Aluminum alloy surface pretreatment method

An aluminum alloy surface and pretreatment technology, which is applied in the field of aluminum alloy surface treatment, can solve problems such as high water consumption and pollutant discharge, and achieve the effects of low water consumption, environmental friendliness, and resource conservation

Active Publication Date: 2019-03-12
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the defects of serious pollutant discharge and high water consumption in the existing aluminum alloy surface pretreatment process, the present invention provides a low-pollution and low-water-consumption aluminum alloy surface pretreatment method to achieve , to reduce pollutant discharge and reduce water consumption

Method used

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  • Aluminum alloy surface pretreatment method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] 1) Take the 6063 aluminum alloy and wash it with clean water;

[0037] 2) Put it into the alkali etching solution for integrated treatment of alkali etching and degreasing, and the composition of the alkali etching agent is Na 2 CO 3 , NaOH, Na 3 PO 4 , Na 2 SO 4 , sodium dodecylsulfonate, glycerin and sodium citrate, the concentration of each component is 10g / L, the temperature of the alkali etching solution is 40°C, and the integrated treatment time of alkali etching and degreasing is 10min;

[0038] 3) After the integrated treatment of alkali etching and degreasing is completed, wash with deionized water twice, each time is 1min;

[0039] 4) The aluminum profile after washing is neutralized. The main components and concentrations of the neutralizing solution are: sulfuric acid 100g / L, nitric acid 100g / L, the neutralization temperature is 25°C, and the neutralization time is 2min;

[0040] 5) After the neutralization treatment, the aluminum alloy was washed twic...

Embodiment 2

[0044]1) Take the 6063 aluminum alloy and wash it with clean water;

[0045] 2) Put it into the alkali etching solution for integrated treatment of alkali etching and degreasing. The main component of the alkali etching agent is Na 2 CO 3 , NaOH, Na 3 PO 4 , Na 2 SO 4 , sodium dodecylsulfonate, glycerin and sodium citrate, the concentration of each component is 15g / L, the temperature of the alkali etching solution is 55°C, and the integrated treatment time of alkali etching and degreasing is 8 minutes;

[0046] 3) After the integrated treatment of alkali etching and degreasing is completed, wash with deionized water twice, each time is 2 minutes;

[0047] 4) The aluminum profile after washing is neutralized. The main components and concentrations of the neutralizing solution are: sulfuric acid 120g / L, nitric acid 120g / L, neutralization temperature is 25°C, and neutralization time is 1min;

[0048] 5) After the neutralization treatment, wash the aluminum alloy twice with ...

Embodiment 3

[0052] 1) Take the 3003 aluminum alloy and wash it with clean water;

[0053] 2) Put it into the alkali etching solution for integrated treatment of alkali etching and degreasing. The main component of the alkali etching agent is Na 2 CO 3 , NaOH, Na 3 PO 4 , Na 2 SO 4 , the concentration of each component is 20g / L, the temperature of the alkali etching agent solution is 50°C, and the integrated treatment time of alkali etching and degreasing is 15min;

[0054] 3) After the integrated treatment of alkali etching and degreasing is completed, wash with deionized water twice, each time is 2 minutes;

[0055] 4) The aluminum profile after washing is neutralized. The main components and concentrations of the neutralizing solution are: 100g / L sulfuric acid, 100g / L nitric acid, the neutralization temperature is 25°C, and the neutralization time is 1min;

[0056] 5) After the neutralization treatment, wash the aluminum alloy twice with deionized water, each time being 2 minutes;...

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Abstract

The invention relates to a low-pollution, low-water-consumption and alkali-etching oil-removing integrated aluminum alloy surface pretreatment method. The method comprises the following steps: 1) placing aluminum alloy into an alkali-etching agent solution and performing alkali-etching oil-removing treatment; 2) washing; 3) placing into a neutralizing solution and performing neutralizing treatment; 4) washing; 5) blow-drying. Compared with the traditional acid etching process, the method has the advantages that fluorine and ammonia nitrogen pollution is avoided, aluminum consumption is similar and water consumption is greatly reduced. Compared with the traditional alkali etching process, the method has the advantages of low aluminum consumption, low water consumption, short process flow and high efficiency. The method not only eliminates the fluorine and ammonia nitrogen pollution from the source of the process, but also has the advantages of low aluminum consumption, low water consumption, short flow and high efficiency, and has the characteristics of environmental friendliness and resource saving.

Description

technical field [0001] The invention relates to the field of aluminum alloy surface treatment, in particular to a method for pretreatment of aluminum alloy surface with low pollution and low water consumption. Background technique [0002] Aluminum alloy is a general term for aluminum-based alloys. The main alloying elements are copper, silicon, magnesium, zinc, and manganese, and the secondary alloying elements are nickel, iron, titanium, chromium, and lithium. Aluminum alloy is currently the largest and most widely used non-ferrous metal in the world. Because of its excellent physical and chemical properties, it is widely used in construction, transportation, machinery manufacturing, electronics, packaging materials, electric power, daily necessities and other fields. my country is a big country in the manufacture and consumption of aluminum alloy products. In 2012, my country's aluminum output reached 30.373 million tons, a year-on-year increase of 15.87%. However, alum...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23F1/36
Inventor 刘庆芬张超黄啸竹
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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