CN104611688B - Aluminum passivator and preparation method thereof - Google Patents
Aluminum passivator and preparation method thereof Download PDFInfo
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- CN104611688B CN104611688B CN201510036238.4A CN201510036238A CN104611688B CN 104611688 B CN104611688 B CN 104611688B CN 201510036238 A CN201510036238 A CN 201510036238A CN 104611688 B CN104611688 B CN 104611688B
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- parts
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- aluminum
- ludox
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Classifications
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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
- C23C22/34—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 fluorides or complex fluorides
-
- 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
- C23C22/68—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 solutions with pH between 6 and 8
Abstract
The invention discloses an aluminum passivator which is prepared from the following raw materials in parts by weight: 5-8 parts of silica sol, 1-3 parts of citric acid, 1-3 parts of glacial acetic acid, 2-5 parts of hexafluorotitanic acid, 3-5 parts of hexafluorozirconic acid, 2 parts of L-tartaric acid, 4-5 parts of ammonia water and 69-82 parts of water. The invention aims at providing a preparation method which is good in effect and free of pollution, for the aluminum passivator.
Description
Technical field
The present invention relates to a kind of preparation method of the conventional article of metallurgy industry, more specifically, it relates to a kind of aluminum is blunt
Agent and preparation method thereof.
Background technology
Aluminum passivation agent is Aluminum passivator, aluminum polishing agent, be various aluminum products and aluminum alloy surface special environmental protection passivation
It is adaptable to aluminum and aluminum alloy surface form chemical passivation film, the chemical passivation film obtained by processing through aluminum passivation agent has pole for agent
Good Corrosion Protection, can be used as paint, plastics, the pre-treatment decorated.
Aluminum products are applied more and more extensively in daily life and industrial and agricultural production, because metallic aluminium is more active, if
These aluminum products are placed directly within air, are then easy for oxidized, so the surface treatment of aluminum products is particularly important.In aluminum
And the surface treatment last layer chemical passivation coating of alloy（Aluminum passivation agent）, it is that anti-corrosion and decoration is had laid a good foundation.
At present, market is used for the inorganic agent of die casting aluminium surface substantially with trivalent chromium, Cr VI or rare earth modified knot
Close strong oxidizer and the conversion film treating agent that forms, the above two generally existing problem of environmental pollutions, although the latter's environmental pollution
Improve to some extent, but problem thoroughly can not be solved, occur in the items of the conversion film of die casting aluminium surface formation simultaneously again
Index can decline or not reach the requirement of practical application；Die casting aluminium surface discolouration, dust, the binding ability after application decline；
Decay resistance declines or does not pass a test.So developing a kind of pollution-free and function admirable passivator is that current urgent need solves
Problem.
Content of the invention
In view of the shortcomings of the prior art, it is an object of the invention to provide a kind of effect is good, free of contamination aluminum passivation
Agent and preparation method thereof.
For achieving the above object, the invention provides following technical scheme：A kind of aluminum passivation agent, is characterized in that：It by under
State raw material to form than mixing according to weight, respectively：
5～8 parts of Ludox
1～3 part of citric acid
1～3 part of glacial acetic acid
2～5 parts of fluotitanic acid
3～5 parts of fluorine zirconic acid
2 parts of L-TARTARIC ACID
4～5 parts of ammonia
69～82 parts of water.
Present invention also offers the preparation method of this aluminum passivation agent：
S1：Take 5～8 parts of Ludox to add in 69～82 parts of water, be used as the film forming skeleton of passivator；
1～3 part of flexible food acids mix homogeneously is added to S1, in order to adjust pH value to 3～5 in the solution being obtained again；
In the solution being obtained to S2 again, the interior chelating agent adding 2～5 parts, uniformly mixes at a temperature of 40 DEG C～60 DEG C；
S4：4～5 parts of ammonia is added, in order to adjust pH value to 5～8 in the solution that the most backward S3 is obtained.
The present invention is further arranged to：The fluorine zirconic acid having for catalysis, described fluorine is added in the solution being obtained also in S4
The quality that zirconic acid adds is 3～5 parts.
The present invention is further arranged to：Adding in the solution being obtained also in S4 has for making the more homogeneous L- wine of coating
Stone acid, the quality of described L-TARTARIC ACID is 2 parts.
The present invention is further arranged to：Described flexibility food acids are citric acid and glacial acetic acid, respectively 1～2 part, 2 parts～3
Part.
The present invention is further arranged to：Described chelating agent is fluotitanic acid, and described fluotitanic acid quality is 2～5 parts.
By adopting technique scheme, using Ludox as main film forming skeleton, because element silicon is homeostatic
Chemical property, will not change its own performance because of extraneous environmental factorss.As film forming skeleton, last aluminum can be allowed
The oxide-film that surface is formed is more firm, more stable.The effect of flexible food acids, adjust passivator pH value so as to
During preparation, it is at carrying out under optimal acid-base condition.The interpolation of chelating agent enables to passivator right
When aluminum products surface is passivated, can be more prone to makes metal ion and ions binding.And 40 DEG C～60 DEG C this
At a temperature of, a mixed uniformly effect well can be played.L-TARTARIC ACID is a kind of carboxylic acid, can control the formation of silver mirror
Speed, obtains very uniform coating, is added in order to make passivating film more uniformly be covered in aluminum products
Surface.Last step adds ammonia to the inside of it, and the interpolation of ammonia enables to the passivator holding one of last molding
Normal pH value, will not make pH value too high or too low, thus affecting the effect of passivator.The passivation of present invention preparation used
Agent, does not contain heavy metal chromium, for comparing the passivator crying out chromium, more environmental protection, and effect is more good.
Specific embodiment
In the following embodiments, the mass percent said is each composition and accounts for the mass percent in total solution.
Embodiment one：
A kind of preparation method of passivator, including following step：
S1：Xiang Shuizhong adds the Ludox being used as film forming skeleton, 5 parts of Ludox.In the present embodiment, Ludox passes through
Silane hydrolyzate method obtains, and adds silane, produce Ludox by the hydrolysis of silane in water.
S2：It is additionally added the fluorine zirconic acid for catalysis, the amount that described fluorine zirconic acid adds is 3 parts.Here fluorine zirconic acid, is used for
The hydrolysis of catalysis silane, can allow it more quickly form Ludox skeleton.Here fluorine zirconic acid is only a kind of excellent
The embodiment of choosing, because its catalytic effect is outstanding.Can also for other some can be catalyzed the chemistry of silane hydrolysis reaction
Product.
S3：The flexible food acids that mass percent is 1～3 part are added to mix to it again, in order to adjust pH value to 3.At this
In embodiment, flexible food acids are the glacial acetic acid of 1 part of citric acid and 2 parts.
S4：It is additionally added for making the more homogeneous L-TARTARIC ACID of coating, the amount that described L-TARTARIC ACID adds is 2 parts.
S5：Add 2 parts of chelating agent again into it, uniformly mix at a temperature of 40 DEG C.In the present invention, the complexation of interpolation
Agent is fluotitanic acid, because it can produce complex reaction when aluminium surface is passivated, and excellent.
S6：Its internal ammonia adding 4 parts the most backward, in order to adjust pH value, by pH value regulated value 5.
Embodiment two：
A kind of preparation method of passivator, including following step：
S1：Xiang Shuizhong adds the Ludox being used as film forming skeleton, 8 parts of Ludox.In the present embodiment, Ludox passes through
Silane hydrolyzate method obtains, and adds silane, produce Ludox by the hydrolysis of silane in water.
S2：It is additionally added the fluorine zirconic acid for catalysis, the amount that described fluorine zirconic acid adds is 5 parts.Here fluorine zirconic acid, is used for
The hydrolysis of catalysis silane, can allow it more quickly form Ludox skeleton.Here fluorine zirconic acid is only a kind of excellent
The embodiment of choosing, because its catalytic effect is outstanding.Can also for other some can be catalyzed the chemistry of silane hydrolysis reaction
Product.
S3：The flexible food acids that mass percent is 1～3 part are added to mix to it again, in order to adjust pH value to 3.At this
In embodiment, flexible food acids are the glacial acetic acid of 2 parts of citric acid and 3 parts.
S4：It is additionally added for making the more homogeneous L-TARTARIC ACID of coating, the amount that described L-TARTARIC ACID adds is 2 parts.
S5：Add 5 parts of chelating agent again into it, uniformly mix at a temperature of 40 DEG C.In the present invention, the complexation of interpolation
Agent is fluotitanic acid, because it can produce complex reaction when aluminium surface is passivated, and excellent.
S6：Its internal ammonia adding 5 parts the most backward, in order to adjust pH value, by pH value regulated value 8.
Embodiment three：
A kind of preparation method of passivator, including following step：
S1：Xiang Shuizhong adds the Ludox being used as film forming skeleton, 6 parts of Ludox.In the present embodiment, Ludox passes through
Silane hydrolyzate method obtains, and adds silane, produce Ludox by the hydrolysis of silane in water.
S2：It is additionally added the fluorine zirconic acid for catalysis, the amount that described fluorine zirconic acid adds is 4 parts.Here fluorine zirconic acid, is used for
The hydrolysis of catalysis silane, can allow it more quickly form Ludox skeleton.Here fluorine zirconic acid is only a kind of excellent
The embodiment of choosing, because its catalytic effect is outstanding.Can also for other some can be catalyzed the chemistry of silane hydrolysis reaction
Product.
S3：The flexible food acids that mass percent is 1～3 part are added to mix to it again, in order to adjust pH value to 3.At this
In embodiment, flexible food acids are the glacial acetic acid of 2 parts of citric acid and 1 part.
S4：It is additionally added for making the more homogeneous L-TARTARIC ACID of coating, the amount that described L-TARTARIC ACID adds is 2 parts.
S5：Add 2 parts of chelating agent again into it, uniformly mix at a temperature of 40 DEG C.In the present invention, the complexation of interpolation
Agent is fluotitanic acid, because it can produce complex reaction when aluminium surface is passivated, and excellent.
S6：Its internal ammonia adding 4 parts the most backward, in order to adjust pH value, by pH value regulated value 6.
Example IV：
A kind of preparation method of passivator, including following step：
S1：Xiang Shuizhong adds the Ludox being used as film forming skeleton, 7 parts of Ludox.In the present embodiment, Ludox passes through
Silane hydrolyzate method obtains, and adds silane, produce Ludox by the hydrolysis of silane in water.
S2：It is additionally added the fluorine zirconic acid for catalysis, the amount that described fluorine zirconic acid adds is 5 parts.Here fluorine zirconic acid, is used for
The hydrolysis of catalysis silane, can allow it more quickly form Ludox skeleton.Here fluorine zirconic acid is only a kind of excellent
The embodiment of choosing, because its catalytic effect is outstanding.Can also for other some can be catalyzed the chemistry of silane hydrolysis reaction
Product.
S3：The flexible food acids that mass percent is 1～3 part are added to mix to it again, in order to adjust pH value to 3.At this
In embodiment, flexible food acids are the glacial acetic acid of 3 parts of citric acid and 2 parts.
S4：It is additionally added for making the more homogeneous L-TARTARIC ACID of coating, the amount that described L-TARTARIC ACID adds is 2 parts.
S5：Add 2 parts of chelating agent again into it, uniformly mix at a temperature of 40 DEG C.In the present invention, the complexation of interpolation
Agent is fluotitanic acid, because it can produce complex reaction when aluminium surface is passivated, and excellent.
S6：Its internal ammonia adding 4 parts the most backward, in order to adjust pH value, by pH value regulated value 7.
The above is the preferred embodiment of the present invention, to those skilled in the art without departing from the present invention
On the premise of principle, some modifications and improvement can also be made, these also should be regarded as protection scope of the present invention.
Claims (6)
1. a kind of aluminum passivation agent, is characterized in that：It is made up of than mixing according to weight following raw materials, respectively：
5～8 parts of Ludox
1～3 part of citric acid
1～3 part of glacial acetic acid
2～5 parts of fluotitanic acid
3～5 parts of fluorine zirconic acid
2 parts of L-TARTARIC ACID
4～5 parts of ammonia
69～82 parts of water.
2. a kind of preparation method of aluminum passivation agent, is characterized in that：
S1：Take 5～8 parts of Ludox to add in 69～82 parts of water, be used as the film forming skeleton of passivator；
S2：1～3 part of flexible food acids mix homogeneously is added to S1, in order to adjust pH value to 3～5 in the solution being obtained again；
S3：In the solution being obtained to S2 again, the interior chelating agent adding 2～5 parts, uniformly mixes at a temperature of 40 DEG C～60 DEG C；
S4：4～5 parts of ammonia is added, in order to adjust pH value to 5～8 in the solution that the most backward S3 is obtained.
3. the preparation method of aluminum passivation agent according to claim 2, is characterized in that：Add in the solution being obtained also in S4
There is the fluorine zirconic acid for catalysis, the quality that described fluorine zirconic acid adds is 3～5 parts.
4. the preparation method of aluminum passivation agent according to claim 2, is characterized in that：Add in the solution being obtained also in S4
Have for making the more homogeneous L-TARTARIC ACID of coating, the quality of described L-TARTARIC ACID is 2 parts.
5. the preparation method of aluminum passivation agent according to claim 2, is characterized in that：Described flexibility food acids be citric acid and
Glacial acetic acid, respectively 1～2 part, 2 parts～3 parts.
6. the preparation method of aluminum passivation agent according to claim 2, is characterized in that：Described chelating agent is fluotitanic acid, described
Fluotitanic acid quality is 2～5 parts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510036238.4A CN104611688B (en) | 2015-01-26 | 2015-01-26 | Aluminum passivator and preparation method thereof |
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| WO2018218427A1 (en) * | 2017-05-27 | 2018-12-06 | 深圳市恒兆智科技有限公司 | Chromium-free filming agent, metal component, and surface filming treatment method therefor |
| CN107447210A (en) * | 2017-06-13 | 2017-12-08 | 泾县信达工贸有限公司 | A kind of process of surface treatment of electric rice cooker heated disk |
| CN111074255A (en) * | 2019-12-05 | 2020-04-28 | 刘广付 | Metal surface pretreatment agent and preparation method and application thereof |
| CN114657493B (en) * | 2022-05-05 | 2024-02-13 | 河北华熙管业有限公司 | Corrosion-resistant galvanized steel pipe and production method thereof |
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| CN104264144A (en) * | 2014-10-31 | 2015-01-07 | 湖州织里天荣铝材添加剂厂 | Aluminum alloy product chemical conversion treatment process and nonferrous chromium-free film-forming agent |
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