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Section aluminum anode oxide film copper salt electrolytic coloring production process

An anodic oxidation film, electrolytic coloring technology, applied in electrolytic coating, surface reaction electrolytic coating, coating, etc., can solve the problems of no mass production, poor corrosion resistance of the film layer, uneven film color, etc., and achieve strong durability Corrosion resistance, strong weather resistance, uniform color film effect

Active Publication Date: 2018-12-21
FOSHAN HAIHUA SURFACE TREATMENT TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are many kinds of electrolytic coloring processes for aluminum alloy materials, but the copper salt coloring technology has obvious color difference after coloring due to the difficult edge effect and tip discharge, and the treated product is corrosion-resistant after the subsequent process. Poor performance, uneven film color, and even obvious color change and fading problems are the reasons why mass production has not been formed.

Method used

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  • Section aluminum anode oxide film copper salt electrolytic coloring production process
  • Section aluminum anode oxide film copper salt electrolytic coloring production process
  • Section aluminum anode oxide film copper salt electrolytic coloring production process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A production process of copper salt electrolytic coloring of anodic oxidation film of aluminum profiles, comprising the following processing steps: degreasing, water washing, water washing, anodizing, water washing, water washing, activation process, electrolytic coloring, water washing, water washing, sealing and water washing treatment processes, The electrolytic coloring agent in the described electrolytic coloring step comprises the following components by weight percentage:

[0024]

[0025] The composition of bath liquid in described electrolytic coloring tank is:

[0026]

[0027] The remaining amount of water in the tank solution in the electrolytic coloring tank refers to the preparation of the electrolytic colorant with a concentration of 30-50g / L, free sulfuric acid with a concentration of 18-25g / L and pentasine with a concentration of 15-25g / L. The amount of water used to hydrate copper sulfate.

[0028] In the electrolytic coloring treatment step, th...

Embodiment 2

[0040]On the basis of Example 1, this Example 2 is used as a preferred embodiment, wherein the electrolytic coloring agent in the electrolytic coloring step includes the following components by weight percentage:

[0041]

[0042] The composition of bath liquid in described electrolytic coloring tank is:

[0043]

[0044]

[0045] In the electrolytic coloring treatment step, the temperature of the bath solution in the electrolytic coloring tank is 21°C, the voltage is 18v, and the coloring time is 4.5 minutes.

[0046] The pyrophosphate is a mixture of sodium pyrophosphate and potassium pyrophosphate in a ratio of 1:1.

[0047] In the chemical activation step, the composition of the chemical activation treatment liquid is: 5% phosphoric acid, 3% aluminum chloride, 5% sulfuric acid, 3% inorganic salt, 4% organic compound, water balance, wherein, current density: 2.0A / dm 2 , the treatment temperature is 13°C, and the treatment time is 4min.

[0048] The inorganic sa...

Embodiment 3

[0053] On the basis of Example 1, this Example 3 is used as a preferred embodiment, wherein the electrolytic coloring agent in the electrolytic coloring step includes the following components by weight percentage:

[0054]

[0055]

[0056] The composition of bath liquid in described electrolytic coloring tank is:

[0057]

[0058] In the electrolytic coloring treatment step, the temperature of the bath solution in the electrolytic coloring tank is 22°C, the voltage is 19v, and the coloring time is 8 minutes.

[0059] The pyrophosphate is sodium pyrophosphate and / or potassium pyrophosphate.

[0060] In the chemical activation step, the composition of the chemical activation treatment liquid is: phosphoric acid 8%, aluminum chloride 5%, sulfuric acid 6%, inorganic salt 4%, organic compound 5%, water balance, wherein, current density: 2.5A / dm 2 , the processing temperature was 15°C, and the processing time was 1 min.

[0061] The inorganic salt is sodium phosphate o...

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Abstract

The invention discloses a section aluminum anode oxide film copper salt electrolytic coloring production process. The section aluminum anode oxide film copper salt electrolytic coloring production process comprises the following treatment steps of oil removing, washing, washing, anodizing, washing, washing, an activation working procedure, an electrolytic coloring, washing, washing, hole sealing and a washing treatment working procedure and is characterized in that an electrolytic coloring agent in the electrolytic coloring step comprises, by weight percent, 2%-8% of copper sulfate, 20%-40% ofmagnesium sulfate, 4%-6% of sulfuric acid, 1%-3% of a dispersing agent, 5%-10% of pyrophosphate, 3%-7% of EDTA and the balance water, a bath solution in an electrolytic coloring trough is composed of30g / L-50g / L of the electrolytic coloring agent, 18 g / L-25 g / L of free sulphuric acid, 5g / L-25 g / L of copper sulfate pentahydrate and the balance water, and in the electrolytic coloring treatment step, the temperature of the bath solution in the electrolytic coloring trough is 20 DEG C-22 DEG C, the voltage is 16v-19v, and the coloring time is 0.5min-0.8min. A coloring film layer color system of section aluminum prepared through the coloring production process is complete, uniform, stable and good in quality, a color fading problem does not exist in the using process, relatively high corrosionresistance is achieved, and volume production can be formed.

Description

technical field [0001] The invention relates to the technical field of surface treatment and decoration of aluminum and aluminum alloy products, in particular to a copper salt electrolytic coloring production process of anodic oxidation film of aluminum profiles. Background technique [0002] Aluminum alloy extrusion profiles are widely used, and its surface treatment technology has achieved rapid development. In order to improve the protection and decoration performance of aluminum alloy profiles, it is necessary to carry out anodic oxidation and electrolytic coloring treatment on aluminum alloy materials. At present, there are many kinds of electrolytic coloring processes for aluminum alloy materials, but the copper salt coloring technology has obvious color difference after coloring due to the difficult edge effect and tip discharge, and the treated product is corrosion-resistant after the subsequent process. Poor performance, uneven film color, and even obvious color cha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/22C25D11/24C25D11/18
CPCC25D11/18C25D11/22C25D11/246
Inventor 王相刚夏良文肖茂强
Owner FOSHAN HAIHUA SURFACE TREATMENT TECH CO LTD
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