CN106435677A - Electroplating pretreatment technology for components of automobiles - Google Patents
Electroplating pretreatment technology for components of automobiles Download PDFInfo
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- CN106435677A CN106435677A CN201611071080.5A CN201611071080A CN106435677A CN 106435677 A CN106435677 A CN 106435677A CN 201611071080 A CN201611071080 A CN 201611071080A CN 106435677 A CN106435677 A CN 106435677A
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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
- C25D5/34—Pretreatment of metallic surfaces to be electroplated
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Abstract
The invention relates to an electroplating pretreatment technology for components of automobiles. The electroplating pretreatment technology includes seven working procedures of oil removing, roughening, reduction, pre-impregnation, activation, dispergation and chemical nickel plating. An electrolysis working procedure is additionally carried out between the reduction working procedure and the pre-impregnation working procedure. The electroplating pretreatment technology particularly includes that graphite electrodes are mounted at two edges of a pre-impregnation tank, constant-current electrolysis is carried out by the aid of electrolysis currents of 1.5-2.5 A at the normal temperature for the electrolysis time of 100-160 S, and electrolyte is aqueous hydrochloric acid solution with the molar concentration of 165-175 ml/L. The electroplating pretreatment technology for the components of the automobiles has the advantages that the electrolysis working procedure is additionally carried out between the reduction working procedure and the pre-impregnation working procedure, accordingly, hydrochloric acid pre-impregnation activation effects can be improved, and preparation can be provided for depositing palladium in the follow-up palladium activation working procedure; the activation capacity can be greatly improved after electrolysis activation is additionally carried out, and undesirable phenomena such as base exposure can be basically prevented; small plating can be completely removed by improved pre-impregnation tank sites, and burr defects can be reduced.
Description
Technical field
The invention belongs to electroplating technology field, more particularly to a kind of auto parts and components electroplating pretreatment process.
Background technology
Plating is exactly the process for plating other metal or alloy of a thin layer using electrolysis principle on substrate material surface, is
Make the technique of the surface attachment layer of metal film of metal or other materials product prevent metal oxygen so as to play using electrolysis
Change（As corrosion）, improve wearability, electric conductivity, reflective, corrosion resistance（Sour sulfur copper etc.）And the effect such as having improved aesthetic appearance.
Wherein, pre-treatment is the important procedure of plating, and existing pre-treatment includes oil removing, roughening, reduction, preimpregnation, activation, dispergation
With seven operations of chemical nickel plating；The pre- immersion trough of hydrochloric acid is not all installed graphite electrode and is electrolysed at present, and product is going to hydrochloric acid preimpregnation
When more or less can by some vapor sorption of in the air, cannot activate put in place on the basis of enter palladium activated bath position, so as to
Formed show-through etc. bad, and some on hanger little do not move back clean coating, cannot remove in preimpregnation, cause in copper facing
Buildup is formed, produces burr bad.
Therefore, research and development are a kind of can improve activation effect and reduce the bad auto parts and components electroplating pretreatment process of burr
It is necessary.
Content of the invention
The technical problem to be solved in the present invention is that offer is a kind of can be improved activation effect and reduce the bad automobile of burr
Parts electroplating pretreatment process.
For solving above-mentioned technical problem, the technical scheme is that：A kind of auto parts and components electroplating pretreatment process, bag
Oil removing, roughening, reduction, preimpregnation, activation, dispergation and seven operations of chemical nickel plating are included, its innovative point is：In the reduction and in advance
Increasing electrowinning process between leaching operation, specially graphite electrode is respectively mounted on pre- immersion trough both sides, carries out current stabilization electrolysis, adopted
Electrolyte be the aqueous hydrochloric acid solution that molar concentration is 165～175ml/L, temperature be room temperature, the electric current of electrolysis be 1.5～
2.5A, electrolysis time is 100～160S.
Further, described electrolysis, the electrolyte for being adopted is the aqueous hydrochloric acid solution of 170ml/L for molar concentration, temperature
Spend for room temperature, the electric current of electrolysis is 2.0A, electrolysis time be.
It is an advantage of the current invention that：Auto parts and components electroplating pretreatment process of the present invention, is reducing and preimpregnation operation between
Increasing electrowinning process, current stabilization electrolysis is carried out when there is hanger to enter cylinder, can increase the activation effect of hydrochloric acid preimpregnation, is that following palladium is lived
In chemical industry sequence, the deposition of palladium provides place mat；Before graphite electrode electrolysis is not installed, product is how many when hydrochloric acid preimpregnation is gone to
I haven't seen you for ages by some vapor sorption of in the air, cannot activate put in place on the basis of enter palladium activated bath position, show-through so as to be formed
Etc. bad, after increasing electrolysis, activation, activation capacity is greatly increased, and the phenomenon disappears substantially；And the pre- immersion trough position after improving can
To remove little coating completely, reduce the bad appearance of burr.
Specific embodiment
The following examples can make professional and technical personnel that the present invention is more fully understood, but not therefore by this
Bright it is limited among described scope of embodiments.
Embodiment 1
The present embodiment auto parts and components electroplating pretreatment process, the handling process is comprised the following steps that：
（1）Oil removing：Ultrasonic degreasing is carried out to the surface of automobile part of injection mo(u)lding, the ultrasonic degreasing is 8g/L using concentration
Degreasing powder, except oil temperature be 70 DEG C, oil removing time 4min；Then washed, then pass through soak with sulphuric acid, the sulphuric acid dense
Spend for 100ml/L, soak time be；
（2）Roughening：Auto parts and components after oil removing are sent into roughening liquid bath carries out roughening treatment, places in rinse bath and uses pure water
Hydro-peening, finally sending in high-order washing pool carries out high-order washing；The Coarsening Temperature is 60 DEG C, and coarsening time is 6min, described
In roughening liquid bath, coarsening solution is the mixed liquor of the chromic acid with the sulphuric acid of concentration 420g/L of concentration 410g/L；
（3）Reduction：Auto parts and components after roughening are sent in reduction cell carries out reduction treatment, is put in rinse bath and uses after process
Pure water rinsing, include in reduction cell concentration for the reducing agent of 20ml/L and concentration for 65ml/L hydrochloric acid, the recovery time be；
（4）Electrolysis：Graphite electrode is respectively mounted on pre- immersion trough both sides, current stabilization electrolysis is carried out, the electrolyte for being adopted is mole dense
The aqueous hydrochloric acid solution for 165ml/L is spent, it is 2.5A that temperature is the electric current of room temperature, electrolysis, electrolysis time is 160S；
（5）Preimpregnation：Auto parts and components after electrolysis is processed are sent in pre- immersion trough and are presoaked, and the prepreg solution in pre- immersion trough is
The hydrochloric acid of 100 ml/L, temperature is room temperature, presoaks time 3min；
（6）Activation：Auto parts and components after preimpregnation are sent into activated bath carries out activation processing, is put in rinse bath with pure after process
Water is rinsed, and the activating solution in activated bath is the hydrochloric acid of concentration 200ml/L, concentration is the Metal Palladium of 28ppm and concentration is 3 g/L
The mixed liquor of stannous chloride, temperature is 24 DEG C, soak time 3min；
（7）Dispergation：Auto parts and components after activation processing are sent into solution glue groove carries out dispergation process, is put in rinse bath after process
With pure water rinsing, it is the solution glue of 200ml/L for concentration to solve glue groove interior, and temperature is 45 DEG C, dispergation time 4min；
（8）Chemical nickel plating：Plating solution is the Ni-5A of concentration 40ml/L, pH value 8.4,36 DEG C of temperature, time 12min.
Embodiment 2
The present embodiment auto parts and components electroplating pretreatment process, the handling process is comprised the following steps that：
（1）Oil removing：Ultrasonic degreasing is carried out to the surface of automobile part of injection mo(u)lding, the ultrasonic degreasing is 10g/ using concentration
The degreasing powder of L, except oil temperature is 60 DEG C, oil removing time 2min；Then washed, then passed through soak with sulphuric acid, the sulphuric acid
Concentration is 120ml/L, and soak time is 1min；
（2）Roughening：Auto parts and components after oil removing are sent into roughening liquid bath carries out roughening treatment, places in rinse bath and uses pure water
Hydro-peening, finally sending in high-order washing pool carries out high-order washing；The Coarsening Temperature is 70 DEG C, and coarsening time is 4min, described
In roughening liquid bath, coarsening solution is the mixed liquor of the chromic acid with the sulphuric acid of concentration 400g/L of concentration 430g/L；
（3）Reduction：Auto parts and components after roughening are sent in reduction cell carries out reduction treatment, is put in rinse bath and uses after process
Pure water rinsing, include in reduction cell concentration for the reducing agent of 25ml/L and concentration for 75ml/L hydrochloric acid, the recovery time be；
（4）Electrolysis：Graphite electrode is respectively mounted on pre- immersion trough both sides, current stabilization electrolysis is carried out, the electrolyte for being adopted is mole dense
The aqueous hydrochloric acid solution for 175ml/L is spent, it is 1.5A that temperature is the electric current of room temperature, electrolysis, electrolysis time is 100S；
（5）Preimpregnation：Auto parts and components after electrolysis is processed are sent in pre- immersion trough and are presoaked, and the prepreg solution in pre- immersion trough is
The hydrochloric acid of 200 ml/L, temperature is room temperature, presoaks time 2min；
（6）Activation：Auto parts and components after preimpregnation are sent into activated bath carries out activation processing, is put in rinse bath with pure after process
Water is rinsed, and the activating solution in activated bath is the hydrochloric acid of concentration 250ml/L, concentration is the Metal Palladium of 30ppm and concentration is 4 g/L
The mixed liquor of stannous chloride, temperature is 32 DEG C, soak time 1min；
（7）Dispergation：Auto parts and components after activation processing are sent into solution glue groove carries out dispergation process, is put in rinse bath after process
With pure water rinsing, it is the solution glue of 250ml/L for concentration to solve glue groove interior, and temperature is 50 DEG C, dispergation time 2min；
（8）Chemical nickel plating：Plating solution is the Ni-5A of concentration 45ml/L, pH value 9.1,42 DEG C of temperature, time 8min.
Embodiment 3
The present embodiment auto parts and components electroplating pretreatment process, the handling process is comprised the following steps that：
（1）Oil removing：Ultrasonic degreasing is carried out to the surface of automobile part of injection mo(u)lding, the ultrasonic degreasing is 9g/L using concentration
Degreasing powder, except oil temperature be 65 DEG C, oil removing time 3min；Then washed, then pass through soak with sulphuric acid, the sulphuric acid dense
Spend for 110ml/L, soak time be；
（2）Roughening：Auto parts and components after oil removing are sent into roughening liquid bath carries out roughening treatment, places in rinse bath and uses pure water
Hydro-peening, finally sending in high-order washing pool carries out high-order washing；The Coarsening Temperature is 65 DEG C, and coarsening time is 5min, described
In roughening liquid bath, coarsening solution is the mixed liquor of the chromic acid with the sulphuric acid of concentration 410g/L of concentration 420g/L；
（3）Reduction：Auto parts and components after roughening are sent in reduction cell carries out reduction treatment, is put in rinse bath and uses after process
Pure water rinsing, include in reduction cell concentration for the reducing agent of 22.5ml/L and concentration for 70ml/L hydrochloric acid, the recovery time is
2min；
（4）Electrolysis：Graphite electrode is respectively mounted on pre- immersion trough both sides, current stabilization electrolysis is carried out, the electrolyte for being adopted is mole dense
The aqueous hydrochloric acid solution for 170ml/L is spent, it is 2A that temperature is the electric current of room temperature, electrolysis, electrolysis time is 130S；
（5）Preimpregnation：Auto parts and components after electrolysis is processed are sent in pre- immersion trough and are presoaked, and the prepreg solution in pre- immersion trough is
The hydrochloric acid of 150 ml/L, temperature is room temperature, presoaks time 2.5min；
（6）Activation：Auto parts and components after preimpregnation are sent into activated bath carries out activation processing, is put in rinse bath with pure after process
Water is rinsed, the activating solution in activated bath is the hydrochloric acid of concentration 225ml/L, concentration for the Metal Palladium of 29ppm and concentration be
Stannous chloride mixed liquor, temperature be 28 DEG C, soak time 2min；
（7）Dispergation：Auto parts and components after activation processing are sent into solution glue groove carries out dispergation process, is put in rinse bath after process
With pure water rinsing, it is the solution glue of 225ml/L for concentration to solve glue groove interior, and temperature is 47.5 DEG C, dispergation time 3min；
（8）Chemical nickel plating：Plating solution is the Ni-5A of concentration 42.5ml/L, pH value 8.75,39 DEG C of temperature, time 10min.
Comparative example
The present embodiment auto parts and components electroplating pretreatment process, the handling process is comprised the following steps that：
（1）Oil removing：Ultrasonic degreasing is carried out to the surface of automobile part of injection mo(u)lding, the ultrasonic degreasing is 9g/L using concentration
Degreasing powder, except oil temperature be 65 DEG C, oil removing time 3min；Then washed, then pass through soak with sulphuric acid, the sulphuric acid dense
Spend for 110ml/L, soak time be；
（2）Roughening：Auto parts and components after oil removing are sent into roughening liquid bath carries out roughening treatment, places in rinse bath and uses pure water
Hydro-peening, finally sending in high-order washing pool carries out high-order washing；The Coarsening Temperature is 65 DEG C, and coarsening time is 5min, described
In roughening liquid bath, coarsening solution is the mixed liquor of the chromic acid with the sulphuric acid of concentration 410g/L of concentration 420g/L；
（3）Reduction：Auto parts and components after roughening are sent in reduction cell carries out reduction treatment, is put in rinse bath and uses after process
Pure water rinsing, include in reduction cell concentration for the reducing agent of 22.5ml/L and concentration for 70ml/L hydrochloric acid, the recovery time is
2min；
（4）Electrolysis：Graphite electrode is respectively mounted on pre- immersion trough both sides, current stabilization electrolysis is carried out, the electrolyte for being adopted is mole dense
The aqueous hydrochloric acid solution for 170ml/L is spent, it is 2A that temperature is the electric current of room temperature, electrolysis, electrolysis time is 130S；
（5）Preimpregnation：Auto parts and components after electrolysis is processed are sent in pre- immersion trough and are presoaked, and the prepreg solution in pre- immersion trough is
The hydrochloric acid of 150 ml/L, temperature is room temperature, presoaks time 2.5min；
（6）Activation：Auto parts and components after preimpregnation are sent into activated bath carries out activation processing, is put in rinse bath with pure after process
Water is rinsed, the activating solution in activated bath is the hydrochloric acid of concentration 225ml/L, concentration for the Metal Palladium of 29ppm and concentration be
Stannous chloride mixed liquor, temperature be 28 DEG C, soak time 2min；
（7）Dispergation：Auto parts and components after activation processing are sent into solution glue groove carries out dispergation process, is put in rinse bath after process
With pure water rinsing, it is the solution glue of 225ml/L for concentration to solve glue groove interior, and temperature is 47.5 DEG C, dispergation time 3min；
（8）Chemical nickel plating：Plating solution is the Ni-5A of concentration 42.5ml/L, pH value 8.75,39 DEG C of temperature, time 10min.
1～3 auto parts and components electroplating pretreatment process of embodiment, compared with comparative example, is reducing and preimpregnation operation between
Increasing electrowinning process, current stabilization electrolysis is carried out when there is hanger to enter cylinder, can increase the activation effect of hydrochloric acid preimpregnation, is that following palladium is lived
In chemical industry sequence, the deposition of palladium provides place mat；Before graphite electrode electrolysis is not installed, product is how many when hydrochloric acid preimpregnation is gone to
I haven't seen you for ages by some vapor sorption of in the air, cannot activate put in place on the basis of enter palladium activated bath position, show-through so as to be formed
Etc. bad, after increasing electrolysis, activation, activation capacity is greatly increased, and the phenomenon disappears substantially；And the pre- immersion trough position after improving can
To remove little coating completely, reduce the bad appearance of burr.
Ultimate principle and principal character and the advantages of the present invention of the present invention has been shown and described above.The skill of the industry
Simply explanation of the art personnel it should be appreciated that the present invention is not restricted to the described embodiments, described in above-described embodiment and description
The principle of the present invention, without departing from the spirit and scope of the present invention, the present invention also has various changes and modifications, these
Changes and improvements are both fallen within scope of the claimed invention.The claimed scope of the invention by appending claims and
Its equivalent thereof.
Claims (2)
1. a kind of auto parts and components electroplating pretreatment process, including oil removing, roughening, reduction, preimpregnation, activation, dispergation and chemical plating
Seven operations of nickel, it is characterised in that：Increase electrowinning process between the reduction and preimpregnation operation, specially on pre- immersion trough both sides
Graphite electrode is respectively mounted, current stabilization electrolysis is carried out, the electrolyte for being adopted is hydrochloric acid water that molar concentration is 165～175ml/L
Solution, it is 1.5～2.5A that temperature is the electric current of room temperature, electrolysis, and electrolysis time is 100～160S.
2. auto parts and components electroplating pretreatment process according to claim 1, it is characterised in that：Described electrolysis, is adopted
Electrolyte is the aqueous hydrochloric acid solution that molar concentration is 170ml/L, and it is 2.0A that temperature is the electric current of room temperature, electrolysis, during electrolysis
Between be 130S.
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| CN201611071080.5A CN106435677A (en) | 2016-11-29 | 2016-11-29 | Electroplating pretreatment technology for components of automobiles |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109811381A (en) * | 2019-03-26 | 2019-05-28 | 阳江三威科技有限公司 | Pre-impregnation device is electroplated in plastic parts electro-plating method and plastic parts |
| CN111501075A (en) * | 2020-05-06 | 2020-08-07 | 清远敏惠汽车零部件有限公司 | Plastic electroplating pretreatment process |
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| CN101043077A (en) * | 2006-03-24 | 2007-09-26 | 中国科学院大连化学物理研究所 | Application of polyporous material in sodium polysulfide/bromine accumulation energy power cell electric pole |
| CN101413122A (en) * | 2007-10-17 | 2009-04-22 | 比亚迪股份有限公司 | Surface treating method of aluminum alloy material |
| CN102802364A (en) * | 2012-09-11 | 2012-11-28 | 岳长来 | Method for arranging metal palladium layer in conducting layer of printed circuit board and layered structure thereof |
| CN103290447A (en) * | 2013-05-30 | 2013-09-11 | 延康汽车零部件如皋有限公司 | Pre-copper plating second-order up-flowing process |
| CN105951142A (en) * | 2016-05-19 | 2016-09-21 | 南通柏源汽车零部件有限公司 | Pretreatment technology for electroplating of automobile door handle |
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2016
- 2016-11-29 CN CN201611071080.5A patent/CN106435677A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101043077A (en) * | 2006-03-24 | 2007-09-26 | 中国科学院大连化学物理研究所 | Application of polyporous material in sodium polysulfide/bromine accumulation energy power cell electric pole |
| CN101413122A (en) * | 2007-10-17 | 2009-04-22 | 比亚迪股份有限公司 | Surface treating method of aluminum alloy material |
| CN102802364A (en) * | 2012-09-11 | 2012-11-28 | 岳长来 | Method for arranging metal palladium layer in conducting layer of printed circuit board and layered structure thereof |
| CN103290447A (en) * | 2013-05-30 | 2013-09-11 | 延康汽车零部件如皋有限公司 | Pre-copper plating second-order up-flowing process |
| CN105951142A (en) * | 2016-05-19 | 2016-09-21 | 南通柏源汽车零部件有限公司 | Pretreatment technology for electroplating of automobile door handle |
Non-Patent Citations (1)
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109811381A (en) * | 2019-03-26 | 2019-05-28 | 阳江三威科技有限公司 | Pre-impregnation device is electroplated in plastic parts electro-plating method and plastic parts |
| CN111501075A (en) * | 2020-05-06 | 2020-08-07 | 清远敏惠汽车零部件有限公司 | Plastic electroplating pretreatment process |
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Application publication date: 20170222 |