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A kind of preparation method of color electrophoretic coating film on the surface of deformed aluminum alloy containing magnesium and high silicon

A technology of deformed aluminum alloy and color electrophoresis, which is applied in the direction of surface reaction electrolytic coating, electrophoretic coating, electrolytic coating, etc., can solve the problems of poor decoration and poor corrosion resistance, increase the variety of designs and colors, strengthen competitiveness, and improve economic value Effect

Inactive Publication Date: 2011-12-07
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to make up for the international blank in the existing technology on the surface treatment of magnesium-containing and high-silicon deformed aluminum alloys, and aiming at the shortcomings of poor corrosion resistance and poor decoration of magnesium-containing and high-silicon deformed aluminum alloys, the invention provides a method for preparing a color electrophoretic coating film , coating the surface of magnesium-containing high-silicon deformed aluminum alloy with various colors of paint film to improve the corrosion resistance and decorative properties of magnesium-containing high-silicon deformed aluminum alloy

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Pretreatment

[0029] Select a magnesium-containing high-silicon deformed aluminum alloy workpiece with a silicon content of 10wt%, and pass it successively through 00 # Water sanding, 600 # Water sanding, 800 # Water sanding, 1000 # Grinding with water sandpaper, and then polishing with a polishing machine to make the workpiece form a glossy surface; then put it in acetone for 10 minutes for degreasing treatment; then put it in an alkali bath at 60 ° C for 3 minutes, the The composition of the mixed lye is: 5g / L NaOH, 20g / L NaOH 3 PO 4 and 20g / L Na 2 CO 3 ; After alkali etching, move the workpiece to the clear water tank for cleaning within 1 minute, and after staying for 1 minute, put it into the acid tank for pickling at a constant temperature of 98°C for 3 minutes. The composition of the mixed acid solution in the acid tank is: 600 g / L H with a mass concentration of 85% 3 PO 4 , 400 g / L mass concentration of 98% H 2 SO 4 , 3g / L Na 2 CO 3 ; Soak ...

Embodiment 2

[0036] The difference between Example 2 and Example 1 is that the formula of the electrophoretic solution is: 90mL / L water-soluble acrylic resin, 13g / L phthalocyanine blue, and 10mg / L dispersant to obtain a blue electrophoretic coating film with a thickness of 20 μm.

Embodiment 3

[0038] The difference between Example 3 and Example 1 is that the electrophoretic solution formula is: 100 mL / L water-soluble acrylic resin, 15 g / L phthalocyanine blue, and 10 mg / L dispersant to obtain a blue electrophoretic coating film with a thickness of 20 μm.

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Abstract

The invention relates to a surface treatment technology for alloys, in particular to a method for preparing a colored electrophoretic coating film on the surface of a magnesium-containing high-silicon deformed aluminum alloy. The technical solution of the invention includes pretreatment, DC anodic oxidation and anodic electrophoretic coating. The main point is to adjust the color by different dyes or dye ratios and control the process parameters of anodic oxidation and electrophoretic coating. Under the voltage of 130-140V, electrophoretic coating is carried out for 3 minutes, and a layer of colored paint is prepared on the surface of magnesium-containing high-silicon deformed aluminum alloy. The electrophoretic coating film improves the corrosion resistance and decoration of the surface of the magnesium-containing high-silicon deformed aluminum alloy, and all properties of the electrophoretic coating film of the invention reach or exceed national standards.

Description

technical field [0001] The invention belongs to the technical field of surface treatment, and in particular relates to a method for preparing a colored electrophoretic coating film on the surface of a deformed aluminum alloy containing magnesium and high silicon. Background technique [0002] Magnesium-containing high-silicon deformed aluminum alloy is a magnesium-containing high-silicon deformed aluminum alloy with a silicon content as high as 10-15wt%. It is a new type of aluminum alloy developed by my country with completely independent intellectual property rights. It is a typical resource-saving type , Environment-friendly high-performance and low-cost new materials. It has room temperature strength superior to 6XXX series deformed aluminum alloys and comparable plasticity, and has broad application space in civil and industrial fields. However, adding a high content of silicon to the aluminum matrix can improve its casting performance, increase the hardness and strengt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D13/04C25D11/18C09D5/44C09D133/00
Inventor 牛盾邹俊峰王林山李光禄于福晓
Owner NORTHEASTERN UNIV
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