CN103938200A - Aluminum alloy surface treatment method - Google Patents
Aluminum alloy surface treatment method Download PDFInfo
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- CN103938200A CN103938200A CN201410074363.XA CN201410074363A CN103938200A CN 103938200 A CN103938200 A CN 103938200A CN 201410074363 A CN201410074363 A CN 201410074363A CN 103938200 A CN103938200 A CN 103938200A
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- aluminium alloy
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Abstract
The invention relates to an aluminum alloy surface treatment method. The method comprises the following steps: preparing a treatment liquid, wherein the treatment liquid contains ammonium fluosilicate and other aluminum-free fluorine compounds, enables a film to be formed on an aluminum alloy when the aluminum alloy is immersed in the treatment liquid, and further contains an aqueous solution of aluminum fluoride, aluminum hydroxide, aluminum silicate, magnesium aluminate metasilicate and aluminum powder; carrying out early stage pretreatment on the aluminum alloy to be treated; immersing the aluminum alloy to be treated in the treatment liquid; heating the treatment liquid through a water bath to 95DEG C, and maintaining the temperature of the treatment liquid unchanged.
Description
Technical field
The invention belongs to field of metal surface treatment, specifically refer to a kind of aluminium alloy surface treatment method.
Background technology
In order to prevent the corrosion of Al-alloy products, carrying out in production process, need to be to the processing of alloy product pellumina.Traditional pellumina processing is the method by alumilite process is formed aluminum oxide dura mater in acid bath on aluminium surface.But the method exists expensive shortcoming, slow because it needs power-supply unit and film to form speed.
Now there is technology to propose by being heated to the temperature of 70-100 DEG C by containing magnesium silicofluoride and the ammonium silicofluoride ground aqueous solution, and aluminium is immersed in this aqueous solution and formed the technology of film on aluminium surface.This technology does not provide energy to form pellumina from outside by chemical reaction, and this technology has realized simplified apparatus, reduces processing cost and forms the good film of sliding on aluminium surface.But the weak point that this technology exists is, building, the film thickness forming on initially treated aluminium surface after bathing is little, and along with the processing area of aluminium alloy increases, it is large that thickness becomes, and this causes the large problem of film thickness deviation between alloy product.
Summary of the invention
The object of this invention is to provide a kind of aluminum alloy surface treatment technology scheme, by the technical program, can prevent from building the film attenuation phenomenon occurring in the surface treatment of the aluminium carrying out immediately after bathing, thereby make the formed film consistency of thickness between aluminium product.
The present invention is achieved by the following technical solutions:
A kind of aluminium alloy surface treatment method, preparation treatment solution, described treatment solution comprises that aluminium alloy immersion is contained to ammonium silicofluoride not to be contained in the treatment solution of fluorine cpd of aluminium with other, to form film in the above, wherein treatment solution further contains the aqueous solution of aluminum fluoride, aluminium hydroxide, pure aluminium silicate, metasilicic acid magnesium aluminate and aluminium powder; The weight percent that described ammonium silicofluoride accounts for treatment solution is 6.5%; The weight percent that the described fluorine cpd that do not contain aluminium account for treatment solution is 10%; The weight percent that described aluminum fluoride, aluminium hydroxide, pure aluminium silicate, metasilicic acid magnesium aluminate and aluminium powder account for treatment solution is 2.5%;
Pending aluminium alloy is carried out to pre-treatment in early stage;
Pending aluminium alloy is immersed in aforementioned processing liquid 3 minutes; Described treatment solution is by heating in water bath to 95 DEG C, and maintains treatment solution homo(io)thermism.
The weight ratio of described aluminum fluoride, aluminium hydroxide, pure aluminium silicate, metasilicic acid magnesium aluminate and aluminium powder is 1: 1: 2: 2: 0.4.
The described fluorine cpd that do not contain aluminium are not at least one of magnesium silicofluoride, zine fluosilicate, potassium silicofluoride, Sodium Silicofluoride or manganese fluosilicate.
Described treatment solution comprises and contains at least one the aqueous solution of Repone K, Potassium Hydrogen Phthalate or potassium primary phosphate.
The pH value of described treatment solution is 2.5-3.0.
The invention has the beneficial effects as follows:
The phenomenon of the film attenuation occurring in the aluminium surface treatment that present method is carried out after can avoiding building and bathing immediately, thus make the formed film even thickness between aluminium product.In addition, because surface treatment method of the present invention does not need power-supply unit, therefore can simplified apparatus, therefore consider advantageous from the angle of cost.
Embodiment
Describe by the following examples technical scheme of the present invention in detail, should be understood that, following embodiment is only exemplary, only can be used for explaining and technical scheme of the present invention being described, and can not to be interpreted as is the restriction to technical solution of the present invention.
A kind of aluminium alloy surface treatment method, preparation treatment solution, described treatment solution comprises that aluminium alloy immersion is contained to ammonium silicofluoride not to be contained in the treatment solution of fluorine cpd of aluminium with other, to form film in the above, wherein treatment solution further contains the aqueous solution of aluminum fluoride, aluminium hydroxide, pure aluminium silicate, metasilicic acid magnesium aluminate and aluminium powder; The weight percent that described ammonium silicofluoride accounts for treatment solution is 6.5%; The weight percent that the described fluorine cpd that do not contain aluminium account for treatment solution is 10%; The weight percent that described aluminum fluoride, aluminium hydroxide, pure aluminium silicate, metasilicic acid magnesium aluminate and aluminium powder account for treatment solution is 2.5%;
Pending aluminium alloy is carried out to pre-treatment in early stage;
Pending aluminium alloy is immersed in aforementioned processing liquid 3 minutes; Described treatment solution is by heating in water bath to 95 DEG C, and maintains treatment solution homo(io)thermism.
The weight ratio of described aluminum fluoride, aluminium hydroxide, pure aluminium silicate, metasilicic acid magnesium aluminate and aluminium powder is 1: 1: 2: 2: 0.4.
The described fluorine cpd that do not contain aluminium are not at least one of magnesium silicofluoride, zine fluosilicate, potassium silicofluoride, Sodium Silicofluoride or manganese fluosilicate.
The pH value of described treatment solution is 2.5-3.0.
Described treatment solution comprises and contains at least one the aqueous solution of Repone K, Potassium Hydrogen Phthalate or potassium primary phosphate.Adding such potassium compound makes the minimizing of pH variation of the treatment solution that causes film thickness change become possibility.Repone K, Potassium Hydrogen Phthalate or potassium primary phosphate play the effect of sustained release dosage in this treatment solution.Repone K, Potassium Hydrogen Phthalate or the potassium primary phosphate weight percent in treatment solution is 5% with respect to water optimal selection.
Using method of the present invention is that processed aluminium alloy is immersed in aforementioned processing liquid.The temperature of the treatment solution of dipping aluminium alloy is conventionally within the scope of 70-100 DEG C.If the temperature for the treatment of solution, lower than 70 DEG C, can extend the treatment time.If the temperature for the treatment of solution is higher than 100 DEG C, the evaporation for the treatment of solution is increased to undesirable degree.As for the treatment time, by just enough material soaking approximately 2 minutes, because film formation reaction finishes in about approximately 1 minute.
In the situation that not deviating from the spirit and scope of the present invention, variations more of the present invention and amendment are apparent for those of ordinary skill in the art.Therefore, all should be in the protection domain of this patent.
Claims (5)
1. an aluminium alloy surface treatment method, it is characterized in that: preparation treatment solution, described treatment solution comprises that aluminium alloy immersion is contained to ammonium silicofluoride not to be contained in the treatment solution of fluorine cpd of aluminium with other, to form film in the above, wherein treatment solution further contains the aqueous solution of aluminum fluoride, aluminium hydroxide, pure aluminium silicate, metasilicic acid magnesium aluminate and aluminium powder; The weight percent that described ammonium silicofluoride accounts for treatment solution is 6.5%; The weight percent that the described fluorine cpd that do not contain aluminium account for treatment solution is 10%; The weight percent that described aluminum fluoride, aluminium hydroxide, pure aluminium silicate, metasilicic acid magnesium aluminate and aluminium powder account for treatment solution is 2.5%;
Pending aluminium alloy is carried out to pre-treatment in early stage;
Pending aluminium alloy is immersed in aforementioned processing liquid 3 minutes; Described treatment solution is by heating in water bath to 95 DEG C, and maintains treatment solution homo(io)thermism.
2. aluminium alloy surface treatment method according to claim 1, is characterized in that: the weight ratio of described aluminum fluoride, aluminium hydroxide, pure aluminium silicate, metasilicic acid magnesium aluminate and aluminium powder is 1: 1: 2: 2: 0.4.
3. aluminium alloy surface treatment method according to claim 1, is characterized in that: the described fluorine cpd that do not contain aluminium are not at least one of magnesium silicofluoride, zine fluosilicate, potassium silicofluoride, Sodium Silicofluoride or manganese fluosilicate.
4. aluminium alloy surface treatment method according to claim 1, is characterized in that: described treatment solution comprises and contains at least one the aqueous solution of Repone K, Potassium Hydrogen Phthalate or potassium primary phosphate.
5. aluminium alloy surface treatment method according to claim 1, is characterized in that: the pH value of described treatment solution is 2.5-3.0.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410074363.XA CN103938200A (en) | 2014-03-03 | 2014-03-03 | Aluminum alloy surface treatment method |
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| CN201410074363.XA CN103938200A (en) | 2014-03-03 | 2014-03-03 | Aluminum alloy surface treatment method |
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| CN103938200A true CN103938200A (en) | 2014-07-23 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017161581A1 (en) * | 2016-03-25 | 2017-09-28 | 深圳市恒兆智科技有限公司 | Matte surface agent for acid etching, aluminum material, and matte surface forming method therefor |
| CN107250433A (en) * | 2014-12-29 | 2017-10-13 | 深圳市恒兆智科技有限公司 | The film forming agent stretched for aluminium |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1219606A (en) * | 1997-10-31 | 1999-06-16 | 铃木株式会社 | Surface treatment method, sliding member and piston |
| CN1451784A (en) * | 2002-04-19 | 2003-10-29 | 铃木株式会社 | Method for surface treatment of aluminium or aluminium alloy and treatment liquid used therefor |
| JP4583408B2 (en) * | 2007-05-21 | 2010-11-17 | 株式会社サシュウ産業 | Surface treatment method of aluminum material |
| CN103374717A (en) * | 2013-06-28 | 2013-10-30 | 天长市京发铝业有限公司 | Chemical oxidation treatment solution of aluminum and aluminum alloy |
-
2014
- 2014-03-03 CN CN201410074363.XA patent/CN103938200A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1219606A (en) * | 1997-10-31 | 1999-06-16 | 铃木株式会社 | Surface treatment method, sliding member and piston |
| CN1451784A (en) * | 2002-04-19 | 2003-10-29 | 铃木株式会社 | Method for surface treatment of aluminium or aluminium alloy and treatment liquid used therefor |
| JP4583408B2 (en) * | 2007-05-21 | 2010-11-17 | 株式会社サシュウ産業 | Surface treatment method of aluminum material |
| CN103374717A (en) * | 2013-06-28 | 2013-10-30 | 天长市京发铝业有限公司 | Chemical oxidation treatment solution of aluminum and aluminum alloy |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107250433A (en) * | 2014-12-29 | 2017-10-13 | 深圳市恒兆智科技有限公司 | The film forming agent stretched for aluminium |
| CN107250433B (en) * | 2014-12-29 | 2020-04-24 | 深圳市恒兆智科技有限公司 | Film forming agent for aluminum material stretching |
| WO2017161581A1 (en) * | 2016-03-25 | 2017-09-28 | 深圳市恒兆智科技有限公司 | Matte surface agent for acid etching, aluminum material, and matte surface forming method therefor |
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Application publication date: 20140723 |