Hole sealing agent for aluminum profile anode oxide films and low-nickel medium-temperature hole sealing method

A technology of anodic oxide film and sealing agent, which is applied in electrolytic coatings, surface reaction electrolytic coatings, coatings, etc., to reduce the cost of sealing, suppress the problem of sealing dust, and reduce the problem of environmental pollution.

Active Publication Date: 2015-09-16
南京鸿发有色金属制造股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a fast sealing agent for the anodic oxidation film of aluminum profiles and a low-nickel medium-temperature sealing method, which can reduce the concentration of nickel discharge by half, and can be widely used in silver-white, electrolytic coloring films and The sealing of the dyed anodic oxide film reduces the cost of sealing holes, thereby reducing the environmental pollution problems existing in the sealing process under the premise of ensuring normal production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] 1. Blocking solution composition: Ni2+ 0.6g / L, hydroxytriethylamine 0.6g / L, cerium acetate 0.06g / L, H2O2 0.005g / L, succinic acid 0.05 g / L, Tween-80 (polyoxyethylene (20EO) sorbitan monooleate) 0.03g / L, PEG400 0.02g / L, adjust the pH to 6.5 with acetic acid.

[0043] 2. Process conditions: temperature 50°C, impregnation for 20 minutes.

[0044] 3. Wash twice.

[0045] 4. Dry in air.

[0046] 5. Inspection, there is no water stain on the test surface, and there is no powder cream on the surface with wet test paper. After 48 hours, the ISO3210 standard weight loss is 25.0mg / dm2, and the nickel discharge concentration is 0.3g / L.

Embodiment 2

[0048] 1. Blocking solution composition: Ni2+ 0.3g / L, hydroxytriethylamine 0.2g / L, cerium acetate 0.03g / L, Tween-80 (polyoxyethylene (20EO) sorbitan monooleate) 0.02g / L, PEG400 0.0g / L, adjust the pH to 6.2 with acetic acid.

[0049] 2. Process conditions: temperature 60°C, impregnation for 20 minutes.

[0050] 3. Wash twice.

[0051] 4. Dry in air.

[0052] 5. Inspection, there is no water stain on the test surface, and there is no powder cream on the surface with wet test paper. After 48 hours, the ISO3210 standard weight loss is 28.0mg / dm2, and the nickel discharge concentration is 0.3g / L.

Embodiment 3

[0054] 1. Blocking solution composition: Ni2+ 0.5g / L, hydroxytriethylamine 0.4g / L, cerium acetate 0.04g / L, H2O2 0.004g / L, Teen-80 (polyoxyethylene (20EO) sorbitan monooleate) 0.03g / L, PEG400 0.02g / L, adjust the pH to 5.8 with acetic acid.

[0055] 2. Process conditions: temperature 40°C, impregnation for 20 minutes.

[0056] 3. Wash twice.

[0057] 4. Dry in air.

[0058] 5. Inspection, there is no water stain on the test surface, and there is no powder frost on the surface with wet test paper. After 48 hours, the ISO3210 standard weight loss is 25.5mg / dm2, qualified, and the nickel discharge concentration is 0.5g / L.

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PUM

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Abstract

The invention provides a quick hole sealing agent for aluminum profile anode oxide films, which comprises a solid hole sealing agent and a liquid additive. The solid hole sealing agent is nickel salt, and comprises one or combination of more of nickel sulfate, nickel nitrate, nickel acetate and nickel ions. The liquid additive comprises the following components in percentage by weight: 1-2% of non-nickel metal salt, 5-10% of hydration accelerator, 1-2% of complexing agent, 0.1-0.5% of passivator, 0.5-1% of ash inhibitor and the balance of water. The quick hole sealing agent for aluminum profile anode oxide films can lower the nickel discharge concentration by more than half, can be widely used for sealing silvery white electrolytic coloring films and dyed anode oxide films, thoroughly inhibits the problem of hole sealing ash, and lowers the hole sealing cost to some extent, thereby relieving the problem of environmental pollution in the hole sealing technique on the premise of ensuring normal production.

Description

technical field [0001] The invention relates to the technical field of anodic oxidation post-treatment of aluminum profiles, in particular to a low-nickel medium-temperature hole sealing method for anodic oxidation films of aluminum profiles. Background technique [0002] In order to improve the surface properties of aluminum profiles, the hot-extruded aluminum material is placed in a sulfuric acid electrolyte for anode direct current oxidation, so that a layer of porous nano-structured film is formed on the surface. The advantage of this porous film is that it can be adsorbed or electrified. Coloring has good surface protection and decoration properties, but the open membrane pores have strong adsorption properties, which will accelerate corrosion in a corrosive environment and reduce its anti-corrosion performance. [0003] In order to solve the corrosion resistance of the porous film, chemical methods are used to block the nanopores of the oxide film or make it in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/24
Inventor 陈祥建
Owner 南京鸿发有色金属制造股份有限公司
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