CN113235077A - Aluminum alloy vanadium-titanium-europium passivation solution and preparation and use method thereof - Google Patents
Aluminum alloy vanadium-titanium-europium passivation solution and preparation and use method thereof Download PDFInfo
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- CN113235077A CN113235077A CN202110510603.6A CN202110510603A CN113235077A CN 113235077 A CN113235077 A CN 113235077A CN 202110510603 A CN202110510603 A CN 202110510603A CN 113235077 A CN113235077 A CN 113235077A
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- passivation
- europium
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- aluminum alloy
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
- C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
- C23C22/40—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing molybdates, tungstates or vanadates
- C23C22/44—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing molybdates, tungstates or vanadates containing also fluorides or complex fluorides
Abstract
The invention discloses an aluminum alloy vanadium-titanium-europium passivation solution and a preparation method and a use method thereof, wherein the passivation solution comprises the following components: film forming carrier, film forming promoter and antiseptic intensifier; the film forming carrier is used for forming a passivation film; the film forming accelerant is used for providing a titanium element and a vanadium element in the passivation film; the titanium element and the vanadium element are used for reducing the operation temperature and the passivation time for forming the passivation film and adjusting the layer color of the passivation film; the corrosion prevention reinforcing agent is used for providing europium element in the passivation film; the europium element is used for prolonging the salt spray resistance time of the passivation film; solves the problems of high operation temperature, long passivation time and short salt spray resistance time of a passivation film of the prior passivation solution.
Description
Technical Field
The invention relates to the field of metal surface treating agents, in particular to passivation solution used in an aluminum alloy passivation process.
Background
The passivating solution is a solution capable of making the surface of metal be passive, and is generally used for the post-plating treatment of zinc plating, cadmium plating and other plating layers, and aims to form a surface layer capable of preventing the normal reaction of metal on the surface of the plating layer, improve the corrosion resistance of the plating layer and increase the product appearance. The method is widely applied to a plurality of fields such as shipbuilding industry, mechanical industry, aviation, construction and the like.
The passivation solution used in the aluminum alloy passivation process in China is mainly chromate passivation, and has the defects that the operation temperature is 80-90 ℃, the passivation time is 10-20 minutes, the salt spray resistance of a passivation film is only 200 hours, and the like.
Disclosure of Invention
In view of the above, the invention provides an aluminum alloy vanadium-titanium-europium passivation solution, which solves the problems of high operation temperature, long passivation time and short salt spray resistance time of a passivation film of the conventional passivation solution.
In addition, the invention also provides a preparation method and a use method of the aluminum alloy vanadium-titanium-europium passivation solution.
In a first aspect, the aluminum alloy vanadium titanium europium passivation solution is characterized by comprising:
film forming carrier, film forming promoter and antiseptic intensifier;
the film forming carrier is used for forming a passivation film;
the film forming accelerant is used for providing a titanium element and a vanadium element in the passivation film;
the titanium element and the vanadium element are used for reducing the operation temperature and the passivation time for forming the passivation film and adjusting the layer color of the passivation film;
the corrosion prevention reinforcing agent is used for providing europium element in the passivation film;
the europium element is used for prolonging the salt spray resistant time of the passivation film.
Further, the film-forming accelerator includes: sodium fluorotitanate and vanadium pentoxide.
Further, the corrosion protection enhancer is europium chloride and/or sodium molybdate.
Further, the europium chloride is europium chloride hexahydrate;
and/or the presence of a gas in the interior of the container,
the film-forming carrier is an aqueous epoxy ester resin dispersion.
Further, the film-forming carrier contains sulfuric acid;
the sulfuric acid is used for providing H + ions to dissolve the aluminum alloy;
and/or the presence of a gas in the interior of the container,
the film-forming carrier contains a complexing agent;
the complexing agent is used for controlling the film forming speed of the passivation film and the stability of passivation solution;
further, the film forming accelerant also comprises sodium fluoride,
the sodium fluoride is used for accelerating the forming speed of the passivation film;
and/or the presence of a gas in the interior of the container,
the film forming promoter also comprises cobalt sulfate;
the cobalt sulfate is used for adjusting the layer color of the passivation film.
Further, the complexing agent is citric acid;
and/or the presence of a gas in the interior of the container,
the cobalt sulfate is cobalt sulfate monohydrate;
and/or the presence of a gas in the interior of the container,
the film forming promoter also comprises organic bentonite;
the organic bentonite is used for adjusting the viscosity of the passivation solution;
and/or the presence of a gas in the interior of the container,
the film-forming carrier is dissolved in water.
Further, according to the mass percentage, the aqueous epoxy ester resin dispersion is 8-12%, the cobalt sulfate monohydrate is 1-5%, the sodium fluoride is 2-6%, the sodium molybdate is 3-6%, the sulfuric acid is 3-5%, the citric acid is 2-3%, the sodium fluotitanate is 1-3%, the europium chloride hexahydrate is 5-9%, the vanadium pentoxide is 5-8%, the organic bentonite is 0.1-0.5%, and the balance is water.
In a second aspect, the preparation method of the aluminum alloy vanadium-titanium-europium passivation solution is characterized by comprising the following steps:
the aluminum alloy vanadium-titanium-europium passivation solution of the first aspect;
adding the aqueous epoxy ester resin dispersion to sulfuric acid diluted with the water to obtain a first mixed solution;
adding the cobalt sulfate monohydrate, the sodium molybdate, the sodium fluotitanate, the europium chloride hexahydrate and the vanadium pentoxide into the first mixed solution to obtain a second mixed solution;
adding the sodium fluoride and the citric acid into the second mixed solution to obtain a third mixed solution;
and adding the organic bentonite and the residual water into the third mixed solution to obtain the aluminum alloy vanadium-titanium-europium passivation solution.
In a third aspect, the use method of the aluminum alloy vanadium-titanium-europium passivation solution is characterized by comprising the following steps:
purifying the aluminum alloy workpiece to be passivated;
diluting the aluminum alloy vanadium-titanium-europium passivation solution by 20-30 times with water to obtain passivation working solution;
keeping the pH value of the passivation working solution at 2.0-3.0, and passivating the aluminum alloy workpiece at the temperature of 40-45 ℃ for 30-50 seconds to obtain a passivation film;
and drying the passivated aluminum alloy workpiece by using wind at the temperature of 50-60 ℃.
The invention has the following beneficial effects:
the aluminum alloy vanadium-titanium-europium passivation solution can be stably operated at 40-45 ℃, so that energy consumption is saved; the passivation time is 30-50 seconds, the passivation film forming speed is high, the passivation time is short, and the construction is easy; the salt spray resistance of the formed passivation film can reach 500-720 hours, the salt spray resistance is excellent, and the corrosion resistance of the passivation film is good; solves the problems of high operation temperature, long passivation time and short salt spray resistance time of a passivation film of the prior passivation solution.
Detailed Description
The present invention will be described below based on examples, but it should be noted that the present invention is not limited to these examples. In the following detailed description of the present invention, certain specific details are set forth. However, the present invention may be fully understood by those skilled in the art for those parts not described in detail.
Also, unless the context clearly requires otherwise, throughout the description and the claims, the words "comprise", "comprising", and the like are to be construed in an inclusive sense as opposed to an exclusive or exhaustive sense; that is, the meaning of "includes but is not limited to".
The passivation solution used in the following examples of the application comprises the following components in percentage by mass:
1. 8-12% of aqueous epoxy ester resin dispersion WX-K2100-40 (New materials science and technology Co., Ltd., Bay of Fushan city);
2. 1-5% of cobalt sulfate monohydrate (Baodingfuximab new material Co., Ltd.);
3. 2-6% of sodium fluoride (Xinbo chemical Co., Ltd., L.Turcz);
4. 3-6% of sodium molybdate (Wuhankenneng chemical Co., Ltd.);
5. 3-5% of sulfuric acid (Zhengzhou Longda chemical products Co., Ltd.);
6. 2-3% of citric acid (Shandong Nature biology group Co., Ltd.);
7. 1-3% of sodium fluotitanate (Baodingfuximab new material Co., Ltd.);
8. europium chloride hexahydrate (EuCl)3·6H2O) (Shanghai sensitive Biotech Co., Ltd.) 5-9%;
9. vanadium pentoxide (V)2O5) (Hubei Xinyin Co., Ltd.) 5-8%;
10. 0.1-0.5% of organic bentonite (Guangzhou Xinghangshi chemical science and technology limited).
The application of each component in the aluminum alloy vanadium-titanium-europium passivation solution provided by the embodiment of the application is as follows:
(1) aqueous epoxy ester resin dispersion: as a basic carrier of the passivation film;
(2) sulfuric acid: providing H + ions to dissolve the surface layer of the aluminum alloy to be passivated;
(3) citric acid: as a complexing agent, the complexing agent can control the film forming speed of a passivation film and the stability of passivation working solution;
(4) cobalt sulfate monohydrate, sodium fluorotitanate, vanadium pentoxide: all are film forming promoters and can adjust the color of the passivation film layer;
(5) sodium fluoride: as a film forming accelerator for accelerating the formation of the passivation film;
(6) organic bentonite: adjusting the viscosity of the passivation solution;
(7) sodium molybdate, europium chloride hexahydrate (EuCl)3·6H2O): a preservative enhancer.
The core raw material of the invention is sodium fluotitanate (Na)2TiF6) Vanadium pentoxide (V)2O5) Europium chloride hexahydrate (EuCl)3·6H2O)。
Example one
8% of aqueous epoxy ester resin dispersion, 4% of cobalt sulfate monohydrate, 3% of sodium fluoride, 6% of sodium molybdate, 5% of sulfuric acid, 2% of citric acid, 1% of sodium fluotitanate and europium chloride hexahydrate (EuCl)3·6H2O)5%, vanadium pentoxide (V)2O5)5 percent of organic bentonite, 0.15 percent of organic bentonite and the balance of water.
The passivation solution of the embodiment is operated at 40-45 ℃ for 50 seconds, and the salt mist resistance of the obtained passivation film reaches 500 hours.
Example two:
10% of aqueous epoxy ester resin dispersion, 2% of cobalt sulfate monohydrate, 6% of sodium fluoride, 4% of sodium molybdate, 5% of sulfuric acid, 3% of citric acid, 3% of sodium fluotitanate and europium chloride hexahydrate (EuCl)3·6H2O)6%, vanadium pentoxide (V)2O5)6 percent of organic bentonite, 0.2 percent of organic bentonite and the balance of water.
The passivation solution of the embodiment is operated at 40-45 ℃, the passivation time is 40 seconds, and the salt mist resistance of the obtained passivation film is 600 hours.
EXAMPLE III
12% of aqueous epoxy ester resin dispersion, 3% of cobalt sulfate monohydrate, 4% of sodium fluoride, 5% of sodium molybdate, 4% of sulfuric acid, 3% of citric acid, 3% of sodium fluotitanate and europium chloride hexahydrate (EuCl)3·6H2O)9%, vanadium pentoxide (V)2O5)8 percent of organic bentonite, 0.2 percent of organic bentonite and the balance of water.
The passivation solution of the embodiment is operated at 40-45 ℃ for 30 seconds, and the salt mist resistance of the obtained passivation film reaches 720 hours.
The above-mentioned embodiments are merely embodiments for expressing the invention, and the description is specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for those skilled in the art, various changes, substitutions of equivalents, improvements and the like can be made without departing from the spirit of the invention, and these are all within the scope of the invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. The aluminum alloy vanadium-titanium-europium passivation solution is characterized by comprising the following components:
film forming carrier, film forming promoter and antiseptic intensifier;
the film forming carrier is used for forming a passivation film;
the film forming accelerant is used for providing a titanium element and a vanadium element in the passivation film;
the titanium element and the vanadium element are used for reducing the operation temperature and the passivation time for forming the passivation film and adjusting the layer color of the passivation film;
the corrosion prevention reinforcing agent is used for providing europium element in the passivation film;
the europium element is used for prolonging the salt spray resistant time of the passivation film.
2. The aluminum alloy vanadium-titanium-europium passivation solution as claimed in claim 1, wherein:
sodium fluorotitanate and vanadium pentoxide.
3. The aluminum alloy vanadium titanium europium passivation solution of claim 2, wherein the film forming promoter comprises:
the corrosion protection enhancer is europium chloride and/or sodium molybdate.
4. The aluminum alloy vanadium titanium europium passivation solution of any one of claims 1 to 3, characterized in that:
the europium chloride is europium chloride hexahydrate;
and/or the presence of a gas in the interior of the container,
the film-forming carrier is an aqueous epoxy ester resin dispersion.
5. The aluminum alloy vanadium-titanium-europium passivation solution as claimed in claim 4, wherein:
the film-forming carrier contains sulfuric acid;
the sulfuric acid is used for providing H + ions to dissolve the aluminum alloy;
and/or the presence of a gas in the interior of the container,
the film-forming carrier contains a complexing agent;
and the complexing agent is used for controlling the film forming speed of the passivation film and the stability of the passivation solution.
6. The aluminum alloy vanadium-titanium-europium passivation solution as claimed in claim 5, wherein:
the film-forming promoter also comprises sodium fluoride,
the sodium fluoride is used for accelerating the forming speed of the passivation film;
and/or the presence of a gas in the interior of the container,
the film forming promoter also comprises cobalt sulfate;
the cobalt sulfate is used for adjusting the layer color of the passivation film.
7. The aluminum alloy vanadium-titanium-europium passivation solution as claimed in claim 6, wherein:
the complexing agent is citric acid;
and/or the presence of a gas in the interior of the container,
the cobalt sulfate is cobalt sulfate monohydrate;
and/or the presence of a gas in the interior of the container,
the film forming promoter also comprises organic bentonite;
the organic bentonite is used for adjusting the viscosity of the passivation solution;
and/or the presence of a gas in the interior of the container,
the film-forming carrier is dissolved in water.
8. The aluminum alloy vanadium titanium europium passivation solution of claim 7, characterized in that:
according to the mass percentage, the water-based epoxy ester resin dispersoid comprises, by mass, 8-12% of the water-based epoxy ester resin dispersoid, 1-5% of the cobalt sulfate monohydrate, 2-6% of the sodium fluoride, 3-6% of the sodium molybdate, 3-5% of the sulfuric acid, 2-3% of the citric acid, 1-3% of the sodium fluotitanate, 5-9% of the europium chloride hexahydrate, 5-8% of the vanadium pentoxide, 0.1-0.5% of the organobentonite and the balance of the water.
9. A preparation method of an aluminum alloy vanadium-titanium-europium passivation solution is characterized by comprising the following steps:
the aluminum alloy vanadium titanium europium passivation solution of claim 7;
adding the aqueous epoxy ester resin dispersion to sulfuric acid diluted with the water to obtain a first mixed solution;
adding the cobalt sulfate monohydrate, the sodium molybdate, the sodium fluotitanate, the europium chloride hexahydrate and the vanadium pentoxide into the first mixed solution to obtain a second mixed solution;
adding the sodium fluoride and the citric acid into the second mixed solution to obtain a third mixed solution;
and adding the organic bentonite and the residual water into the third mixed solution to obtain the aluminum alloy vanadium-titanium-europium passivation solution.
10. The use method of the aluminum alloy vanadium-titanium-europium passivation solution is characterized by comprising the following steps of:
purifying the aluminum alloy workpiece to be passivated;
diluting the aluminum alloy vanadium-titanium-europium passivation solution by 20-30 times with water to obtain passivation working solution;
keeping the pH value of the passivation working solution at 2.0-3.0, and passivating the aluminum alloy workpiece at the temperature of 40-45 ℃ for 30-50 seconds to obtain a passivation film;
and drying the passivated aluminum alloy workpiece by using wind at the temperature of 50-60 ℃.
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007162098A (en) * | 2005-12-15 | 2007-06-28 | Nippon Parkerizing Co Ltd | Metal surface-treating aqueous agent, surface treatment method and surface treated metallic material |
| CN101153392A (en) * | 2006-09-28 | 2008-04-02 | 比亚迪股份有限公司 | Composition for surface treatment of light metal and its composite material |
| CN102115880A (en) * | 2009-12-31 | 2011-07-06 | 汉高股份有限及两合公司 | Surface treatment compound and solution of light metal or light metal alloy and surface treatment method |
| CN103276385A (en) * | 2013-05-17 | 2013-09-04 | 华南理工大学 | Method for preparing high-corrosion-resistance colored passivating film on surface of aluminum alloy |
| CN104561970A (en) * | 2014-12-31 | 2015-04-29 | 苏州禾川化学技术服务有限公司 | Corrosion-resistant magnesium aluminum alloy chromium-free passivation solution |
| CN106756939A (en) * | 2016-04-16 | 2017-05-31 | 佛山瑞箭体育器材有限公司 | aluminum passivation liquid and preparation method thereof |
| CN108034935A (en) * | 2017-12-12 | 2018-05-15 | 广州旭淼新材料科技有限公司 | A kind of chromiumfree conversion is into film liquid and preparation method thereof |
| CN108220940A (en) * | 2017-12-28 | 2018-06-29 | 北京钢研新冶工程设计有限公司 | A kind of normal temperature environment friendly aluminium alloy passivating solution, preparation method and application method |
| CN109321906A (en) * | 2018-12-05 | 2019-02-12 | 湖南恒佳新材料科技有限公司 | A kind of anticorrosion aluminium material and preparation method thereof |
-
2021
- 2021-05-11 CN CN202110510603.6A patent/CN113235077A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007162098A (en) * | 2005-12-15 | 2007-06-28 | Nippon Parkerizing Co Ltd | Metal surface-treating aqueous agent, surface treatment method and surface treated metallic material |
| CN101153392A (en) * | 2006-09-28 | 2008-04-02 | 比亚迪股份有限公司 | Composition for surface treatment of light metal and its composite material |
| CN102115880A (en) * | 2009-12-31 | 2011-07-06 | 汉高股份有限及两合公司 | Surface treatment compound and solution of light metal or light metal alloy and surface treatment method |
| CN103276385A (en) * | 2013-05-17 | 2013-09-04 | 华南理工大学 | Method for preparing high-corrosion-resistance colored passivating film on surface of aluminum alloy |
| CN104561970A (en) * | 2014-12-31 | 2015-04-29 | 苏州禾川化学技术服务有限公司 | Corrosion-resistant magnesium aluminum alloy chromium-free passivation solution |
| CN106756939A (en) * | 2016-04-16 | 2017-05-31 | 佛山瑞箭体育器材有限公司 | aluminum passivation liquid and preparation method thereof |
| CN108034935A (en) * | 2017-12-12 | 2018-05-15 | 广州旭淼新材料科技有限公司 | A kind of chromiumfree conversion is into film liquid and preparation method thereof |
| CN108220940A (en) * | 2017-12-28 | 2018-06-29 | 北京钢研新冶工程设计有限公司 | A kind of normal temperature environment friendly aluminium alloy passivating solution, preparation method and application method |
| CN109321906A (en) * | 2018-12-05 | 2019-02-12 | 湖南恒佳新材料科技有限公司 | A kind of anticorrosion aluminium material and preparation method thereof |
Non-Patent Citations (3)
| Title |
|---|
| 刘程: "《表面活性剂性质理论与应用》", 30 June 2003 * |
| 潘复生: "《中国战略性新兴产业新材料新型合金材料镁合金》", 31 October 2017, 北京：中国铁道出版社 * |
| 王卓: "《材料科学与工程及金属材料工程专业实验教程》", 31 August 2013, 成都：西南交通大学出版社 * |
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Application publication date: 20210810 |