Chemical Polishing Fluid for Aluminum Alloy Frosted Exterior Parts and Its Application

A technology of chemical polishing and aluminum alloy, which is applied in the field of polishing liquid, can solve the problems such as difficulty in meeting the requirements of sandblasting exterior parts, and achieve the effect of excellent polishing effect, low cost and safe operation

Inactive Publication Date: 2017-01-25
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the aluminum alloy chemical polishing liquid mainly used in the market is still based on the three-acid system of "sulfuric acid-phosphoric acid-nitric acid" and the improved two-acid system of "sulfuric acid-phosphoric acid". These chemical polishing liquids are easy to obtain a mirror bright effect, but Difficulty meeting requirements for blasted exterior trim

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] In the chemical polishing solution of this embodiment, the volume ratio of sulfuric acid (mass percentage concentration 98%) to acrylic acid is 3:1, and the concentration of the remaining components in the mixed solution of sulfuric acid and acrylic acid is:

[0020] Tartaric acid 6.0g / L;

[0021] Sodium persulfate 23.0 g / L;

[0022] Leucine and niacin (mass ratio 2:1) 5.5 g / L.

[0023] The preparation method of the above chemical polishing liquid: after mixing sulfuric acid and acrylic acid, add tartaric acid, sodium persulfate and nitrogen-containing organic brighteners (leucine and nicotinic acid) into the mixture of sulfuric acid and acrylic acid in turn, and stir slowly until dissolved Evenly, a polishing solution is obtained. The polishing fluid is clear, evenly mixed, without stratification and foam.

[0024] Application of the above polishing solution: heat the temperature of the polishing solution to 105°C, and then keep it warm. After the aluminum alloy is ...

Embodiment 2

[0027] In the chemical polishing solution of this embodiment, the volume ratio of sulfuric acid (mass percentage concentration 98%) to acrylic acid is 2:1, and the concentration of the remaining components in the mixed solution of sulfuric acid and acrylic acid is:

[0028] Tartaric acid 7.0g / L

[0029] Sodium persulfate 15.0 g / L

[0030] Leucine and hexamethylenetetramine (mass ratio 2:1) 3.5 g / L

[0031] The preparation method of the above-mentioned chemical polishing solution: after mixing sulfuric acid and acrylic acid, add tartaric acid, sodium persulfate and nitrogen-containing organic brighteners (leucine and hexamethylenetetramine) to the mixture of sulfuric acid and acrylic acid in sequence, slowly Stir until it dissolves evenly to obtain a polishing solution. The polishing fluid is clear, evenly mixed, without stratification and foam.

[0032] Application of the above polishing solution: heat the temperature of the polishing solution to 105°C, and then keep it war...

Embodiment 3

[0035] In the chemical polishing liquid of this embodiment, the volume ratio of sulfuric acid (mass percentage concentration 98%) to acrylic acid is 4.5:1, and the concentration of the remaining components in the mixed solution of sulfuric acid and acrylic acid is:

[0036] Tartaric acid 4.0g / L

[0037] Sodium persulfate 39.0 g / L

[0038] Niacin 2.5 g / L

[0039] The preparation method of the above-mentioned chemical polishing liquid: after mixing sulfuric acid and acrylic acid, add tartaric acid, sodium persulfate and nitrogen-containing organic brightener (nicotinic acid) into the mixture of sulfuric acid and acrylic acid in sequence, and stir slowly until the solution is uniform to obtain polishing liquid. The polishing fluid is clear, evenly mixed, without stratification and foam.

[0040] Application of the above polishing solution: heat the temperature of the polishing solution to 95°C, and then keep it warm. After the aluminum alloy goes through the process of "sand b...

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Abstract

The invention discloses a chemical polishing solution for aluminum alloy frosted exterior trimming parts and application of the chemical polishing solution. The chemical polishing solution is prepared from tartaric acid, sodium persulfate and a mixed solution which is formed by dissolving a nitrogenous organic brightener into sulfuric acid and acrylic acid, wherein the volume ratio of sulfuric acid to acrylic acid is (2-6):1, the mass percent concentration of sulfuric acid is 98%, and the concentrations of the rest components in the mixed solution of sulfuric acid and acrylic acid are as follows: the concentration of tartaric acid is 4.0-7.0g / L, the concentration of sodium persulfate is 15.0-40.0g / L, and the concentration of the nitrogenous organic brightener is 2.5-5.5g / L. The chemical polishing solution disclosed by the invention is short in polishing time and convenient and quick to operate, has a good polishing effect on sandblast aluminum alloy pieces and a good frosting effect, belongs to environment-friendly formulas and has good application prospect.

Description

technical field [0001] The invention relates to a polishing liquid, in particular to a chemical polishing liquid for aluminum alloy frosted exterior trim parts and its preparation. Background technique [0002] Because of its light weight, easy molding and good decorative properties, aluminum alloys are often used as exterior parts, such as the casings of mobile phones and tablet computers. In order to obtain an exterior finish with a frosted effect, the process of "sand blasting - degreasing - water washing - pickling - water washing - chemical polishing - water washing - anodizing" is often used in the surface treatment process of aluminum alloy exterior parts. The treatment process, in which the chemical polishing process is very critical, requires not only to maintain the frosting effect, but also to achieve a certain degree of brightness. At present, the aluminum alloy chemical polishing liquid mainly used in the market is still based on the three-acid system of "sulfu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23F3/03
Inventor 任呈强付贵刘丽李佳蒙康俊伟
Owner SOUTHWEST PETROLEUM UNIV
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