An environment-friendly chemical polishing solution for high-gloss polishing of aluminum and aluminum alloys

A high-gloss, chemical polishing technology, used in the surface treatment industry, can solve the problems of difficult application of automatic lines, corrosion of air passages of parts, and high price, so as to improve residence time and uniformity, reduce COD value, and increase residence time. Effect

Active Publication Date: 2021-03-30
上海银木电器制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0018] The technical problem to be solved by the present invention is to provide an environment-friendly chemical polishing solution for high-gloss polishing of aluminum and aluminum alloys, which solves the problems of the three-acid polishing solution and commercial two-acid polishing solution commonly used in the market. Insufficient, resulting in the use of nitric acid to produce nitrogen oxides in chemical polishing fluids for aluminum and aluminum alloys, resulting in environmental pollution, complex components, difficult maintenance, high prices, parts prone to gas passage corrosion, parts prone to flow marks and difficult to apply Problems with automatic lines

Method used

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  • An environment-friendly chemical polishing solution for high-gloss polishing of aluminum and aluminum alloys

Examples

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Effect test

Embodiment 1

[0044] Example 1: An automatic aluminum alloy anodizing line of Shanghai Yinmu Electric Manufacturing Co., Ltd. is mainly engaged in the anodizing and coloring of a 6063 aluminum alloy notebook case. There are many heat dissipation holes and screw holes in the notebook case. The customer requires chemical polishing to be glossy The accuracy is 120±10% (incident angle is 60º), no flow marks visible to the naked eye, no visible airway corrosion in the heat dissipation holes and screw holes, the notebook shell is taken as a test piece for experiments, and the process specification of the chemical polishing solution is obtained for:

[0045]1. Base liquid: 85% concentrated phosphoric acid: 80% (mass fraction), 98% concentrated sulfuric acid: 20% (mass fraction),

[0046] 2. Additive: Sulfolane 75mL / L;

[0047] 3. Temperature: 95°C;

[0048] 4. Time: 150s;

Embodiment 2

[0049] Example 2: An aluminum alloy anodizing automatic line of Shanghai Yinmu Electric Manufacturing Co., Ltd. is mainly engaged in the anodizing and coloring of a 6063 aluminum alloy notebook case. There are many heat dissipation holes and screw holes in the notebook case, and the customer requires chemical polishing. Gloss The accuracy is 120±10% (incident angle is 60º), no flow marks visible to the naked eye, no visible airway corrosion in the heat dissipation holes and screw holes, the notebook shell is taken as a test piece for experiments, and the process specification of the chemical polishing solution is obtained for:

[0050] 1. Base liquid: 85% concentrated phosphoric acid: 90% (mass fraction), 98% concentrated sulfuric acid: 10% (mass fraction),

[0051] 2. Additive: Sulfolane 100mL / L;

[0052] 3. Temperature: 90°C;

[0053] 4. Time: 180s;

Embodiment 3

[0054] Example 3: An aluminum alloy anodizing automatic line of Shanghai Yinmu Electric Manufacturing Co., Ltd. is mainly engaged in the anodizing and coloring of a 6063 aluminum alloy notebook case. The notebook case has many heat dissipation holes and screw holes, and the customer requires chemical polishing. Gloss The accuracy is 120±10% (incident angle is 60º), no flow marks visible to the naked eye, no visible airway corrosion in the heat dissipation holes and screw holes, the notebook shell is taken as a test piece for experiments, and the process specification of the chemical polishing solution is obtained for:

[0055] 1. Base liquid: 85% concentrated phosphoric acid: 85% (mass fraction), 98% concentrated sulfuric acid: 15% (mass fraction),

[0056] 2. Additive: Sulfolane 60mL / L;

[0057] 3. Temperature: 87°C;

[0058] 4. Time: 100s;

[0059] The production line has an acid-resistant and heat-resistant stainless steel chemical polishing tank. The bottom is equipped ...

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Abstract

The invention discloses an environment-friendly chemical polishing liquid for high-glossiness polishing of aluminum and aluminum alloy, and belongs to the technical field of surface treatment industries. The environment-friendly chemical polishing liquid comprises a base liquid and an additive; the base liquid is prepared from, by mass, 80-90% of 85% concentrated phosphoric acid and 10-20% of 98%concentrated sulfuric acid; the additive is sulfolane and added according to the concentration of 25-100 mL / L. The environment-friendly chemical polishing liquid for the aluminum and aluminum alloy isdeveloped and has the advantages that the polishing liquid is used for automatic lines, does not use nitric acid or generate nitrogen oxides, has simple components and is easy to maintain, suitable in price and capable of meeting the high glossiness requirement, and airway corrosion and flow marks do not occur after parts are polished.

Description

technical field [0001] The invention relates to an environment-friendly chemical polishing liquid used for high-gloss polishing of aluminum and aluminum alloys, belonging to the technical field of surface treatment industry. Background technique [0002] Aluminum and aluminum alloys have the advantages of light weight and easy processing. They are one of the important metal materials and are widely used in various industries such as instrumentation, machinery, transportation, and daily hardware. In order to make up for the shortcomings of aluminum alloys such as poor corrosion resistance, low wear resistance, and poor decoration, surface treatment must be carried out on it. Polishing of aluminum and its alloys is a crucial step in the surface treatment process. For example, the anodic oxidation coloring of aluminum alloy mobile phone shells and computer shells, chemical polishing is an indispensable pre-treatment process. There are many common aluminum and aluminum alloy p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23F3/03
CPCC23F3/03
Inventor 周虎强
Owner 上海银木电器制造有限公司
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