Chemical polishing agent

A chemical polishing and coupling agent technology, applied in the field of chemical polishing agents, can solve problems such as leaving gas marks, product abnormalities, corrosion, etc., and achieve the effect of reducing corrosion and ensuring stability

Active Publication Date: 2012-12-12
广州波耳化工科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing chemical polishing agent has the following defects: 1. The polishing agent is difficult to maintain. Generally, it will be completely poured out and replaced with a new polishing agent after 1-2 days of use; 2. The polished product is prone to abnormalities when transferred in the air (such as : continue to corrode); 3. The gas generated during the polishing process will overflow upward along the outer wall of the workpiece. When the gas overflows, it will leave gas marks on the surface of the workpiece. When the workpiece has holes, the gas marks will be more obvious
The glossiness of the gas mark is far from the glossiness of the gas part on the surface of the workpiece, which makes the overall gloss of the workpiece uneven

Method used

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  • Chemical polishing agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] At normal temperature and pressure, weigh the components specified in Table 1 and add them to water, and stir until each component is completely dissolved, so that the mass volume concentration of each component of the chemical polishing agent is shown in Table 1.

[0019] In this example, Al 3+ It is obtained by dissolving aluminum oxide, aluminum phosphate, aluminum sulfate and aluminum hydroxide, the coupling agent is vinyl silane, and the hydroxyl compound is ethylene glycol.

[0020] Pour the prepared chemical polishing agent into the tank and heat it so that the temperature of the liquid in the tank is 80°C. Dip the clamped aluminum alloy workpiece into the tank, swing the workpiece at a frequency of 35 times per minute, and take out the workpiece after 100 seconds.

[0021] Observe with the naked eye whether there are gas marks and pitting above the opening of the chemically polished aluminum workpiece, and place the workpiece in the air for 30 seconds to observ...

Embodiment 2

[0023] The method of Example 1 was repeated for each component specified in Table 1, and the test results are listed in Table 1. In this example, Al 3+ It is obtained by dissolving alumina, and the coupling agent is aminosilane.

Embodiment 3

[0025] The method of Example 1 was repeated for each component specified in Table 1, and the test results are listed in Table 1. In this example, Al 3+ It is obtained by dissolving aluminum phosphate, the coupling agent is methacryloxysilane, and the hydroxyl compound is glycerol.

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Abstract

The invention discloses an aluminum alloy chemical polishing agent applicable to automatic production. The chemical polishing agent comprises aqueous solutions of the following substances: according to mass-volume concentration, 790g/L to 880g/L of phosphoric acids, 100g/L to 250g/L of sulfuric acids, 10g/L to 50g/L of aluminum ions and 2g/L to 10g/L of coupling agents. According to the chemical polishing agent, the proportion of the phosphoric acids and the sulfuric acids is adjusted, and aluminum ions are further added, so that the corrosion of the polishing agent is reduced. The viscosity of the polishing agent is added by the adding of the coupling agents, so that the flow speed of gas released in the polishing process is changed, and the gas cannot leave gas marks on workpieces after the polishing; besides, as the coupling agents can be attached onto the workpiece surface, a layer of protection film is formed between highly corrosive acids and alloy surfaces, so that excessive corrosion caused by the continuous reaction of workpieces after the workpieces leave polishing grooves (during the slow transfer of the automatic production) is avoided, and further, the production stability is guaranteed, and requirements of automatic production is met.

Description

technical field [0001] The present invention relates to polishing agents, in particular to chemical polishing agents. Background technique [0002] Aluminum alloys are more and more widely used in daily life, especially in the casings of digital products. Aluminum alloy products need to be treated to obtain a more beautiful appearance, and in the automated production process, surface treatment methods such as chemical polishing are generally used. [0003] The existing chemical polishing agent has the following defects: 1. The polishing agent is difficult to maintain. Generally, it will be completely poured out and replaced with a new polishing agent after 1-2 days of use; 2. The polished product is prone to abnormalities when transferred in the air (such as : continue to corrode); 3. The gas generated during the polishing process will overflow upward along the outer wall of the workpiece. When the gas overflows, it will leave gas marks on the surface of the workpiece. When...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F3/03
Inventor 朱沛壬
Owner 广州波耳化工科技有限公司
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