CN108560000A - A kind of method for demoulding and rework preocess of electrophoresis proximate matter - Google Patents
A kind of method for demoulding and rework preocess of electrophoresis proximate matter Download PDFInfo
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- CN108560000A CN108560000A CN201810666315.8A CN201810666315A CN108560000A CN 108560000 A CN108560000 A CN 108560000A CN 201810666315 A CN201810666315 A CN 201810666315A CN 108560000 A CN108560000 A CN 108560000A
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- proximate matter
- electrophoresis
- demoulding
- tank liquor
- lye
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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
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F1/00—Etching metallic material by chemical means
- C23F1/10—Etching compositions
- C23F1/14—Aqueous compositions
- C23F1/16—Acidic compositions
-
- 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
-
- 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
- C23G1/14—Cleaning or pickling metallic material with solutions or molten salts with alkaline solutions
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D13/00—Electrophoretic coating characterised by the process
- C25D13/22—Servicing or operating apparatus or multistep processes
Abstract
The invention discloses a kind of method for demoulding and rework preocess of electrophoresis proximate matter.Wherein, method for demoulding is handled by depainting and removes electrophoretic paint coating, is handled by sulfuric acid demoulding and the synergistic effect of alkali cleaning processing removes oxidation film, and handled by sulfuric acid demoulding to mitigate damage of the lye to proximate matter so that proximate matter can do over again.
Description
Technical field
The present invention relates to electrophoresis proximate matter technical field more particularly to a kind of method for demoulding and rework preocess of electrophoresis proximate matter.
Background technology
Proximate matter is the metal or alloy such as aluminium, aluminium alloy, iron, steel and material with some strength and toughness by rolling
Object with certain geometrical shape made of the techniques such as system, extrusion, casting.
Electrophoresis proximate matter refers to the proximate matter by electrophoretic process, the surface of proximate matter have acid and alkali-resistance, oxidation resistant oxidation film and
Electrophoretic paint coating.
In process of production, there are quality problems for the section bars branch after electrophoresis, and there are the electrophoresis proximate matters of quality problems
Processing can only be scrapped, therefore the quantity of proximate matter cannot meet the requirement of order, required proximate matter can only be squeezed out again, and carry out
Electrophoretic process.The cost of preceding process (extruding) can be increased by mending single production again in this way, and waste is bigger, and influences order delivery date.
Invention content
Technical problem to be solved by the present invention lies in provide a kind of method for demoulding of electrophoresis proximate matter, will be deposited on proximate matter
The protective film on surface removes so that proximate matter can do over again.
Technical problem to be solved by the present invention lies in, a kind of rework preocess of electrophoresis proximate matter is provided, shortening is done over again the time,
Reduce cost.
In order to solve the above technical problem, the present invention provides a kind of method for demoulding of electrophoresis proximate matter, including：
One, electrophoresis proximate matter being immersed in depainting tank liquor, removes electrophoretic paint coating, wherein the pH of depainting tank liquor is 1-2,
Soaking time is 60-180min；
Two, the electrophoresis proximate matter after removal electrophoretic paint coating is immersed in sulfuric acid tank liquor, removes oxide film dissolving, wherein sulfuric acid
A concentration of 60-240g/L of tank liquor, soaking time 15-45min；
Three, the electrophoresis proximate matter that step 2 obtains is immersed in lye, obtains demoulding proximate matter；
Four, with remaining lye in acid solution and on demoulding proximate matter.
As the improvement of said program, the lye in step 3 is sodium hydroxide solution.
As the improvement of said program, a concentration of 40-50g/L of the lye in step 3, alkali liquid temperature is 40-50 DEG C,
Aluminium ion concentration is 55-100g/L, soaking time 30-80s in lye.
As the improvement of said program, the acid solution in step 4 is sulfuric acid solution, a concentration of 160-240g/L.
As the improvement of said program, after completing step 1, remaining depainting tank liquor on electrophoresis proximate matter is washed with water；
After completing step 2, remaining sulfuric acid tank liquor on electrophoresis proximate matter is washed with water；After completing step 3, it is washed with water and takes off
Remaining lye on membranous type material；After completing step 4, remaining acid solution on demoulding proximate matter is washed with water.
Correspondingly, the present invention also provides a kind of rework preocess of electrophoresis proximate matter, including：
Demoulding proximate matter after any of the above-described is neutralized pre-processes；
Electrophoresis is carried out to pretreated demoulding proximate matter, obtains electrophoresis proximate matter.
As the improvement of said program, carrying out electrophoresis to pretreated demoulding proximate matter includes：
Pretreated demoulding proximate matter is placed in electrophoresis groove liquid, energization 2-5min, voltage 80-160V, electrophoresis groove liquid
PH is 7.9-8.3, and TA values are 27-35, and AV values are 21-27, and amine mole ratio is 0.7-0.8.
As the improvement of said program, pretreatment includes the following steps：Demoulding proximate matter after neutralization is placed on oxidation tank liquor
In, the temperature for aoxidizing tank liquor is 17-23 DEG C, current density 120-160A/dm2。
As the improvement of said program, oxidation tank liquor is sulfuric acid solution, a concentration of 160-180g/L.
As the improvement of said program, pretreatment is further comprising the steps of：Demoulding proximate matter after oxidation is carried out soup to wash, is made
Demoulding proximate matter is in semi-closed state, and temperature is 70-80 DEG C, time 3-8min.
Implement the present invention, has the advantages that：
1, the method for demoulding of a kind of electrophoresis proximate matter provided by the invention is handled by depainting and removes electrophoretic paint coating, is led to
The synergistic effect of the processing of persulfuric acid demoulding and alkali cleaning processing removes oxidation film, and is handled by sulfuric acid demoulding to mitigate lye pair
The damage of proximate matter so that proximate matter can do over again.
2, the present invention efficiently reduces the preceding process for mending single reproduction by will do over again after electrophoresis proximate matter depainting demoulding
Production cost, shorten and mend time difference for singly producing, effectively improve order storage rate on time.
Description of the drawings
Fig. 1 is the flow diagram of the method for demoulding of electrophoresis proximate matter of the present invention；
Fig. 2 is the flow diagram of the rework preocess of electrophoresis proximate matter of the present invention.
Specific implementation mode
To make the object, technical solutions and advantages of the present invention clearer, the present invention is made into one below in conjunction with attached drawing
Step ground detailed description.
Fig. 1 is the method for demoulding flow chart of electrophoresis proximate matter of the present invention, and the present invention provides a kind of demoulding sides of electrophoresis proximate matter
Method includes the following steps：
S101, depainting processing, electrophoresis proximate matter is immersed in depainting tank liquor, electrophoretic paint coating is removed.
Preferably, the pH of depainting tank liquor is 1-2, soaking time 60-180min.
Depainting tank liquor is paint stripper, model T8999 in this application.
It should be noted that the electrophoresis proximate matter by electrophoresis curing process, surface has the electrophoretic paint of one layer of acid and alkali-resistance
Coating, since electrophoresis proximate matter has certain resistance to acid and alkali, it is therefore desirable to which the high paint stripper of acidity applies to remove electrophoretic paint
Layer.When the pH of depainting tank liquor is more than 2, paint stripper can not dissolve electrophoretic paint coating, cannot expose oxidation film, can not
Carry out subsequent demoulding processing.
Electrophoretic paint coating is generally divided into A grades and B grades, and electrophoretic paint coating thickness is that 7-11u belongs to B grades, and electrophoretic paint coating is thick
Degree belongs to A grades more than or equal to 12u.The pH value and soaking time of depainting tank liquor are related with the thickness of electrophoretic paint coating, such as 1 institute of table
Show：
Electrophoretic paint coating thickness is bigger, and soaking time is longer.
S102, the processing of sulfuric acid demoulding, the electrophoresis proximate matter after removal electrophoretic paint coating is immersed in sulfuric acid tank liquor, deoxygenation is gone
Change film.
Preferably, a concentration of 160-240g/L of sulfuric acid tank liquor, soaking time 15-45min.
Oxidation film is to be located at the electrophoretic paint coating back side, for protecting proximate matter, extends the time that proximate matter aoxidizes.The present invention
Sulfuric acid tank liquor and oxidation film carry out reduction reaction, to which oxidation film be removed.
Be stored in the sulfuric acid tank liquor of neutralization chamber or oxidation trough is the existing tank liquor in electrophoresis proximate matter in technique, need not be another
Outer increase slot and tank liquor, the present invention are made a return journey oxide film dissolving using existing tank liquor, are effectively saved cost and time.
S103, alkali cleaning processing, the electrophoresis proximate matter that step 2 obtains is immersed in lye, demoulding proximate matter is obtained.
Preferably, lye is sodium hydroxide solution.In the other embodiment of the application, lye can also be other alkalinity
The solution of substance.
It should be noted that the surface that the oxidation film after reduction reaction is also attached to proximate matter occurs with sulfuric acid tank liquor, need
Alkali cleaning handles to remove it, and proximate matter is exposed, electrophoresis can be just re-started.
Specifically, the electrophoresis proximate matter that step 2 obtains is immersed in lye, lye and the oxidation film that reduction reaction occurs
Oxidation reaction further occurs, oxidation film is finally dissolved in lye, to expose proximate matter.Preferably, lye is dense
Degree is 40-50g/L, and alkali liquid temperature is 40-50 DEG C, and aluminium ion concentration is 55-100g/L, soaking time 30-80s in lye.
Wherein, the electrophoresis proximate matter after removal electrophoretic paint coating is first subjected to sulfuric acid demoulding processing before carrying out alkali cleaning, it can
To alleviate the damage that alkali cleaning brings proximate matter by sulfuric acid.Since the electrophoretic paint coating of electrophoresis Surface of profile has been removed, electricity
Swimming proximate matter is easy to be corroded by alkaline solution, and the oxidation film on electrophoresis proximate matter finally needs lye to remove, therefore
Before carrying out alkali cleaning, first electrophoresis proximate matter is immersed in sulfuric acid tank liquor and is first reacted with oxidation film, the leaching of electrophoresis proximate matter can be shortened
Steep the time in lye.In addition, the aluminium ion in lye can further mitigate damage of the lye to proximate matter, due to aluminium ion
Lye can be stopped to losing the corrosion of the proximate matter of oxidation film.It is aluminum ions when aluminum ions concentration is less than 55g/L in lye
Lazy weight enough stops lye, and when aluminum ions concentration is more than 100g/L, aluminum ions quantity is excessive, influences lye and occurs
Oxidation reaction occurs for the oxidation film of reduction reaction.
S104, neutralisation treatment, in acid solution and demoulding proximate matter on remaining lye.
Preferably, acid solution is sulfuric acid solution, a concentration of 160-240g/L.
It should be noted that after completing step 1, remaining depainting tank liquor on electrophoresis proximate matter is washed with water；It completes
After step 2, remaining sulfuric acid tank liquor on electrophoresis proximate matter is washed with water；After completing step 3, demoulding proximate matter is washed with water
Upper remaining lye；After completing step 4, remaining acid solution on demoulding proximate matter is washed with water.
Fig. 2 is the rework preocess flow chart of electrophoresis proximate matter of the present invention, and the present invention also provides a kind of doing over again for electrophoresis proximate matter
Technique includes the following steps：
S201, any of the above-described is neutralized after demoulding proximate matter pre-process.
S202, electrophoresis is carried out to pretreated demoulding proximate matter, obtains electrophoresis proximate matter.
Carrying out electrophoresis to pretreated demoulding proximate matter includes：Pretreated demoulding proximate matter is placed in electrophoresis groove liquid,
Energization 2-5min, voltage 80-160V, electrophoresis groove liquid pH are 7.9-8.3, and TA values are 27-35, and AV values are 21-27, amine gram molecule
Than for 0.7-0.8.
Pretreatment includes the following steps：Demoulding proximate matter after neutralization is placed in oxidation tank liquor, the temperature for aoxidizing tank liquor is
17-23 DEG C, current density 120-160A/dm2。
Preferably, oxidation tank liquor is sulfuric acid solution, a concentration of 160-180g/L.
It pre-processes further comprising the steps of：Demoulding proximate matter after oxidation carries out soup and washes, and demoulding proximate matter is made to be in semiclosed shape
State, temperature are 70-80 DEG C, time 3-8min.
The present invention efficiently reduces the preceding process for mending single reproduction by will do over again after electrophoresis proximate matter depainting demoulding
Production cost shortens the time difference mended and singly produced, effectively improves order storage rate on time.Specifically, preceding process benefit is single most fast
It needs for 24 hours, what is had may need 1-3 days because of influences such as extruding problem, mold problems, and the depainting demoulding time of the present invention is only
1-3h between needing can shorten 21-23h than mending single time, save the benefit list time of 87.5-95.83%.
With specific embodiment, the present invention is further explained below
Embodiment 1
The rework preocess of electrophoresis proximate matter, including：
S101, electrophoresis proximate matter being immersed in depainting tank liquor, removes electrophoretic paint coating, wherein the pH of depainting tank liquor is 1,
Soaking time is 60min；
S102, the electrophoresis proximate matter after removal electrophoretic paint coating is immersed in sulfuric acid tank liquor, removes oxide film dissolving, wherein sulphur
A concentration of 160g/L of acid tank liquid, soaking time 40min；
S103, the electrophoresis proximate matter that step 2 obtains is immersed in lye, obtains demoulding proximate matter；
S104, with remaining lye in a concentration of 160g/L sulfuric acid solutions and on demoulding proximate matter；
S105, the demoulding proximate matter after neutralization is placed in a concentration of 160g/L sulfuric acid solutions, the temperature for aoxidizing tank liquor is 17
DEG C, current density 150A/dm2；
S106：The demoulding proximate matter that step S105 is obtained is placed in electrophoresis groove liquid, energization 2min, voltage 150V, electrophoresis
It is 27, AV values is 21 that tank liquor pH, which is 7.9, TA values, and amine mole ratio is 0.7.
Embodiment 2
The rework preocess of electrophoresis proximate matter, including：
S101, electrophoresis proximate matter is immersed in depainting tank liquor, removes electrophoretic paint coating, wherein the pH of depainting tank liquor is
1.5, soaking time 90min；
S102, the electrophoresis proximate matter after removal electrophoretic paint coating is immersed in sulfuric acid tank liquor, removes oxide film dissolving, wherein sulphur
A concentration of 180g/L of acid tank liquid, soaking time 35min；
S103, the electrophoresis proximate matter that step 2 obtains is immersed in lye, obtains demoulding proximate matter；
S104, with remaining lye in a concentration of 180g/L sulfuric acid solutions and on demoulding proximate matter；
S105, the demoulding proximate matter after neutralization is placed in a concentration of 165g/L sulfuric acid solutions, the temperature for aoxidizing tank liquor is 18
DEG C, current density 145A/dm2；
S106：The demoulding proximate matter that step S105 is obtained is placed in electrophoresis groove liquid, energization 3min, voltage 140V, electrophoresis
It is 29, AV values is 23 that tank liquor pH, which is 8.0, TA values, and amine mole ratio is 0.7.
Embodiment 3
The rework preocess of electrophoresis proximate matter, including：
S101, electrophoresis proximate matter is immersed in depainting tank liquor, removes electrophoretic paint coating, wherein the pH of depainting tank liquor is
1.5, soaking time 110min；
S102, the electrophoresis proximate matter after removal electrophoretic paint coating is immersed in sulfuric acid tank liquor, removes oxide film dissolving, wherein sulphur
A concentration of 200g/L of acid tank liquid, soaking time 30min；
S103, the electrophoresis proximate matter that step 2 obtains is immersed in lye, obtains demoulding proximate matter；
S104, with remaining lye in a concentration of 200g/L sulfuric acid solutions and on demoulding proximate matter；
S105, the demoulding proximate matter after neutralization is placed in a concentration of 170g/L sulfuric acid solutions, the temperature for aoxidizing tank liquor is 19
DEG C, current density 135A/dm2；
S106：Demoulding proximate matter after step S105 oxidations is carried out soup to wash, demoulding proximate matter is made to be in semi-closed state, temperature
It is 70 DEG C, time 7min.
S107：The demoulding proximate matter that step S106 is obtained is placed in electrophoresis groove liquid, energization 3min, voltage 125V, electrophoresis
It is 29, AV values is 23 that tank liquor pH, which is 8.0, TA values, and amine mole ratio is 0.7.
Embodiment 4
The rework preocess of electrophoresis proximate matter, including：
S101, electrophoresis proximate matter is immersed in depainting tank liquor, removes electrophoretic paint coating, wherein the pH of depainting tank liquor is
1.5, soaking time 130min；
S102, the electrophoresis proximate matter after removal electrophoretic paint coating is immersed in sulfuric acid tank liquor, removes oxide film dissolving, wherein sulphur
A concentration of 210g/L of acid tank liquid, soaking time 25min；
S103, the electrophoresis proximate matter that step 2 obtains is immersed in lye, obtains demoulding proximate matter；
S104, with remaining lye in a concentration of 220g/L sulfuric acid solutions and on demoulding proximate matter；
S105, the demoulding proximate matter after neutralization is placed in a concentration of 175g/L sulfuric acid solutions, the temperature for aoxidizing tank liquor is 21
DEG C, current density 120A/dm2；
S106：Demoulding proximate matter after step S105 oxidations is carried out soup to wash, demoulding proximate matter is made to be in semi-closed state, temperature
It is 75 DEG C, time 5min.
S107：The demoulding proximate matter that step S106 is obtained is placed in electrophoresis groove liquid, energization 3min, voltage 145V, electrophoresis
It is 31, AV values is 24 that tank liquor pH, which is 8.1, TA values, and amine mole ratio is 0.8.
Embodiment 5
The rework preocess of electrophoresis proximate matter, including：
S101, electrophoresis proximate matter is immersed in depainting tank liquor, removes electrophoretic paint coating, wherein the pH of depainting tank liquor is
2.0, soaking time 150min；
S102, the electrophoresis proximate matter after removal electrophoretic paint coating is immersed in sulfuric acid tank liquor, removes oxide film dissolving, wherein sulphur
A concentration of 230g/L of acid tank liquid, soaking time 25min；
S103, the electrophoresis proximate matter that step 2 obtains is immersed in lye, obtains demoulding proximate matter；
S104, with remaining lye in a concentration of 230g/L sulfuric acid solutions and on demoulding proximate matter；
S105, the demoulding proximate matter after neutralization is placed in a concentration of 170g/L sulfuric acid solutions, the temperature for aoxidizing tank liquor is 22
DEG C, current density 130A/dm2；
S106：Demoulding proximate matter after step S105 oxidations is carried out soup to wash, demoulding proximate matter is made to be in semi-closed state, temperature
It is 75 DEG C, time 6min.
S107：The demoulding proximate matter that step S106 is obtained is placed in electrophoresis groove liquid, energization 5min, voltage 130V, electrophoresis
It is 33, AV values is 25 that tank liquor pH, which is 8.0, TA values, and amine mole ratio is 0.8.
Embodiment 6
The rework preocess of electrophoresis proximate matter, including：
S101, electrophoresis proximate matter is immersed in depainting tank liquor, removes electrophoretic paint coating, wherein the pH of depainting tank liquor is
2.0, soaking time 170min；
S102, the electrophoresis proximate matter after removal electrophoretic paint coating is immersed in sulfuric acid tank liquor, removes oxide film dissolving, wherein sulphur
A concentration of 240g/L of acid tank liquid, soaking time 20min；
S103, the electrophoresis proximate matter that step 2 obtains is immersed in lye, obtains demoulding proximate matter；
S104, with remaining lye in a concentration of 240g/L sulfuric acid solutions and on demoulding proximate matter；
S105, the demoulding proximate matter after neutralization is placed in a concentration of 175g/L sulfuric acid solutions, the temperature for aoxidizing tank liquor is 22
DEG C, current density 155A/dm2；
S106：Demoulding proximate matter after step S105 oxidations is carried out soup to wash, demoulding proximate matter is made to be in semi-closed state, temperature
It is 80 DEG C, time 3min.
S107：The demoulding proximate matter that step S106 is obtained is placed in electrophoresis groove liquid, energization 2min, voltage 155V, electrophoresis
It is 34, AV values is 26 that tank liquor pH, which is 8.2, TA values, and amine mole ratio is 0.75.
It is above disclosed to be only a preferred embodiment of the present invention, the power of the present invention cannot be limited with this certainly
Sharp range, therefore equivalent changes made in accordance with the claims of the present invention, are still within the scope of the present invention.
Claims (10)
1. a kind of method for demoulding of electrophoresis proximate matter, which is characterized in that including：
One, electrophoresis proximate matter is immersed in depainting tank liquor, removes electrophoretic paint coating, wherein the pH of depainting tank liquor is 1-2, is impregnated
Time is 60-180min；
Two, the electrophoresis proximate matter after removal electrophoretic paint coating is immersed in sulfuric acid tank liquor, removes oxide film dissolving, wherein sulfuric acid tank liquor
A concentration of 160-240g/L, soaking time 15-45min；
Three, the electrophoresis proximate matter that step 2 obtains is immersed in lye, obtains demoulding proximate matter；
Four, with remaining lye in acid solution and on demoulding proximate matter.
2. the method for demoulding of electrophoresis proximate matter as described in claim 1, which is characterized in that the lye in step 3 is sodium hydroxide
Solution.
3. the method for demoulding of electrophoresis proximate matter as claimed in claim 2, which is characterized in that lye in step 3 it is a concentration of
40-50g/L, alkali liquid temperature are 40-50 DEG C, and aluminium ion concentration is 55-100g/L, soaking time 30-80s in lye.
4. the method for demoulding of electrophoresis proximate matter as described in claim 1, which is characterized in that the acid solution in step 4 is that sulfuric acid is molten
Liquid, a concentration of 160-240g/L.
5. the method for demoulding of electrophoresis proximate matter as described in claim 1, which is characterized in that after completing step 1, be washed with water
Remove remaining depainting tank liquor on electrophoresis proximate matter；After completing step 2, remaining sulfuric acid tank liquor on electrophoresis proximate matter is washed with water；
After completing step 3, remaining lye on demoulding proximate matter is washed with water；After completing step 4, demoulding type is washed with water
Remaining acid solution on material.
6. a kind of rework preocess of electrophoresis proximate matter, which is characterized in that including：
Demoulding proximate matter after wanting any one of 1-5 to neutralize right pre-processes；
Electrophoresis is carried out to pretreated demoulding proximate matter, obtains electrophoresis proximate matter.
7. the rework preocess of electrophoresis proximate matter as claimed in claim 6, which is characterized in that carried out to pretreated demoulding proximate matter
Electrophoresis includes：
Pretreated demoulding proximate matter is placed in electrophoresis groove liquid, energization 2-5min, voltage 80-160V, electrophoresis groove liquid pH is
7.9-8.3, TA value are 27-35, and AV values are 21-27, and amine mole ratio is 0.7-0.8.
8. the rework preocess of electrophoresis proximate matter as claimed in claim 6, which is characterized in that pretreatment includes the following steps：Will in
Demoulding proximate matter with after is placed in oxidation tank liquor, and the temperature for aoxidizing tank liquor is 17-23 DEG C, current density 120-160A/dm2。
9. the rework preocess of electrophoresis proximate matter as claimed in claim 8, which is characterized in that oxidation tank liquor is sulfuric acid solution, concentration
For 160-180g/L.
10. the rework preocess of electrophoresis proximate matter as claimed in claim 9, which is characterized in that pretreatment is further comprising the steps of：It will
Demoulding proximate matter after oxidation carries out soup and washes, and demoulding proximate matter is made to be in semi-closed state, and temperature is 70-80 DEG C, time 3-8min.
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Cited By (1)
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| CN110318061A (en) * | 2019-07-17 | 2019-10-11 | 安徽启明表面技术有限公司 | The minimizing technology of Process on Aluminum Alloy Oxidation Film |
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