Chemical oxidation treatment solution of aluminum and aluminum alloy

A technology of chemical oxidation and solution treatment, which is applied in the coating process of metal materials, etc., can solve the problems of environmental pollution and harmfulness in the surrounding area, and achieve the effects of low cost, easy availability of raw materials, and reasonable formula

Inactive Publication Date: 2013-10-30
TIANCHANG JINGFA ALUMINUM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the commonly used chemical solution is chromate solution, and the chromate oxidation process contains hexavalent chromium, which is extremely harmful to the human body and the environment, and its environmental protection problems such as pollution to the surrounding environment have become increasingly prominent

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A chemical oxidation treatment solution for aluminum and aluminum alloys, an aqueous solution with a pH value between 5 prepared from the following components by mass volume percentage:

[0021] Sodium molybdate 1%; Trisodium phosphate 1%; Potassium permanganate 0.1%; Sodium fluoride 0.2%; Sodium aluminate 1%; Sodium citrate 0.2%.

[0022] When in use, first use an alkaline degreasing solution to remove the oil on the surface of aluminum or aluminum alloy parts, then use acid to remove the oxygen film on the surface of aluminum or aluminum alloy parts after washing, and place it in the chemical oxidation treatment solution of the present invention to oxidize after washing. , After 2 minutes of treatment, wash with water, and dry with cold air to get a uniform light yellow, smooth film layer.

Embodiment 2

[0024] A chemical oxidation treatment solution for aluminum and aluminum alloys, an aqueous solution with a pH value between 5 prepared from the following components by mass volume percentage:

[0025] Sodium molybdate 1%; tripotassium phosphate 1%; potassium permanganate 0.1%; potassium fluoride 0.2%; potassium aluminate 1%; potassium citrate 0.2%.

[0026] When in use, first use an alkaline degreasing solution to remove the oil on the surface of aluminum or aluminum alloy parts, then use acid to remove the oxygen film on the surface of aluminum or aluminum alloy parts after washing, and place it in the chemical oxidation treatment solution of the present invention to oxidize after washing. , After 2 minutes of treatment, wash with water, and dry with cold air to get a uniform light yellow, smooth film layer.

Embodiment 3

[0028] A chemical oxidation treatment solution for aluminum and aluminum alloys, an aqueous solution with a pH value between 5 prepared from the following components by mass volume percentage:

[0029] Sodium molybdate 1%; Triammonium phosphate 1%; Potassium permanganate 0.1%; Ammonium fluoride 0.2%; Ammonium aluminate 1%; Ammonium citrate 0.2%.

[0030] When in use, first use an alkaline degreasing solution to remove the oil on the surface of aluminum or aluminum alloy parts, then use acid to remove the oxygen film on the surface of aluminum or aluminum alloy parts after washing, and place it in the chemical oxidation treatment solution of the present invention to oxidize after washing. , After 2 minutes of treatment, wash with water, and dry with cold air to get a uniform light yellow, smooth film layer.

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PUM

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Abstract

The invention discloses a chemical oxidation treatment solution of aluminum and aluminum alloy. The solution with pH value between 4.0 and 6.0 is prepared from the following components in mass volume percent: 0.1-2% of sodium molybdate, 0.05-2% of phosphate, 0.01-0.3% of manganese compound, 0.05-0.5% of fluoride, 0.1-2% of aluminate and 0.05-0.5% of citrate. The solution disclosed by the invention is reasonable in formulation, the components are free from heavy metals such as chromium and lead, the influence on the environment is small. The solution can be produced without a special device at normal temperature, and can be used at mild treatment condition and simple process; and the application range is wide.

Description

technical field [0001] The invention relates to the technical field of aluminum surface treatment, relates to an oxidation treatment solution, in particular to a chemical oxidation treatment solution for aluminum and aluminum alloys. Background technique [0002] Aluminum and aluminum alloys have excellent physical and chemical properties such as light weight, good electrical and thermal conductivity, strong light reflection, and easy processing, and are widely used in aerospace, mechanical electronics, transportation, petrochemical and other fields. In order to improve the corrosion resistance and wear resistance of aluminum and aluminum alloys, aluminum and aluminum alloys must undergo corresponding surface treatment before use. [0003] Although aluminum and aluminum alloys can naturally form a layer of oxide film in the atmosphere, the film is thin, loose and porous, and it is an amorphous, uneven and non-continuous film layer, which cannot be used as a reliable protecti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/44
Inventor 俞金发
Owner TIANCHANG JINGFA ALUMINUM IND
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