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Treatment method for reducing emission of harmful substance generated by surface treatment of aluminum product

A technology of surface treatment and harmful substances, which is applied in the field of reducing the discharge of harmful substances produced by the surface treatment of aluminum products. It can solve the problems of environmental hazards, increase the cost and difficulty of sewage treatment, and achieve the improvement of acid and alkali corrosion resistance and comprehensive improvement. Utilization rate, effect of low energy consumption

Inactive Publication Date: 2020-01-14
ANHUI SHUNBANG FINE CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are a lot of harmful substances in the waste liquid produced after a series of reagent treatment, such as waste liquid containing organic compounds, heavy metal elements, fluorine elements, and various acid radical ions, which increases the cost and difficulty of sewage treatment and causes environmental damage. great harm

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A treatment method for reducing the discharge of harmful substances produced by surface treatment of aluminum products, including pre-degreasing, degreasing, water washing, and oxidation composite film-forming processes;

[0023] The formation process of the oxidation composite film is as follows: S1 Weigh 30 milliliters of glacial acetic acid with a molar concentration of 0.85 mol / liter, 80 milliliters of ethanol, and 150 milliliters of deionized water, and mix them uniformly as a solvent. The ester was slowly added to the solvent, ultrasonically dispersed for 5 minutes, and 55 ml of ammonium dihydrogen phosphate solution with a molar concentration of 0.27 mol / liter was slowly added dropwise to the ultrasonic dispersion, stirred at 35°C for 10 minutes, and the molar concentration used was 1.40 mol / L of ammonia water to adjust the pH value of the system between 6.4-6.5, at 25°C, stir at a speed of 45 rpm for 3 hours to obtain A sol for later use;

[0024] S2 Take a clea...

Embodiment 2

[0030] A treatment method for reducing the discharge of harmful substances produced by surface treatment of aluminum products, including pre-degreasing, degreasing, water washing, and oxidation composite film-forming processes;

[0031] The oxidation composite film formation process is as follows: S1 Weigh 35 milliliters of glacial acetic acid with a molar concentration of 0.88 mol / liter, 85 milliliters of ethanol, and 155 milliliters of deionized water, and mix them uniformly as a solvent. Under stirring, 36 milliliters of ethyl titanate The ester was slowly added to the solvent, ultrasonically dispersed for 7 minutes, and 58 ml of ammonium dihydrogen phosphate solution with a molar concentration of 0.28 mol / liter was slowly added dropwise to the ultrasonic dispersion, stirred at 38°C for 12 minutes, and the molar concentration used was 1.45 mol / L ammonia water to adjust the pH value of the system between 6.4-6.5, at 26°C, stir at a speed of 50 rpm for 3.5 hours to obtain A so...

Embodiment 3

[0038] A treatment method for reducing the discharge of harmful substances produced by surface treatment of aluminum products, including pre-degreasing, degreasing, water washing, and oxidation composite film-forming processes;

[0039] The formation process of the oxidation composite film is as follows: S1 Weigh 40 milliliters of glacial acetic acid with a molar concentration of 0.90 mol / liter, 90 milliliters of ethanol, and 160 milliliters of deionized water, and mix them uniformly as a solvent. The ester was slowly added to the solvent, ultrasonically dispersed for 10 minutes, and 60 ml of ammonium dihydrogen phosphate solution with a molar concentration of 0.30 mol / liter was slowly added dropwise to the ultrasonic dispersion, stirred at 40°C for 15 minutes, and the molar concentration used was 1.50 mol / L of ammonia water to adjust the pH value of the system between 6.4-6.5, at 28°C, stir at a speed of 55 rpm for 4 hours to obtain A sol for later use;

[0040] S2 Take a cle...

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PUM

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Abstract

The invention relates to the technical field of new material processing, and discloses a treatment method for reducing emission of harmful substance generated by surface treatment of an aluminum product. Through research on surface oxide film materials and a corrosion-resistant principle, the problem of high residue of harmful substances caused by traditional strong oxidizing agents is solved frominternal factors, and excessive ion exchange is avoided during the processing process. In an aluminum product surface treatment process, the process comprises pre-degreasing, degreasing, water washing and oxidation composite film forming processes, basic mixed formulations are obtained from a titanium oxide sol and a calcium-based composite zinc metal particle system, an oxidation film forming treatment is carried out, and the surface of the aluminum product forms an oxidation composite film which is uniform and fine in structure and excellent in corrosion resistance. The film layer and the aluminum surface are high in adsorption binding force, good in wear resistance, high in corrosion resistance strength and remarkable in acid-alkali corrosion resistance, and the processed aluminum product has excellent comprehensive performance.

Description

technical field [0001] The invention belongs to the technical field of new material processing, and in particular relates to a treatment method for reducing the emission of harmful substances produced by surface treatment of aluminum products. Background technique [0002] Aluminum alloy has low density, but relatively high strength, which is close to or exceeds high-quality steel. It has good plasticity and can be processed into various profiles. It has excellent electrical conductivity, thermal conductivity and corrosion resistance. It is widely used in industry, and its usage is second only to steel. The content of aluminum in the earth's crust is second only to oxygen and silicon, ranking third, and is the most abundant metal element in the earth's crust. Among metal varieties, it is the second largest category of metals after steel. It was not until the end of the 19th century that aluminum emerged as a competitive metal in engineering applications and was all the rage...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/08C25D11/10
CPCC25D11/08C25D11/10
Inventor 苗雪峰
Owner ANHUI SHUNBANG FINE CHEM
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