Acidic degreasing liquid for aluminum alloy

A technology of degreasing liquid and aluminum alloy, which is applied in the field of degreasing treatment agent for aluminum alloy, which can solve the problems of low cost, high cost of bath solution, and surfactant pollution, etc., and achieve stable and reliable degreasing performance

Inactive Publication Date: 2012-01-04
合肥华清高科表面技术股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Aluminum and aluminum alloys must undergo degreasing and degreasing treatment before surface treatment. The early degreasing process mainly uses the degreasing process of steel, that is, the bath solution is Na2CO3, Na2SiO3, Na3PO4 solution, the operating temperature is 40-70 ℃, and the time 5 to 15 minutes, this process has stable performance and long service life, but the cost of the bath solution is high and it is not easy to clean, so it is basically not used now
[0003] In the 1960s, people used NaOH or Na2CO3 to add Na3PO4, complexing agents, nonionic surfactants, and anionic surfactants to degrease at room temperature for 3 to 5 minutes. Flocculant precipitation, complexing agents and surfactants are easily brought into subsequent tanks to cause pollution. Currently, only a few factories are still in use

Method used

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  • Acidic degreasing liquid for aluminum alloy
  • Acidic degreasing liquid for aluminum alloy
  • Acidic degreasing liquid for aluminum alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The acid degreasing fluid for aluminum alloy, based on 1L degreasing fluid, consists of the following raw materials:

[0018]

[0019]

[0020] The preparation method of acid degreasing liquid for aluminum alloy includes the following steps:

[0021] First, add 0.5L of tap water to the tank, slowly add a proportion of concentrated sulfuric acid (d=1.84) under stirring, and cool to 40°C;

[0022] Secondly, add ammonium bifluoride, citric acid, sodium nitrate, iron sulfate, dipropylene glycol and sodium dodecylbenzene sulfonate in proportions in sequence, and stir until completely dissolved;

[0023] Finally, add water to 1L and mix well.

Embodiment 2

[0025] The acid degreasing fluid for aluminum alloy, based on 1L degreasing fluid, consists of the following raw materials:

[0026]

[0027] The preparation method of acid degreasing liquid for aluminum alloy includes the following steps:

[0028] First, add 0.5L of tap water to the tank, slowly add a proportion of concentrated sulfuric acid (d=1.84) under stirring, and cool to 40°C;

[0029] Secondly, add ammonium bifluoride, citric acid, sodium nitrate, iron sulfate, dipropylene glycol and octylphenol polyoxyethylene ether in proportions in sequence, and stir until completely dissolved;

[0030] Finally, add water to 1L and mix well.

Embodiment 3

[0032] The acid degreasing fluid for aluminum alloy, based on 1L degreasing fluid, consists of the following raw materials:

[0033]

[0034] The preparation method of acid degreasing liquid for aluminum alloy includes the following steps:

[0035] First, add 0.5L of tap water to the tank, slowly add a proportion of concentrated sulfuric acid (d=1.84) under stirring, and cool to 40°C;

[0036] Secondly, add ammonium bifluoride, citric acid, sodium nitrate, iron sulfate, dipropylene glycol and nonylphenol polyoxyethylene ether in proportions in sequence, and stir until completely dissolved;

[0037] Finally, add water to 1L and mix well.

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Abstract

The invention discloses a degreasing treating agent for aluminum alloy and in particular relates to acidic degreasing liquid for aluminum alloy. The acidic degreasing liquid for the aluminum alloy is characterized in that: 1 liter of degreasing liquid consists of the following raw materials: 100 to 150 grams of sulfuric acid, 3 to 8 grams of ammonium bifluoride, 2 to 4 grams of nitric acid, 1 to 3 grams of sodium nitrate, 0.5 to 1.5 grams of ferric sulfate, 1 to 2 grams of dipropylene glycol and 0.1 to 0.5 gram of surfactant. The acidic degreasing liquid for aluminum alloy can achieve good degreasing effect at room temperature by using the sulfuric acid as base solution and other additives as auxiliary materials. The degreasing agent comprises components of an oxidizing agent, a surfactant, high-valence metal ions and the like, can be used for acid dipping of the aluminum metal, can be used for a long time, and is stable and reliable in degreasing property.

Description

Technical field [0001] The invention discloses a degreasing treatment agent for aluminum alloys, in particular to an acidic degreasing liquid for aluminum alloys. Background technique [0002] Aluminum and aluminum alloys must undergo degreasing and degreasing treatment before surface treatment. The early degreasing process mainly used the degreasing process of steel, that is, the bath solution is Na2CO3, Na2SiO3, Na3PO4 solution, and the operating temperature is 40~70℃. 5~15min, this kind of process has stable performance and long life, but the tank liquid cost is high, and it is not easy to clean, it is basically not used now. [0003] In the 1960s, people used NaOH or Na2CO3 to add Na3PO4, complexing agents, nonionic surfactants, and anionic surfactants to degreasing at room temperature for 3 to 5 minutes. The oil removal efficiency is high, the cost is low, and energy saving, but the tank liquid is easy to produce Flocculent precipitation, complexing agents and surfactants are...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23G1/12
Inventor 刘万青饶丹
Owner 合肥华清高科表面技术股份有限公司
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