Pre-sealing agent for aluminum oxidation and treatment method

Abstract

The invention discloses a pre-sealing agent for aluminum oxidation and a treatment method. In each liter of water, the pre-sealing agent is prepared from the following components: 0.001-10g of hexafluorozirconic acid, 0.001-10g of water-soluble molybdenum salt, 0.001-10g of potassium fluorozirconate, 0.001-10g of potassium fluoride, 0.001-10g of sodium fluoride, and 0.001-10g of thiourea. The pre-sealing agent for aluminum oxidation is invented through a large number of experiments, nickel-free sealing agent treatment is performed after the pre-sealing agent is adopted, color fading of an aluminum-oxidized workpiece in the pre-sealing and sealing process can be effectively reduced, and a nickel salt sealing effect exceeding a traditional effect is achieved in terms of weightlessness, and is far superior to the national standard of 30mg / dm<2>. The pre-blocking agent can pass most of tolerance tests of mainstream manufacturers, can further obtain excellent ultraviolet light resistance, and has broad application prospects.

Description

technical field [0001] The technical field of aluminum oxidation of the present invention, in particular, relates to a sealing agent and a treatment method for aluminum oxidation. Background technique [0002] Aluminum and its alloy materials have a series of excellent physical and chemical properties, and can be used in construction materials, electronic products, cosmetic packaging materials, etc. In application, the industry widely uses anodizing technology to treat the surface of aluminum materials to meet the requirements of decoration and durability. Specifically, aluminum or aluminum alloys are soaked in an acid solution, and a direct current is applied at the same time. Under the combined action of the two, an electrochemical change occurs on the surface of the aluminum alloy to produce a porous anode film layer. The porosity of the film layer It can absorb organic or inorganic dyes to achieve the decorative effect on aluminum parts. But at the same time, the poros...

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Problems solved by technology

[0006] 1. Extensive use of nickel salts will cause great pollution to water bodies and the natural environment. Nickel-containing compounds have been listed as a class I carcinogen by the World Health Organization

[0007] 2. The solution containing nickel salt needs to be heated when it is closed, and there will be continuous steam generation in the workshop. Workers working in this environment for a long time will cause great harm to their health.

[0008] 3. Nickel salt will remain on the surface of the aluminum alloy after sealing, and the customer will directly contact the skin when using it, resulting in allergic reactions and rashes

[0009] However, if a sealant that does not contain nickel salts is used, although the above problems will not occur, the color of the sealed aluminum alloy product will be lost in large quantities, and all indicators (corrosion resistance, dirt resistance, UV resistance, etc.) will be reduced after sealing. Unable to meet customer needs

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