Illumination: immerse the workpiece after alkali washing in 170g / L sulfuric acid solution for 1min;

...

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Abstract

The invention provides an aluminum and aluminum alloy anode oxidation film high alkali resistant sealant and a sealing method. The sealant is prepared from nickel acetate, a dispersing agent, a surfactant, a fluoride and the balance of deionized water. The method is that: after aluminum and aluminum alloy workpieces are conventionally anodized, the sealant is immersed for one-step sealing. According to the sealant and the sealing method, one-step sealing treatment is adopted to obtain the aluminum and aluminum alloy workpieces satisfying the industry requirements of resistance to alkali pH 12.5, salt spray resistance and condensed water resistance, sealing steps are fewer, the production control is easy, and the sealing cost is lower.

Description

technical field [0001] The invention relates to the technical field of chemical technology, in particular to a highly alkali-resistant sealing agent for aluminum and aluminum alloy anodic oxidation films and a high alkali-resistant sealing method for aluminum and aluminum alloy anodic oxidation films. Background technique [0002] With the development of industry and people's growing demand for lightweight, aluminum and aluminum alloys are more and more widely used in automobile manufacturing, and they are important components of new car bodies. Since alkaline cleaning agents are often used in the car cleaning process, the automotive industry has high requirements for the alkali corrosion resistance of aluminum and aluminum alloy parts. [0003] In the prior art, only a small number of sealing processes meet the requirements set by the automobile industry. For example, aluminum and aluminum alloys are anodized first, and then a two-step sealing process is adopted. First, th...

Claims

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Application Information

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IPC IPC(8): C25D11/24
CPCC25D11/24
Inventor 张斗刘少鹏
Owner 保定诺博汽车装饰件有限公司
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