CN109536970A - A kind of aluminium and aluminum alloy surface pretreatment neutralizer and preparation method thereof - Google Patents
A kind of aluminium and aluminum alloy surface pretreatment neutralizer and preparation method thereof Download PDFInfo
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- CN109536970A CN109536970A CN201910049265.3A CN201910049265A CN109536970A CN 109536970 A CN109536970 A CN 109536970A CN 201910049265 A CN201910049265 A CN 201910049265A CN 109536970 A CN109536970 A CN 109536970A
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- aluminium
- neutralizer
- aluminum alloy
- deionized water
- alloy surface
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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
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
- C23G1/12—Light metals
- C23G1/125—Light metals aluminium
Abstract
The present invention relates to aluminium and aluminum alloy surface preconditioning technique field, more particularly to a kind of aluminium and aluminum alloy surface pre-process neutralizer, the composition and ratio range of the neutralizer are as follows: 185~215ml/l of sulfuric acid, 10~20g/l of potassium permanganate, 40~50ml/l of deashing agent and deionized water surplus, preparation method include that PVC slot is added in required volumes of deionized water；It gradually adds and is mixed in the sulfuric acid, the potassium permanganate of 10~20g/l and the deashing agent to PVC slot of 40~50ml/l of 185~215ml/l with deionized water in proportion again, and stir evenly；Not only neutralization is good by the present invention, pollution-free, required at low cost and can meet the market demand.
Description
Technical field
The present invention relates to aluminium and aluminum alloy surface preconditioning technique fields more particularly to a kind of aluminium and aluminum alloy surface to locate in advance
Manage neutralizer and preparation method thereof.
Background technique
Aluminium alloy density is small, specific strength is high, is widely used in fields such as aviation, electronics, automobile, building, light industry.Using
Die-casting technique can be high, complex-shaped and light-weight with high-speed production precision aluminum alloy spare part.Therefore, pack alloy makes
Dosage just increases year by year.Due to the addition of the elements such as silicon and copper, it is substantially reduced die cast aluminum alloy part corrosion resistance, anode
Oxidation processes are not easy to obtain uniform protective film.In addition, its surface hardness is low, it is prone to wear, appearance gloss is not able to maintain too long,
Stain, decorative difference.Although it has been reported that chromate technology is a kind of preferable cast aluminium alloy surface treatment method, due to
Cr VI is unable to natural decomposition under natural environmental condition, easily leads to lesion in biology and accumulated in creatures.Therefore, China has been
European Union ROHS instruction is executed on March 1st, 2007, is forbidden in conversion processing process using harmful substances such as Cr VIs.Cause
This, researchs and develops aluminium and aluminum alloy surface handles new technology, new process, is of great significance.
In aluminium and pretreatment of aluminum alloy technique, aluminium and aluminium alloy after degreasing and alkaline etching process, iron, manganese in alloy,
Copper, magnesium, silicon etc. do not dissolve in alkali, residual on the surface of the workpiece, form the unconsolidated material of one layer of grey black, influence subsequent technique into
Row, it is therefore necessary to remove.Common method is chemical dissolution method in industrial processes, that is, usually said neutralization, or
For pickling.For neutralisation treatment, technique used is all fairly simple both at home and abroad, mostly uses three acid, bisgallic acid or mono-acid (nitric acid) greatly
Processing.Its purpose will not only remove the various oxides and dirt generated after alkaline etching processing, but also can be formed uniform and activation
Metal surface, in favor of the progress of subsequent treatment process.
But existing anodic oxidation neutralizer is mainly the dilute nitric acid solution of 300ml/l, have neutralize alkaline matter and
Remove the effect that ash is floated on surface.But contains nitrate ion in this neutralizer, have pollution to water quality, with State Bureau of Environmental Protection pair
Industrial wastewater total nitrogen and ammonia nitrogen plus strict control control, under the premise of not increasing cost, urgent need is sought in a kind of alternative nitric acid
And liquid.
Summary of the invention
It is good that the purpose of the present invention is to provide a kind of neutralizations, pollution-free, it is required it is at low cost, the market demand can be met
Aluminium and aluminum alloy surface pretreatment neutralizer and preparation method thereof.
To achieve the above object, the present invention is achieved by the following technical programs:
A kind of aluminium and aluminum alloy surface pre-process neutralizer, the composition and ratio range of the neutralizer are as follows: and sulfuric acid 185~
215ml/l, 10~20g/l of potassium permanganate, 40~50ml/l of deashing agent and deionized water surplus.
A kind of preparation method of aluminium and aluminum alloy surface pretreatment neutralizer, includes the following steps:
S1, required volumes of deionized water addition PVC slot is arrived；
S2, the potassium permanganate and 40~50ml/l for gradually adding the sulfuric acid of 185~215ml/l, 10~20g/l in proportion again
Deashing agent to PVC slot in mixed with deionized water, and stir evenly.
In conclusion compared with prior art, the present invention has the advantages that following substantive distinguishing features outstanding and significant:
(1) sulfuric acid in the present invention belongs to acid, can play the role of neutralizing alkaline matter, will not be to aluminium and aluminium alloy table
Face damages；
(2) because dilute sulfuric acid does not have strong oxidizing property, so increase the potassium permanganate with strong oxidizing property in dilute sulfuric acid, in
It is good and pollution-free with effect；
(3) addition of deashing agent can accelerate to degrease, the effect of natural oxide film.
Specific embodiment
Invention is further described With reference to embodiment:
Embodiment one:
A kind of aluminium and aluminum alloy surface pre-process neutralizer, the composition and ratio range of the neutralizer are as follows: sulfuric acid
185ml/l, potassium permanganate 20g/l, deashing agent 50ml/l and deionized water surplus.
A kind of preparation method of aluminium and aluminum alloy surface pretreatment neutralizer, includes the following steps:
S1, required volumes of deionized water addition PVC slot is arrived；
S2, the deashing agent of the sulfuric acid of 185ml/l, the potassium permanganate of 20g/l and 50ml/l is gradually added in proportion again to PVC
It mixes, and stirs evenly with deionized water in slot.
Embodiment two:
A kind of aluminium and aluminum alloy surface pre-process neutralizer, the composition and ratio range of the neutralizer are as follows: sulfuric acid
195ml/l, potassium permanganate 15g/l, deashing agent 48ml/l and deionized water surplus.
A kind of preparation method of aluminium and aluminum alloy surface pretreatment neutralizer, includes the following steps:
S1, required volumes of deionized water addition PVC slot is arrived；
S2, the deashing agent of the sulfuric acid of 195ml/l, the potassium permanganate of 15g/l and 48ml/l is gradually added in proportion again to PVC
It mixes, and stirs evenly with deionized water in slot.
Embodiment three:
A kind of aluminium and aluminum alloy surface pre-process neutralizer, the composition and ratio range of the neutralizer are as follows: sulfuric acid
205ml/l, potassium permanganate 13g/l, deashing agent 45ml/l and deionized water surplus.
A kind of preparation method of aluminium and aluminum alloy surface pretreatment neutralizer, includes the following steps:
S1, required volumes of deionized water addition PVC slot is arrived；
S2, the deashing agent of the sulfuric acid of 205ml/l, the potassium permanganate of 13g/l and 45ml/l is gradually added in proportion again to PVC
It mixes, and stirs evenly with deionized water in slot.
Example IV:
A kind of aluminium and aluminum alloy surface pre-process neutralizer, the composition and ratio range of the neutralizer are as follows: sulfuric acid
215ml/l, potassium permanganate 10g/l, deashing agent 40ml/l and deionized water surplus.
A kind of preparation method of aluminium and aluminum alloy surface pretreatment neutralizer, includes the following steps:
S1, required volumes of deionized water addition PVC slot is arrived；
S2, the deashing agent of the sulfuric acid of 215ml/l, the potassium permanganate of 10g/l and 40ml/l is gradually added in proportion again to PVC
It mixes, and stirs evenly with deionized water in slot.
Sulfuric acid and nitric acid in the prior art in the present invention all belong to acid, can act as the work for neutralizing alkaline matter
With.And nitric acid has strong oxidizing property, and product surface can be made to generate passivation, protect the product surface cleaned up not rotten
Erosion, because dilute sulfuric acid does not have strong oxidizing property, so increasing the potassium permanganate with strong oxidizing property in dilute sulfuric acid.Deashing agent adds
Enter to accelerate to degrease, the effect of natural oxide film.
For those skilled in the art, it is various corresponding that other can be made according to above technical scheme and design
Change and deformation, and all these change and modification all should belong within the scope of protection of the claims of the present invention.
Claims (2)
1. a kind of aluminium and aluminum alloy surface pre-process neutralizer, which is characterized in that the composition and ratio range of the neutralizer are as follows:
185~215ml/l of sulfuric acid, 10~20g/l of potassium permanganate, 40~50ml/l of deashing agent and deionized water surplus.
2. the preparation method of a kind of aluminium according to claim 1 and aluminum alloy surface pretreatment neutralizer, which is characterized in that
Include the following steps:
S1, required volumes of deionized water addition PVC slot is arrived；
S2, sulfuric acid, the potassium permanganate of 10~20g/l and the removing for 40~50ml/l for gradually adding 185~215ml/l in proportion again
It mixes, and stirs evenly with deionized water in grey agent to PVC slot.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910049265.3A CN109536970A (en) | 2019-01-18 | 2019-01-18 | A kind of aluminium and aluminum alloy surface pretreatment neutralizer and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910049265.3A CN109536970A (en) | 2019-01-18 | 2019-01-18 | A kind of aluminium and aluminum alloy surface pretreatment neutralizer and preparation method thereof |
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| Publication Number | Publication Date |
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| CN109536970A true CN109536970A (en) | 2019-03-29 |
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| CN201910049265.3A Pending CN109536970A (en) | 2019-01-18 | 2019-01-18 | A kind of aluminium and aluminum alloy surface pretreatment neutralizer and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113061896A (en) * | 2021-03-05 | 2021-07-02 | 福建省南平铝业股份有限公司 | Low-cost neutralization and ash removal treatment method for aluminum and aluminum alloy before oxidation |
Citations (4)
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|---|---|---|---|---|
| CN101122017A (en) * | 2007-09-21 | 2008-02-13 | 北京化工大学 | Chemical treatment method for aluminum alloy surface |
| CN104985750A (en) * | 2015-07-30 | 2015-10-21 | 广州辰东新材料有限公司 | Aluminum alloy surface treatment method for metal-plastic composite injection molding |
| CN105316691A (en) * | 2015-12-03 | 2016-02-10 | 广东威铝铝业股份有限公司 | Dedusting agent and preparation method thereof |
| CN106011715A (en) * | 2016-06-23 | 2016-10-12 | 巢湖鹏远金属焊管有限公司 | Pretreatment method for oxygen blowing welded pipe before welded pipe aluminizing processing |
-
2019
- 2019-01-18 CN CN201910049265.3A patent/CN109536970A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101122017A (en) * | 2007-09-21 | 2008-02-13 | 北京化工大学 | Chemical treatment method for aluminum alloy surface |
| CN104985750A (en) * | 2015-07-30 | 2015-10-21 | 广州辰东新材料有限公司 | Aluminum alloy surface treatment method for metal-plastic composite injection molding |
| CN105316691A (en) * | 2015-12-03 | 2016-02-10 | 广东威铝铝业股份有限公司 | Dedusting agent and preparation method thereof |
| CN106011715A (en) * | 2016-06-23 | 2016-10-12 | 巢湖鹏远金属焊管有限公司 | Pretreatment method for oxygen blowing welded pipe before welded pipe aluminizing processing |
Non-Patent Citations (1)
| Title |
|---|
| 尹小三等: ""铝合金阳极氧化的除灰工艺"", 《电镀与环保》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113061896A (en) * | 2021-03-05 | 2021-07-02 | 福建省南平铝业股份有限公司 | Low-cost neutralization and ash removal treatment method for aluminum and aluminum alloy before oxidation |
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Application publication date: 20190329 |
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