CN101705494A - Cleaning method for removing grease and scale formation from aluminum alloy sheet material surface - Google Patents
Cleaning method for removing grease and scale formation from aluminum alloy sheet material surface Download PDFInfo
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- CN101705494A CN101705494A CN200910217785A CN200910217785A CN101705494A CN 101705494 A CN101705494 A CN 101705494A CN 200910217785 A CN200910217785 A CN 200910217785A CN 200910217785 A CN200910217785 A CN 200910217785A CN 101705494 A CN101705494 A CN 101705494A
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- scale formation
- water washing
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- aluminum alloy
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- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
The invention discloses a cleaning method for removing grease and scale formation from aluminum alloy sheet material surface, which comprises the steps of chemical degreasing, warm water washing, cold water washing and hot water dying and is characterized by adding four steps of alkaline degreasing, warm water washing, stain removing and cold water washing behind the step of cold water washing. Adopt a chemical method, the invention uses sodium hydroxide and aluminum to react for removing black scale formation, floating and corrosion trace, and uses a mechanical tearing effect in chemical reaction to satisfy the welding technical requirement for removing gentian violet trace in the machining process of figure number and quality material mark blotting; the invention omits the step that black scale formation needs to be rubbed out by an angle grinder before welding, thus having no dust pollution and lowering labor intensity, and improves production efficiency, and remarkably enhancing product quality proved by no oil foulant on surface (including inner cavities), no loose film or dust, no floating, no scale formation, true aluminum color, uniform surface status, no scaly corrosion or excessive corrosion on aluminum matrix, no damage on screwed hole, and no working solution residual in cavities and processed through holes (or screwed holes).
Description
Technical field
The present invention relates to a kind of purging method of removing aluminum alloy sheet material surface grease and oxide skin.
Background technology
At present, the aluminum alloy sheet material surface purging method has only degreasing and rinse water two procedures, can only remove surperficial grease, can't remove black oxidation skin, the quenching artificial aging that thermal treatment produces and deposit to produce and grow dim or evidence of corrosion and figure number, material trade mark trace, and Viola crystallina mark, cooling fluid in the mechanical processing process.The black oxidation skin must be removed with the angle grinding machine before welding, dust pollution is not only arranged, and labour intensity is big.
Summary of the invention
Technical problem to be solved by this invention provides a kind of purging method of removing aluminum alloy sheet material surface grease and oxide skin, this method can be removed black oxidation skin, the quenching artificial aging that thermal treatment produces and deposit to produce and grow dim or evidence of corrosion and figure number, material trade mark trace, and Viola crystallina mark, cooling fluid in the mechanical processing process, thereby obtain the uniform base aluminum of no burn into condition of surface.
For solving the problems of the technologies described above, the invention provides a kind of aluminum alloy sheet material surface and remove the purging method of grease and oxide skin, comprise that chemical degreasing, Warm Wash, cold wash and hot water scald to do, it is characterized in that: cold wash after, increase alkaline etching → Warm Wash → except that four steps of stain → cold wash.
Alkaline etching is raw materials used to be by sodium hydroxide and alkaline etching agent 6-7 by weight percentage: 1 mixes, and temperature is 55-65 ℃, time 4-5 minute.
Remove stain and adopt salpeter solution, temperature is a room temperature, and content is 320-380g/l, time 1-3 minute.
Positively effect of the present invention: the employing chemical process is utilized sodium hydroxide and aluminum chemistry to react and is removed the black oxidation skin, grows dim, evidence of corrosion, utilize the mechanical tear effect removal figure number in the chemical reaction, the Viola crystallina mark in the material trade mark trace mechanical processing process, satisfy the welding technique requirement; Must grind off black oxidation skin operation with the angle grinding machine before saving welding, no dust pollution, reduce labor intensity; Enhance productivity; Significantly improve quality product, show that surperficial (containing inner chamber) no greasy dirt dirt, the loose rete of nothing or floating ash, nothing are grown dim, non-scale, be the aluminium true qualities, the condition of surface uniformity, aluminum substrate does not have corrosion of fish scale shape or excessive erosion, threaded hole does not have damage, interior and processing through hole (or threaded hole) the noresidue working fluid of die cavity.
Alkaline etching of the present invention adopts alkaline hot solution, with the aluminium surface following reaction takes place:
Al
2O
3+2NaOH→NaAlO
2+H
2O→Al
2O
3+H
2O
2Al+2NaOH+2?H
2O→NaAlO
2+3H
2↑
Generate Al
2O
3The diasporite fouling is on cell wall and heating tube, the aluminium surface is prone to defects such as hole line, spot, dark decorative pattern, grey color spot line in addition, for this reason, needs to add the agent of an amount of OBO-11 type alkaline etching, this alkaline etching agent have network and, inhibition, add lustre to, the leveling effect, solve above-mentioned defect.
Aluminium surface attachment one deck alkali lye and ash after alkaline etching, ash are alloying element and impurity such as the copper that can not be dissolved in basic solution, manganese, iron, silicon, make it to expose matrix surface so need remove with salpeter solution.
Embodiment
Embodiment 1
1, chemical degreasing: grease-removing agent OBO-10 type, content 50g/l, 45 ℃ of temperature, 20 minutes time, PH9;
2, Warm Wash: the clear water that flows, 40 ℃ of temperature, 1 minute time, PH8;
3, cold wash: the clear water that flows, room temperature, 1 minute time, PH7;
4, alkaline etching: sodium hydroxide 60g/l and alkaline etching agent OBO-11 type 10g/l mix, 65 ℃ of temperature, 4 minutes time;
5, Warm Wash: the clear water that flows, 45 ℃ of temperature, 1 minute time, PH8;
6, cold wash: the clear water that flows, room temperature, 1 minute time, PH7;
7, remove stain: use nitric acid 320g/l, room temperature, 1 minute time;
8, cold wash: the clear water that flows, room temperature, 1 minute time, PH5;
9, cold wash: the clear water that flows, room temperature, 1 minute time, PH6;
10, hot water scalds and does: the clear water that flows, 80 ℃ of temperature, 1 minute time, PH6.5.
Embodiment 2
1, chemical degreasing: grease-removing agent OBO-10 type, content 50g/l, 50 ℃ of temperature, 15 minutes time, PH10;
2, Warm Wash: the clear water that flows, 45 ℃ of temperature, 1 minute time, PH9;
3, cold wash: the clear water that flows, room temperature, 1 minute time, PH8;
4, alkaline etching: sodium hydroxide 70g/l and alkaline etching agent OBO-11 type 10g/l mix, 55 ℃ of temperature, 5 minutes time;
5, Warm Wash: the clear water that flows, 50 ℃ of temperature, 1 minute time, PH9;
6, cold wash: the clear water that flows, room temperature, 1 minute time, PH8;
7, remove stain: use nitric acid 380g/l, room temperature, 1 minute time;
8, cold wash: the clear water that flows, room temperature, 1 minute time, PH6;
9, cold wash: the clear water that flows, room temperature, 1 minute time, PH7;
10, hot water scalds and does: the clear water that flows, 90 ℃ of temperature, 1 minute time, PH7.
Claims (3)
1. an aluminum alloy sheet material surface is removed the purging method of grease and oxide skin, comprises that chemical degreasing, Warm Wash, cold wash and hot water scald to do, and it is characterized in that: increase alkaline etching → Warm Wash → except that four steps of stain → cold wash cold wash after.
2. aluminum alloy sheet material surface according to claim 1 is removed the purging method of grease and oxide skin, it is characterized in that: alkaline etching is raw materials used to be by sodium hydroxide and alkaline etching agent 6-7 by weight percentage: 1 mixes, temperature is 55-65 ℃, time 4-5 minute.
3. aluminum alloy sheet material surface according to claim 1 is removed the purging method of grease and oxide skin, it is characterized in that: remove stain and adopt salpeter solution, temperature is a room temperature, and content is 320-380g/l, time 1-3 minute.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910217785A CN101705494A (en) | 2009-10-30 | 2009-10-30 | Cleaning method for removing grease and scale formation from aluminum alloy sheet material surface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910217785A CN101705494A (en) | 2009-10-30 | 2009-10-30 | Cleaning method for removing grease and scale formation from aluminum alloy sheet material surface |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101705494A true CN101705494A (en) | 2010-05-12 |
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|---|---|---|---|
| CN200910217785A Pending CN101705494A (en) | 2009-10-30 | 2009-10-30 | Cleaning method for removing grease and scale formation from aluminum alloy sheet material surface |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102517597A (en) * | 2011-12-06 | 2012-06-27 | 中国科学院金属研究所 | Aluminum alloy silicon-free efficient degreasing fluid and preparation method thereof |
| CN102965709A (en) * | 2012-10-18 | 2013-03-13 | 北京航空航天大学 | Environmental long-term pre-treatment process for surface anodization of aluminum alloy |
| CN103506267A (en) * | 2013-09-22 | 2014-01-15 | 芜湖宝德轮业有限公司 | Nanometer treatment technology of surface of aluminum alloy hub |
| CN104195582A (en) * | 2014-09-09 | 2014-12-10 | 青岛润鑫伟业科贸有限公司 | Cleaning method of industrial pure aluminum |
| CN109655381A (en) * | 2019-01-04 | 2019-04-19 | 江苏理工学院 | A kind of measurement method of high temperature aluminum/aluminium alloy drop angle of wetting |
-
2009
- 2009-10-30 CN CN200910217785A patent/CN101705494A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102517597A (en) * | 2011-12-06 | 2012-06-27 | 中国科学院金属研究所 | Aluminum alloy silicon-free efficient degreasing fluid and preparation method thereof |
| CN102517597B (en) * | 2011-12-06 | 2013-05-29 | 中国科学院金属研究所 | Aluminum alloy silicon-free efficient degreasing fluid and preparation method thereof |
| CN102965709A (en) * | 2012-10-18 | 2013-03-13 | 北京航空航天大学 | Environmental long-term pre-treatment process for surface anodization of aluminum alloy |
| CN102965709B (en) * | 2012-10-18 | 2015-08-19 | 北京航空航天大学 | A kind of for the anodised environment-friendly long-life pre-treating technology of aluminum alloy surface |
| CN103506267A (en) * | 2013-09-22 | 2014-01-15 | 芜湖宝德轮业有限公司 | Nanometer treatment technology of surface of aluminum alloy hub |
| CN103506267B (en) * | 2013-09-22 | 2015-01-21 | 芜湖宝德轮业有限公司 | Nanometer treatment technology of surface of aluminum alloy hub |
| CN104195582A (en) * | 2014-09-09 | 2014-12-10 | 青岛润鑫伟业科贸有限公司 | Cleaning method of industrial pure aluminum |
| CN109655381A (en) * | 2019-01-04 | 2019-04-19 | 江苏理工学院 | A kind of measurement method of high temperature aluminum/aluminium alloy drop angle of wetting |
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Open date: 20100512 |