CN107245743A - A kind of method for removing rectifier bridge electroplating matt tin surfaces jaundice part - Google Patents
A kind of method for removing rectifier bridge electroplating matt tin surfaces jaundice part Download PDFInfo
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- CN107245743A CN107245743A CN201710396018.1A CN201710396018A CN107245743A CN 107245743 A CN107245743 A CN 107245743A CN 201710396018 A CN201710396018 A CN 201710396018A CN 107245743 A CN107245743 A CN 107245743A
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- rectifier bridge
- jaundice
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- washing
- electroplating
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/48—After-treatment of electroplated surfaces
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D7/00—Electroplating characterised by the article coated
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- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Electroplating Methods And Accessories (AREA)
Abstract
The invention provides a kind of method for removing rectifier bridge electroplating matt tin surfaces jaundice part, it is related to rectifier bridge technical field, comprises the following steps：The rectifier bridge product of jaundice is taken, is soaked in pyrovinic acid solution；Wash for the first time；Neutralisation treatment；Second of washing；Ultrasonic pure water is washed；Dewater treatment.The method for removing rectifier bridge electroplating matt tin surfaces jaundice part of the present invention, inorganic agent is used as using pyrovinic acid, directly the rectifier bridge product of jaundice is immersed in pyrovinic acid, then reuse isopropanol and carry out dewater treatment, simply can rapidly remove the jaundice part of rectifier bridge product dumb light tin surfaces.Present invention, avoiding tin electroplating technique again is moved back, a large amount of water power have not only been saved, while also saving the plenty of time, operating efficiency have been improved.The present invention has prevented water spots generation using isopropanol dehydration simultaneously, and whole processing technology is environmentally friendly and time-consuming short, does not influence product quality again on the basis of energy-saving, reaches doulbe-sides' victory effect.
Description
Technical field
The present invention relates to rectifier bridge technical field, more particularly to a kind of removal rectifier bridge electroplating matt tin surfaces jaundice part
Method.
Background technology
The base material of rectifier bridge is red copper, in order to improve the solderability and corrosion resistance of red copper, is generally electroplated in substrate surface
Tin.Rectifier bridge product meets sour contaminated vapor after plating, in being long placed in or transporting can cause tin layers surface discolouration to turn to be yellow.Prior art
In, the processing for part of turning to be yellow is typically to move back tin to electroplate again.The concrete operations for moving back tin are to put the rectifier bridge product of jaundice
Immersion 8min or so in the dust technology that concentration is 10% is placed in, different electroplating currents are then selected further according to different materials, are entered
Row second time electroplating, electroplating time is 30min, carries out hot water wash after plating again, and high-temperature baking is finally carried out again, and baking temperature is
150 DEG C, baking time is 2 hours.
However, moving back during tin electroplates again, tin is moved back using nitric acid, a large amount of sour vapour and tobacco is easily produced, meanwhile, two
Secondary plating and baking can cause electricity to waste, moreover, entirely moving back tin, electroplating technique takes long, production efficiency again
It is low.When moving back tin using nitric acid, if long soaking time, also resulting in the surface of the base material red copper of rectifier bridge product becomes
Coarse or thickness is thinning, and so damage to rectifier bridge product is very big.In addition, this method is suitable only for undecomposed rectifier bridge,
Rack plating plating can not be carried out for the material after decomposition.
The content of the invention
It is an object of the invention to provide a kind of method for removing rectifier bridge electroplating matt tin surfaces jaundice part, quickly to go
Except the jaundice part on rectifier bridge surface, and save water power and time.
The technical scheme that the present invention solves above-mentioned technical problem is as follows：
The invention provides a kind of method for removing rectifier bridge electroplating matt tin surfaces jaundice part, comprise the following steps：
Step S1, the rectifier bridge product for taking jaundice, are soaked in pyrovinic acid solution；
Step S2, the rectifier bridge product progress first time washing to passing through immersion；
Step S3, the rectifier bridge product that will be washed by first time be placed in trisodium phosphate solution and carry out neutralisation treatment；
Step S4, second is carried out to the rectifier bridge product Jing Guo neutralisation treatment wash；
Step S5, the rectifier bridge product to second of washing of process carry out ultrasonic pure water and washed；
Step S6, the rectifier bridge product progress dewater treatment to being washed by ultrasonic pure water, so as to obtain the removal table
The rectifier bridge product of face jaundice part.
On the basis of above-mentioned technical proposal, the present invention can also do following improvement：
Alternatively, in the step S1, the volumetric concentration of the pyrovinic acid solution is 15%-20%, and soak time is
2.5-3.5min。
Alternatively, in the step S2, washing for the first time uses pure water rinsing, and washing time is 13-17s.
Alternatively, in the step S3, the concentration of the trisodium phosphate solution is 28-32g/L, and the temperature of neutralisation treatment is
55-65 DEG C, the time of neutralisation treatment is 55-65s.
Alternatively, in the step S4, second of washing is rinsed using running water, and washing time is 13-17s.
Alternatively, in the step S5, the washing time that ultrasonic pure water is washed is 55-65s.
Alternatively, in the step S6, dewater treatment is carried out using industrial level isopropanol, the time of dewater treatment is 8-
12s。
Alternatively, in addition to：Step S7, the rectifier bridge product Jing Guo dewater treatment is toasted.
Alternatively, in the step S7, the temperature of baking is 45-55 DEG C, and the time of baking is 28-32min.
Beneficial effects of the present invention：
The method for removing rectifier bridge electroplating matt tin surfaces jaundice part of the present invention, place is used as by using pyrovinic acid
Agent is managed, directly the rectifier bridge product of jaundice is immersed in pyrovinic acid, isopropanol is then reused and carries out dewater treatment, can be with
The simple jaundice part for rapidly removing rectifier bridge product dumb light tin surfaces.Present invention, avoiding moving back tin electroplating technique again,
A large amount of water power have not only been saved, while also saving the plenty of time, operating efficiency have been improved.The present invention is taken off using isopropanol simultaneously
Water has prevented water spots generation, and whole processing technology is environmentally friendly and time-consuming short, and product quality is not influenceed again on the basis of energy-saving,
Reach doulbe-sides' victory effect.
Brief description of the drawings
Fig. 1 is the technological process of the method for removing rectifier bridge electroplating matt tin surfaces jaundice part of the embodiment of the present invention
Figure.
Embodiment
The principle and feature of the present invention are described below in conjunction with accompanying drawing, the given examples are served only to explain the present invention, and
It is non-to be used to limit the scope of the present invention.
Fig. 1 is the technological process of the method for removing rectifier bridge electroplating matt tin surfaces jaundice part of the embodiment of the present invention
Figure.Referring to Fig. 1, the embodiments of the invention provide a kind of method for removing rectifier bridge electroplating matt tin surfaces jaundice part, including
Following steps：
Step S1, the rectifier bridge product for taking jaundice, are soaked in pyrovinic acid solution, the volume of the pyrovinic acid solution
Concentration is 15%-20%, and soak time is 2.5-3.5min.
In step S1, the jaundice part of rectifier bridge product surface is stannic disulfide (SnS2), rectifier bridge product is soaked
Steep in pyrovinic acid, it is fully reacted, remove the stannic disulfide of rectifier bridge product surface, wherein, chemical principle is such as
Under：
SnS2+CH3SO3H→H2S+(CH3SO3)2Sn
In the processing procedure of the present invention, pyrovinic acid is weak acid, adds pyrovinic acid, pyrovinic acid meeting and stannic disulfide
Chemically react, produce tin methane sulfonate.Also, pyrovinic acid will not be to the tin coating and base material red copper of rectifier bridge product
Any influence is produced, the integrality of rectifier bridge product is protected.
In actual production process, pyrovinic acid is removed here with pyrovinic acid and sent out as conventional plated material
Yellow part, it is convenient and swift, while extra ion will not be brought into.
Wherein, pyrovinic acid is taken out of due to liquid medicine in immersion and occurs to add in proportion when liquid level is not enough.
Step S2, the rectifier bridge product progress first time washing to passing through immersion, for the first time washing use pure water rinsing, punching
The time is washed for 13-17s.
In step S2, using the purpose of pure water rinsing be remove rectifier bridge product surface residual pyrovinic acid and
The impurity such as reaction product, if being rinsed using running water, it is possible to meeting residual fraction impurity, therefore, from pure water rinsing.
Step S3, the rectifier bridge product that will be washed by first time be placed in trisodium phosphate solution and carry out neutralisation treatment, institute
The concentration for stating trisodium phosphate solution is 28-32g/L, and the temperature of neutralisation treatment is 55-65 DEG C, and the time of neutralisation treatment is 55-
65s。
In step S3, because in step sl, rectifier bridge product is immersed in pyrovinic acid, eliminates its surface
Passivating film, and rectifier bridge product is immersed in trisodium phosphate solution, one layer of passivating film can be produced in product surface again.
Step S4, second is carried out to the rectifier bridge product Jing Guo neutralisation treatment wash, second of washing uses running water
Rinse, washing time is 13-17s.
In step S4, rectifier bridge product is rinsed using running water, unnecessary trisodium phosphate solution is removed.
Step S5, the rectifier bridge product to second of washing of process carry out ultrasonic pure water and washed, and what ultrasonic pure water was washed rushes
The time is washed for 55-65s.
In step S5, washed using ultrasonic pure water and cleaning down is carried out to rectifier bridge product.
Step S6, the rectifier bridge product progress dewater treatment to being washed by ultrasonic pure water, are entered using industrial level isopropanol
Row dewater treatment, the time of dewater treatment is 8-12s.
In step S6, the moisture of rectifier bridge product surface is removed using isopropanol, prevents moisture after the later stage dries
Water spots is left in rectifier bridge product surface.Rectifier bridge product needs all submergences during isopropanol dehydration, and liquid level is directly added when not enough
Stoste (isopropanol).
Step S7, the rectifier bridge product Jing Guo dewater treatment is toasted, so as to obtain the removal surface jaundice portion
The rectifier bridge product divided, wherein, the temperature of baking is 45-55 DEG C, and the time of baking is 28-32min.
In step S7, using low-temperature bake, dry rectifier bridge product is obtained.
The method for removing rectifier bridge electroplating matt tin surfaces jaundice part of the present invention, place is used as by using pyrovinic acid
Agent is managed, directly the rectifier bridge product of jaundice is immersed in pyrovinic acid, isopropanol is then reused and carries out dewater treatment, can be with
The simple jaundice part for rapidly removing rectifier bridge product dumb light tin surfaces.Present invention, avoiding moving back tin electroplating technique again,
A large amount of water power have not only been saved, while also saving the plenty of time, operating efficiency have been improved.The present invention is taken off using isopropanol simultaneously
Water has prevented water spots generation, and whole processing technology is environmentally friendly and time-consuming short, and product quality is not influenceed again on the basis of energy-saving,
Reach doulbe-sides' victory effect.
Below will be by specific embodiment come the present invention will be described.
Embodiment 1
In the present embodiment, rectifier bridge product electroplating matt tin surfaces jaundice part is removed using following steps：
1. taking the rectifier bridge product of jaundice, it is soaked in pyrovinic acid solution, the volumetric concentration of the pyrovinic acid solution
For 15%, soak time is 3.5min.
2. pair by immersion rectifier bridge product carry out first time washing, for the first time washing use pure water rinsing, during flushing
Between be 13s.
3. the rectifier bridge product by washing for the first time is placed in trisodium phosphate solution and carries out neutralisation treatment, the phosphoric acid
The concentration of three sodium solutions is 28g/L, and the temperature of neutralisation treatment is 55 DEG C, and the time of neutralisation treatment is 65s.
Washed 4. the rectifier bridge product pair Jing Guo neutralisation treatment carries out second, second of washing is rinsed using running water,
Washing time is 13s.
5. carry out ultrasonic pure water to the rectifier bridge product by second of washing to wash, the washing time that ultrasonic pure water is washed
For 55s.
6. pair rectifier bridge product washed by ultrasonic pure water carries out dewater treatment, it is dehydrated using industrial level isopropanol
Processing, the time of dewater treatment is 8s.
7. the rectifier bridge product pair Jing Guo dewater treatment is toasted, so as to obtain the whole of the removal surface jaundice part
Bridge product is flowed, wherein, the temperature of baking is 45 DEG C, and the time of baking is 32min.
Embodiment 2
In the present embodiment, rectifier bridge product electroplating matt tin surfaces jaundice part is removed using following steps：
1. taking the rectifier bridge product of jaundice, it is soaked in pyrovinic acid solution, the volumetric concentration of the pyrovinic acid solution
For 18%, soak time is 3min.
2. pair by immersion rectifier bridge product carry out first time washing, for the first time washing use pure water rinsing, during flushing
Between be 15s.
3. the rectifier bridge product by washing for the first time is placed in trisodium phosphate solution and carries out neutralisation treatment, the phosphoric acid
The concentration of three sodium solutions is 30g/L, and the temperature of neutralisation treatment is 60 DEG C, and the time of neutralisation treatment is 60s.
Washed 4. the rectifier bridge product pair Jing Guo neutralisation treatment carries out second, second of washing is rinsed using running water,
Washing time is 15s.
Washed 5. the rectifier bridge product of second of washing of pair process carries out ultrasonic pure water, the washing time that ultrasonic pure water is washed
For 60s.
6. pair rectifier bridge product washed by ultrasonic pure water carries out dewater treatment, it is dehydrated using industrial level isopropanol
Processing, the time of dewater treatment is 10s.
7. the rectifier bridge product pair Jing Guo dewater treatment is toasted, so as to obtain the whole of the removal surface jaundice part
Bridge product is flowed, wherein, the temperature of baking is 50 DEG C, and the time of baking is 30min.
Embodiment 3
In the present embodiment, rectifier bridge product electroplating matt tin surfaces jaundice part is removed using following steps：
1. taking the rectifier bridge product of jaundice, it is soaked in pyrovinic acid solution, the volumetric concentration of the pyrovinic acid solution
For 20%, soak time is 2.5min.
2. pair by immersion rectifier bridge product carry out first time washing, for the first time washing use pure water rinsing, during flushing
Between be 17s.
3. the rectifier bridge product by washing for the first time is placed in trisodium phosphate solution and carries out neutralisation treatment, the phosphoric acid
The concentration of three sodium solutions is 32g/L, and the temperature of neutralisation treatment is 65 DEG C, and the time of neutralisation treatment is 55s.
Washed 4. the rectifier bridge product pair Jing Guo neutralisation treatment carries out second, second of washing is rinsed using running water,
Washing time is 17s.
Washed 5. the rectifier bridge product of second of washing of pair process carries out ultrasonic pure water, the washing time that ultrasonic pure water is washed
For 65s.
6. pair rectifier bridge product washed by ultrasonic pure water carries out dewater treatment, it is dehydrated using industrial level isopropanol
Processing, the time of dewater treatment is 12s.
7. the rectifier bridge product pair Jing Guo dewater treatment is toasted, so as to obtain the whole of the removal surface jaundice part
Bridge product is flowed, wherein, the temperature of baking is 55 DEG C, and the time of baking is 28min.
Generally, for the jaundice part of rectifier bridge product surface, tin is moved back again at plating using original nitric acid
The process costs of reason are 0.4 yuan/bar, and use the process costs of the utilization pyrovinic acid processing of the present invention for 0.05 yuan/bar.By
This is visible, the method for the removal rectifier bridge electroplating matt tin surfaces jaundice part that the present invention is provided, and greatly reduces production cost,
While rectifier bridge product surface jaundice part is removed, it is ensured that the quality of product.
The foregoing is only presently preferred embodiments of the present invention, be not intended to limit the invention, it is all the present invention spirit and
Within principle, any modification, equivalent substitution and improvements made etc. should be included in the scope of the protection.
Claims (9)
1. a kind of method for removing rectifier bridge electroplating matt tin surfaces jaundice part, it is characterised in that comprise the following steps：
Step S1, the rectifier bridge product for taking jaundice, are soaked in pyrovinic acid solution；
Step S2, the rectifier bridge product progress first time washing to passing through immersion；
Step S3, the rectifier bridge product that will be washed by first time be placed in trisodium phosphate solution and carry out neutralisation treatment；
Step S4, second is carried out to the rectifier bridge product Jing Guo neutralisation treatment wash；
Step S5, the rectifier bridge product to second of washing of process carry out ultrasonic pure water and washed；
Step S6, the rectifier bridge product progress dewater treatment to being washed by ultrasonic pure water, so as to obtain the removal surface hair
The rectifier bridge product of yellow part.
2. the method according to claim 1 for removing rectifier bridge electroplating matt tin surfaces jaundice part, it is characterised in that institute
State in step S1, the volumetric concentration of the pyrovinic acid solution is 15%-20%, and soak time is 2.5-3.5min.
3. the method according to claim 1 for removing rectifier bridge electroplating matt tin surfaces jaundice part, it is characterised in that institute
State in step S2, washing for the first time uses pure water rinsing, and washing time is 13-17s.
4. the method according to claim 1 for removing rectifier bridge electroplating matt tin surfaces jaundice part, it is characterised in that institute
State in step S3, the concentration of the trisodium phosphate solution is 28-32g/L, and the temperature of neutralisation treatment is 55-65 DEG C, neutralisation treatment
Time be 55-65s.
5. the method according to claim 1 for removing rectifier bridge electroplating matt tin surfaces jaundice part, it is characterised in that institute
State in step S4, second of washing is rinsed using running water, and washing time is 13-17s.
6. the method according to claim 1 for removing rectifier bridge electroplating matt tin surfaces jaundice part, it is characterised in that institute
State in step S5, the washing time that ultrasonic pure water is washed is 55-65s.
7. the method according to claim 1 for removing rectifier bridge electroplating matt tin surfaces jaundice part, it is characterised in that institute
State in step S6, dewater treatment is carried out using industrial level isopropanol, the time of dewater treatment is 8-12s.
8. the method for removing rectifier bridge electroplating matt tin surfaces jaundice part according to any one of claim 1-7, its
It is characterised by, in addition to：Step S7, the rectifier bridge product Jing Guo dewater treatment is toasted.
9. the method according to claim 8 for removing rectifier bridge electroplating matt tin surfaces jaundice part, it is characterised in that institute
State in step S7, the temperature of baking is 45-55 DEG C, the time of baking is 28-32min.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710396018.1A CN107245743A (en) | 2017-05-31 | 2017-05-31 | A kind of method for removing rectifier bridge electroplating matt tin surfaces jaundice part |
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| CN201710396018.1A CN107245743A (en) | 2017-05-31 | 2017-05-31 | A kind of method for removing rectifier bridge electroplating matt tin surfaces jaundice part |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108396350A (en) * | 2018-03-20 | 2018-08-14 | 粟飞 | Dehydrating agent after a kind of plating |
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