CN105671571A - Method for removing aluminum oxidation film - Google Patents
Method for removing aluminum oxidation film Download PDFInfo
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- CN105671571A CN105671571A CN201410672063.1A CN201410672063A CN105671571A CN 105671571 A CN105671571 A CN 105671571A CN 201410672063 A CN201410672063 A CN 201410672063A CN 105671571 A CN105671571 A CN 105671571A
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- aluminum
- water
- sodium
- sodium phosphate
- oxidation film
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- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
The invention discloses a method for removing an aluminum oxidation film. The method is characterized by comprising the following technological steps that (1) degreasing treatment is conducted by soaking aluminum in a degreasing agent; (2) after degreasing, the aluminum is placed in a solution composed of ammonium bifluoride, chromic oxide, sodium phosphate, concentrated sulfuric acid, boric acid and water and soaked for 4.5-6 min at the temperature of 25-40 DEG C; and (3) the aluminum is washed in cold water for 3-5 min, wasted with distilled water for 10-15 min, and then dried at the temperature of 50-60 DEG C. According to the method for removing the aluminum oxidation film, the technology is simple; and through strict control over technological parameters, the descaling speed can be high, damage to a part substrate can be reduced, and the oxidation film can be removed more thoroughly.
Description
Technical field
The invention belongs to field of surface treatment, specifically a kind of method removing alumite.
Background technology
Aluminum, its surface is susceptible to oxidation, generate the oxide-film of a kind of densification, its oxide-film is loose porous, it is necessary to this eka-aluminum to be carried out anti-oxidation measure, the meeting aluminum parts to some very temperature sensitive in existing measure process, piece surface can be made to reach significantly high temperature, cause aluminum part deformation or crack, affecting the dimensional accuracy of part and normal use, time serious, also result in part breaking. In prior art, aluminum surface oxidation treatment technique being had complex process, step is many, and part base solid damage is serious, removes the shortcomings such as not thorough.
Summary of the invention
It is an object of the invention to for Shortcomings part in above-mentioned technology, the present invention provides a kind of method removing alumite, and its technique is simple, can descale, and can reduce part base solid damage, remove the advantages such as more thorough.
The technical scheme realizing the object of the invention is as follows:
A kind of method removing alumite, it is characterised in that its technique comprises the following steps:
(1) in degreasing agent, ungrease treatment is impregnated;
(2) after defat, aluminum is put in the solution being made up of ammonium acid fluoride, chromium oxide, sodium phosphate, concentrated sulphuric acid, boric acid, water, at 25-40 DEG C of temperature, impregnate 4.5-6min;
(3) in cold water, 3-5min is washed, distillation washing 10-15min, then 50-60 DEG C of drying.
Preferably, described degreasing agent according to following material with components by weight percent: water 80-90 part, sodium hydroxide 5-6 part, sodium carbonate 12-15 part, tri-sodium phosphate 6-8 part, sodium metasilicate 3-5 part, sodium tripolyphosphate 1-2 part;
Preferably, the solution of described ammonium acid fluoride, chromium oxide, sodium phosphate, concentrated sulphuric acid, boric acid, water composition, described ammonium acid fluoride, chromium oxide, sodium phosphate, concentrated sulphuric acid, boric acid, water ratio of weight and number be 3-3.5:20-28:2-2.5:50-65:0.4-0.6:1000.
A kind of method removing alumite of the present invention, its technique is simple, and by strict process parameter control, the speed that can descale is fast, can reduce part base solid damage, removes more thorough.
Detailed description of the invention
Below in conjunction with embodiment, the invention will be further described:
A kind of method removing alumite, its technique comprises the following steps:
(1) in degreasing agent, ungrease treatment is impregnated;
(2) after defat, aluminum is put in the solution being made up of ammonium acid fluoride, chromium oxide, sodium phosphate, concentrated sulphuric acid, boric acid, water, at 35 DEG C of temperature, impregnate 5min;
(3) in cold water, 4min is washed, distillation washing 12min, then 55 DEG C of drying.
Preferably, described degreasing agent according to following material with components by weight percent: 85 parts of water, sodium hydroxide 5.5 parts, sodium carbonate 13 parts, tri-sodium phosphate 7 parts, sodium metasilicate 4 parts, sodium tripolyphosphate 1.5 parts;
Preferably, the solution of described ammonium acid fluoride, chromium oxide, sodium phosphate, concentrated sulphuric acid, boric acid, water composition, described ammonium acid fluoride, chromium oxide, sodium phosphate, concentrated sulphuric acid, boric acid, water ratio of weight and number be 3:25:2:55:0.5:1000.
A kind of method removing alumite of the present invention, its technique is simple, and by strict process parameter control, the speed that can descale is fast, can reduce part base solid damage, removes more thorough.
The preferred embodiment of the present invention described in detail above. Should be appreciated that those of ordinary skill in the art just can make many modifications and variations according to the design of the present invention without creative work. All technical staff in the art, all should in the protection domain being defined in the patent claims under this invention's idea on the basis of existing technology by the available technical scheme of logical analysis, reasoning, or a limited experiment.
Claims (3)
1. the method removing alumite, it is characterised in that its technique comprises the following steps:
(1) in degreasing agent, ungrease treatment is impregnated;
(2) after defat, aluminum is put in the solution being made up of ammonium acid fluoride, chromium oxide, sodium phosphate, concentrated sulphuric acid, boric acid, water, at 25-40 DEG C of temperature, impregnate 4.5-6min;
(3) in cold water, 3-5min is washed, distillation washing 10-15min, then 50-60 DEG C of drying.
2. a kind of method removing alumite according to claim 1, it is characterized in that: described degreasing agent according to following material with components by weight percent: water 80-90 part, sodium hydroxide 5-6 part, sodium carbonate 12-15 part, tri-sodium phosphate 6-8 part, sodium metasilicate 3-5 part, sodium tripolyphosphate 1-2 part.
3. a kind of method removing alumite according to claim 1, it is characterized in that: the solution of described ammonium acid fluoride, chromium oxide, sodium phosphate, concentrated sulphuric acid, boric acid, water composition, described ammonium acid fluoride, chromium oxide, sodium phosphate, concentrated sulphuric acid, boric acid, water ratio of weight and number be 3-3.5:20-28:2-2.5:50-65:0.4-0.6:1000.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410672063.1A CN105671571A (en) | 2014-11-22 | 2014-11-22 | Method for removing aluminum oxidation film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410672063.1A CN105671571A (en) | 2014-11-22 | 2014-11-22 | Method for removing aluminum oxidation film |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105671571A true CN105671571A (en) | 2016-06-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410672063.1A Pending CN105671571A (en) | 2014-11-22 | 2014-11-22 | Method for removing aluminum oxidation film |
Country Status (1)
| Country | Link |
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| CN (1) | CN105671571A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107287584A (en) * | 2017-05-16 | 2017-10-24 | 合肥市瀚坤机械有限公司 | One kind takes door frame surface conditioning agent |
-
2014
- 2014-11-22 CN CN201410672063.1A patent/CN105671571A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107287584A (en) * | 2017-05-16 | 2017-10-24 | 合肥市瀚坤机械有限公司 | One kind takes door frame surface conditioning agent |
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Legal Events
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| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160615 |