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Coloring dye and aluminum alloy die casting brown coloring method

A technology for aluminum alloys and die-casting parts, which is applied in the field of coloring dyes and brown coloring of aluminum alloy die-casting parts, which can solve the problems of single coloring and other problems.

Inactive Publication Date: 2018-06-01
JIANGHAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In order to solve the problem of single coloring of aluminum alloy die castings in the prior art, the embodiment of the present invention provides a coloring dye and a brown coloring method of aluminum alloy die castings

Method used

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  • Coloring dye and aluminum alloy die casting brown coloring method

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Embodiment 1

[0032] An embodiment of the present invention provides a colored dye, the colored dye includes: acid red, acid black and glacial acetic acid, wherein the concentration of acid red is 4-12g / L, and the concentration of acid black is 0.2-2.5g / L, The concentration of the glacial acetic acid is 0.1-5g / L. The coloring dye is suitable for coloring high-silicon aluminum alloy die-castings, wherein the high-silicon aluminum alloy die-casting refers to an aluminum alloy die-casting with a silicon content greater than 10%.

[0033] Because the molecular weights of acid red, acid black and glacial acetic acid in the colored dye of the present invention are all less than 1000, according to Dalton's empirical table, the molecular weight is 1000, and the corresponding aperture is 0.001 μm. filter membrane, and the colored dye can pass through the filter membrane smoothly, which proves that the colored dye is smaller than 1nm.

[0034] The coloring dyes provided by the embodiments of the pre...

Embodiment 2

[0036] An embodiment of the present invention provides a brown coloring method for aluminum alloy die-castings, which is suitable for coloring high-silicon aluminum alloy die-castings, wherein high-silicon aluminum alloy die-castings refer to aluminum alloy die-castings with a silicon content greater than 10%. combine figure 1 , the method includes:

[0037] Step 1: Surface pretreatment, including:

[0038] Removal of residual oil stains on aluminum alloy die castings; specifically, chemical methods such as acid or lye cleaning can be used to remove residual oil stains on aluminum alloy die castings.

[0039] The surface of the aluminum alloy die casting is polished; specifically, the surface of the aluminum alloy die casting can be polished by mechanical polishing or chemical polishing.

[0040] Washed aluminum alloy die castings;

[0041] Soak the aluminum alloy die casting in concentrated nitric acid for 5-10 minutes to obtain an aluminum alloy die casting covered with a...

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Abstract

The invention discloses coloring dye and an aluminum alloy die casting brown coloring method, and belongs to the field of aluminum alloy die casting coloring. The coloring dye comprises acid red, acidblack and water solution of glacial acetic acid, wherein the concentration of the acid red is 4-12 g / L; the concentration of the acid black is 0.2-2.5 g / L; and the concentration of the glacial aceticacid is 0.1-5 g / L. The method comprises the following steps: aluminum alloy die castings are colored by adopting the coloring dye; and the coloring dye comprises the acid red, the acid black and thewater solution of the glacial acetic acid. The coloring dye can color brown on the aluminum alloy die castings; and the aluminum alloy die casting brown coloring method colors brown on the aluminum alloy die castings to achieve metal gloss.

Description

technical field [0001] The invention relates to the field of coloring of aluminum alloy die castings, in particular to a coloring dye and a brown coloring method of aluminum alloy die castings. Background technique [0002] Aluminum alloy coloring refers to the formation of a film layer with a certain color on the surface of aluminum alloy by chemical impregnation, electrochemical method and heat treatment method, and the film layer has a certain corrosion resistance. [0003] At present, only the method of coloring aluminum alloy die-castings into bronze color is not available, and the method of coloring aluminum alloy die-castings into brown color includes passivation, anodic oxidation, coloring and sealing treatment on the surface of the aluminum alloy to be colored , in the coloring process, acid yuanqing, alizarin yellow and glacial acetic acid are used as coloring dyes. [0004] In the process of realizing the present invention, the inventor finds that there are at le...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/14C25D11/08C25D11/24C25D9/02
CPCC25D11/14C25D9/02C25D11/08C25D11/246
Inventor 冯俊
Owner JIANGHAN UNIVERSITY
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