CN106757240A - A kind of pre-treating technology of automobile external part plating - Google Patents
A kind of pre-treating technology of automobile external part plating Download PDFInfo
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- CN106757240A CN106757240A CN201611077179.6A CN201611077179A CN106757240A CN 106757240 A CN106757240 A CN 106757240A CN 201611077179 A CN201611077179 A CN 201611077179A CN 106757240 A CN106757240 A CN 106757240A
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- roughening
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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
- C25D5/54—Electroplating of non-metallic surfaces
- C25D5/56—Electroplating of non-metallic surfaces of plastics
-
- 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
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/18—Pretreatment of the material to be coated
- C23C18/20—Pretreatment of the material to be coated of organic surfaces, e.g. resins
- C23C18/22—Roughening, e.g. by etching
- C23C18/24—Roughening, e.g. by etching using acid aqueous 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
- 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
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/18—Pretreatment of the material to be coated
- C23C18/20—Pretreatment of the material to be coated of organic surfaces, e.g. resins
- C23C18/28—Sensitising or activating
- C23C18/285—Sensitising or activating with tin based compound or composition
-
- 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
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/18—Pretreatment of the material to be coated
- C23C18/20—Pretreatment of the material to be coated of organic surfaces, e.g. resins
- C23C18/28—Sensitising or activating
- C23C18/30—Activating or accelerating or sensitising with palladium or other noble metal
-
- 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
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/31—Coating with metals
- C23C18/32—Coating with nickel, cobalt or mixtures thereof with phosphorus or boron
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Electrochemistry (AREA)
- Chemically Coating (AREA)
- Electroplating Methods And Accessories (AREA)
Abstract
The present invention relates to a kind of pre-treating technology of automobile external part plating, the pre-treating technology includes oil removing, roughening, reduction, preimpregnation, activation, seven operations of dispergation and chemical nickel plating, wherein, the roughening uses secondary roughening, and lifts roughening concentration, goes back original content and preimpregnation concentration；And activating solution is using the mixed liquor of hydrochloric acid, Metal Palladium and stannous chloride.The advantage of the invention is that：The activating process that the pre-treating technology solves existing pre-electroplating treatment easily corrodes base material, have a strong impact on the problem that the appearance and adhesive force and service life of plating shorten, ensure that automobile external part possesses good adhesive force in electroplating processes, vapour exterior part is set to show fabulous metal-like after electroplating, appearance is improved, while not resulting in the shortening of service life.
Description
Technical field
The invention belongs to electroplating technology field, more particularly to a kind of pre-treating technology of automobile external part plating.
Background technology
Plating is exactly the process for plating other metal or alloy of a thin layer on substrate material surface using electrolysis principle, is
Make the technique of the surface attachment layer of metal film of metal or other materials product using electrolysis prevents metal oxygen so as to play
Change (such as corrosion), improve the effect such as wearability, electric conductivity, reflective, corrosion resistance (sour sulphur copper etc.) and having improved aesthetic appearance.
Automobile external part is made up of with the door lock cover lid with handle a handle and one, and the two parts are together
The outer exterior part of formed automobile., it is necessary to electroplate automobile external part in the production of automobile external part, it is frequently necessary to carry out before plating
Pre-treatment, existing pre-treating technology includes oil removing, roughening, reduction, preimpregnation, quick China, activation, dispergation and step etc. chemical plating,
Wherein, conventional roughening treatment is a roughening treatment, and the activating solution component that activating process is used is nitric acid 300-700ml/L,
Activation temperature is normal temperature, and soak time is 30-60s, and nitric acid can corrode plating piece in the process causes plating piece to turn to be yellow, and has a strong impact on
The appearance and adhesive force of plating and reduction of service life.
Based on problem above, there is provided a kind of pre-treating technology skill of automobile external part plating, locate before having solved existing plating
Science and engineering skill easily corrodes base material, has a strong impact on the appearance and adhesive force of plating, while not resulting in the shortening of service life
Problem.
The content of the invention
Regarding to the issue above, it is an object of the invention to provide a kind of pre-treating technology of automobile external part plating.
The present invention is achieved by the following technical solutions：
A kind of pre-treating technology of automobile external part plating, the pre-treating technology include oil removing, roughening, reduction, preimpregnation,
Activation, seven operations of dispergation and chemical nickel plating, the roughening use secondary roughening, and lift roughening concentration, go back original content and pre-
Leaching concentration, and activating solution is using the mixed liquor of hydrochloric acid, Metal Palladium and stannous chloride.
Further limit：The pre-treating technology is comprised the following steps that：
Oil removing：Carry out ultrasonic degreasing to the automobile external part surface of injection moulding, the ultrasonic degreasing use concentration for 5~
The degreasing powder of 7g/L, except oil temperature is 50~55 DEG C, 3~5min of oil removing time；Then four washings are carried out, then is soaked by sulfuric acid
Bubble, the concentration of the sulfuric acid is 110~120ml/L, and soak time is 2~3min；
Roughening：Automobile external part feeding first after oil removing is roughened into liquid bath carries out a roughening treatment, is then fed into the
Two roughening liquid baths carry out secondary roughening treatment, place into rinse bath and use pure water hydro-peening, and finally sending into high-order washing pool is carried out
High position washing；Coarsening Temperature is 65~75 DEG C, and coarsening time is 4~5min；The secondary Coarsening Temperature be 65~
70 DEG C, coarsening time is 9~13min；
Reduction：Reduction treatment will be carried out in automobile external part feeding reduction cell after roughening, be put into rinse bath after treatment
With pure water rinsing, including the hydrochloric acid that reducing agent and concentration that concentration is 22~28ml/L are 65~73ml/L in reduction cell, reduction
Time is 2~3min；
Preimpregnation：Automobile external part after reduction treatment is sent into pre- immersion trough and is presoaked, the prepreg solution in pre- immersion trough is
The hydrochloric acid of 150~200ml/L, temperature is room temperature, presoaks 2~4min of the time；
Activation：Automobile external part feeding activated bath after preimpregnation is carried out into activation process, is put into after treatment in rinse bath and used
Pure water rinsing, temperature is 24~30 DEG C, 2~3min of soak time；
Dispergation：Automobile external part feeding solution glue groove after activation process is carried out into dispergation treatment, rinse bath is put into after treatment
Interior use pure water rinsing, is the solution glue that concentration is 200~230ml/L in solution glue groove, and temperature is 45~56 DEG C, the dispergation time 2~
4min；
Chemical nickel plating：Plating solution for 40~45ml/L of concentration Ni-5A, pH value 8~8.5,35~40 DEG C of temperature, the time 7~
13min。
Further limit：Coarsening solution is the chromium of 400~420g/L of concentration in the first roughening liquid bath in the step roughening
The mixed liquor of the sulfuric acid of acid and 410~430g/L of concentration, coarsening solution is the chromic acid of 400~420g/L of concentration in the second roughening liquid bath
With the mixed liquor of the sulfuric acid of 390~410g/L of concentration.
Further limit：Activating solution in step activation in activated bath is the hydrochloric acid, dense of 250~270ml/L of concentration
It is the mixed liquor of the stannous chloride that the Metal Palladium and concentration of 25~30ppm are 3~4g/L to spend.
The advantage of the invention is that：A kind of pre-treating technology of automobile external part plating of the present invention, at the roughening of the technique
Manage and compared in prior art, change once roughening to be roughened twice, and then it is more abundant to treat the surface dissolving of plated product；Meanwhile,
Compared with prior art, activating solution uses the mixed liquor of hydrochloric acid, Metal Palladium and stannous chloride, Bu Huiyu to the activation process of the technique
Base material reacts, and product surface easily corrodes base material without powder phenomenon, the activating process for solving existing pre-electroplating treatment is played, sternly
Ghost image rings the appearance and adhesive force and the short problem of service life of plating, it is ensured that automobile external part is gathered around in electroplating processes
There is good adhesive force, meanwhile, the outward appearance of cleaning is provided for follow-up electroplating processes, automobile external part is showed after electroplating fabulous
Metal-like, appearance is improved, while not resulting in the shortening of service life.
Specific embodiment
The following examples can make professional and technical personnel that the present invention is more fully understood, but therefore not send out this
It is bright to be limited among described scope of embodiments.
Embodiment 1
A kind of pre-treating technology of automobile external part plating, comprises the following steps：
Oil removing：Automobile external part surface to injection moulding carries out ultrasonic degreasing, and it is 5g/L's that ultrasonic degreasing uses concentration
Degreasing powder, except oil temperature is 50 DEG C, oil removing time 3min；Then four washings are carried out, then is soaked by sulfuric acid, the concentration of sulfuric acid
It is 110ml/L, soak time is 2min；
Roughening：Automobile external part feeding first after oil removing is roughened into liquid bath carries out a roughening treatment, is then fed into the
Two roughening liquid baths carry out secondary roughening treatment, place into rinse bath and use pure water hydro-peening, and finally sending into high-order washing pool is carried out
High position washing；One time Coarsening Temperature is 65 DEG C, and coarsening time is 4min；Secondary Coarsening Temperature is 65 DEG C, and coarsening time is 9min；
Reduction：Reduction treatment will be carried out in automobile external part feeding reduction cell after roughening, be put into rinse bath after treatment
With pure water rinsing, including concentration for the reducing agent and concentration of 22ml/L are the hydrochloric acid of 65ml/L in reduction cell, the recovery time is
2min；
Preimpregnation：Automobile external part after reduction treatment is sent into pre- immersion trough and is presoaked, the prepreg solution in pre- immersion trough is
The hydrochloric acid of 150ml/L, temperature is room temperature, presoaks time 2min；
Activation：Automobile external part feeding activated bath after preimpregnation is carried out into activation process, is put into after treatment in rinse bath and used
Pure water rinsing, temperature is 24 DEG C, soak time 2min；
Dispergation：Automobile external part feeding solution glue groove after activation process is carried out into dispergation treatment, rinse bath is put into after treatment
Interior use pure water rinsing, for concentration is the solution glue of 200ml/L in solution glue groove, temperature is 45 DEG C, dispergation time 2min；
Chemical nickel plating：Plating solution is the Ni-5A of concentration 40ml/L, pH value 8,35 DEG C of temperature, time 7min.
Preferably：Coarsening solution is the chromic acid and concentration 410g/L of concentration 400g/L in the first roughening liquid bath in step roughening
Sulfuric acid mixed liquor, coarsening solution is the mixing of the sulfuric acid of chromic acid and the concentration 390g/L of concentration 400g/L in the second roughening liquid bath
Liquid.
Preferably：The gold that activating solution in step activation in activated bath is the hydrochloric acid of concentration 250ml/L, concentration is 25ppm
Category palladium and concentration are the mixed liquor of the stannous chloride of 3g/L.
Embodiment 2
A kind of pre-treating technology of automobile external part plating, comprises the following steps：
Oil removing：Automobile external part surface to injection moulding carries out ultrasonic degreasing, and it is 6g/L's that ultrasonic degreasing uses concentration
Degreasing powder, except oil temperature is 52 DEG C, oil removing time 4min；Then four washings are carried out, then is soaked by sulfuric acid, the concentration of sulfuric acid
It is 115ml/L, soak time is 2min；
Roughening：Automobile external part feeding first after oil removing is roughened into liquid bath carries out a roughening treatment, is then fed into the
Two roughening liquid baths carry out secondary roughening treatment, place into rinse bath and use pure water hydro-peening, and finally sending into high-order washing pool is carried out
High position washing；One time Coarsening Temperature is 70 DEG C, and coarsening time is 4.5min；Secondary Coarsening Temperature is 68 DEG C, and coarsening time is
11min；
Reduction：Reduction treatment will be carried out in automobile external part feeding reduction cell after roughening, be put into rinse bath after treatment
With pure water rinsing, including concentration for the reducing agent and concentration of 25ml/L are the hydrochloric acid of 70ml/L in reduction cell, the recovery time is
2.5min；
Preimpregnation：Automobile external part after reduction treatment is sent into pre- immersion trough and is presoaked, the prepreg solution in pre- immersion trough is
The hydrochloric acid of 180ml/L, temperature is room temperature, presoaks time 3min；
Activation：Automobile external part feeding activated bath after preimpregnation is carried out into activation process, is put into after treatment in rinse bath and used
Pure water rinsing, temperature is 27 DEG C, soak time 2.5min；
Dispergation：Automobile external part feeding solution glue groove after activation process is carried out into dispergation treatment, rinse bath is put into after treatment
Interior use pure water rinsing, for concentration is the solution glue of 215ml/L in solution glue groove, temperature is 50 DEG C, dispergation time 3min；
Chemical nickel plating：Plating solution is the Ni-5A of concentration 42ml/L, pH value 8.2,38 DEG C of temperature, time 10min.
Preferably：Coarsening solution is the chromic acid and concentration 420g/L of concentration 410g/L in the first roughening liquid bath in step roughening
Sulfuric acid mixed liquor, coarsening solution is the mixing of the sulfuric acid of chromic acid and the concentration 400g/L of concentration 410g/L in the second roughening liquid bath
Liquid.
Preferably：The metal that activating solution in step activation in activated bath is the hydrochloric acid of concentration 260ml/L, concentration is 7ppm
Palladium and concentration are the mixed liquor of the stannous chloride of 3.5g/L.
Embodiment 3
Oil removing：Automobile external part surface to injection moulding carries out ultrasonic degreasing, and it is 7g/L's that ultrasonic degreasing uses concentration
Degreasing powder, except oil temperature is 55 DEG C, oil removing time 5min；Then four washings are carried out, then is soaked by sulfuric acid, the concentration of sulfuric acid
It is 120ml/L, soak time is 3min；
Roughening：Automobile external part feeding first after oil removing is roughened into liquid bath carries out a roughening treatment, is then fed into the
Two roughening liquid baths carry out secondary roughening treatment, place into rinse bath and use pure water hydro-peening, and finally sending into high-order washing pool is carried out
High position washing；One time Coarsening Temperature is 75 DEG C, and coarsening time is 5min；Secondary Coarsening Temperature is 70 DEG C, and coarsening time is
13min；
Reduction：Reduction treatment will be carried out in automobile external part feeding reduction cell after roughening, be put into rinse bath after treatment
With pure water rinsing, including concentration for the reducing agent and concentration of 28ml/L are the hydrochloric acid of 73ml/L in reduction cell, the recovery time is
3min；
Preimpregnation：Automobile external part after reduction treatment is sent into pre- immersion trough and is presoaked, the prepreg solution in pre- immersion trough is
The hydrochloric acid of 200ml/L, temperature is room temperature, presoaks time 4min；
Activation：Automobile external part feeding activated bath after preimpregnation is carried out into activation process, is put into after treatment in rinse bath and used
Pure water rinsing, temperature is 30 DEG C, soak time 3min；
Dispergation：Automobile external part feeding solution glue groove after activation process is carried out into dispergation treatment, rinse bath is put into after treatment
Interior use pure water rinsing, for concentration is the solution glue of 230ml/L in solution glue groove, temperature is 56 DEG C, dispergation time 4min；
Chemical nickel plating：Plating solution is the Ni-5A of concentration 45ml/L, pH value 8.5,40 DEG C of temperature, time 13min.
Further limit：Coarsening solution is the chromic acid and concentration of concentration 420g/L in the first roughening liquid bath in step roughening
The mixed liquor of the sulfuric acid of 430g/L, coarsening solution is the chromic acid of concentration 420g/L and the sulfuric acid of concentration 410g/L in the second roughening liquid bath
Mixed liquor.
Further limit：Activating solution in step activation in activated bath is the hydrochloric acid of concentration 270ml/L, concentration is 30ppm
Metal Palladium and concentration for 4g/L stannous chloride mixed liquor.
General principle of the invention and principal character and advantages of the present invention has been shown and described above.The skill of the industry
Art personnel it should be appreciated that the present invention is not limited to the above embodiments, the simply explanation described in above-described embodiment and specification
Principle of the invention, without departing from the spirit and scope of the present invention, various changes and modifications of the present invention are possible, these
Changes and improvements all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appending claims and
Its equivalent thereof.
Claims (4)
1. a kind of pre-treating technology that automobile external part is electroplated, the pre-treating technology includes oil removing, roughening, reduction, preimpregnation, work
Change, seven operations of dispergation and chemical nickel plating, it is characterised in that：The roughening uses secondary roughening, and lifts roughening concentration, reduction
Concentration and preimpregnation concentration, and activating solution is using the mixed liquor of hydrochloric acid, Metal Palladium and stannous chloride.
2. the pre-treating technology that a kind of automobile external part according to claim 1 is electroplated, it is characterised in that：The pre-treatment
Technique is comprised the following steps that：
Oil removing：Automobile external part surface to injection moulding carries out ultrasonic degreasing, and it is 5~7g/L that the ultrasonic degreasing uses concentration
Degreasing powder, except oil temperature be 50~55 DEG C, 3~5min of oil removing time；Then four washings are carried out, then are soaked by sulfuric acid,
The concentration of the sulfuric acid is 110~120ml/L, and soak time is 2~3min；
Roughening：Automobile external part feeding first after oil removing is roughened into liquid bath carries out a roughening treatment, is then fed into second thick
Changing liquid bath carries out secondary roughening treatment, places into rinse bath and uses pure water hydro-peening, and finally sending into high-order washing pool carries out a high position
Washing；Coarsening Temperature is 65~75 DEG C, and coarsening time is 4~5min；The secondary Coarsening Temperature is 65~70 DEG C,
Coarsening time is 9~13min；
Reduction：Reduction treatment will be carried out in automobile external part feeding reduction cell after roughening, be put into after treatment in rinse bath with pure
Water is rinsed, including the hydrochloric acid that reducing agent and concentration that concentration is 22~28ml/L are 65~73ml/L, recovery time in reduction cell
It is 2~3min；
Preimpregnation：Automobile external part after reduction treatment to be sent into pre- immersion trough and presoaked, the prepreg solution in pre- immersion trough is 150~
The hydrochloric acid of 200ml/L, temperature is room temperature, presoaks 2~4min of the time；
Activation：Automobile external part feeding activated bath after preimpregnation is carried out into activation process, is put into after treatment and pure water is used in rinse bath
Rinse, temperature is 24~30 DEG C, 2~3min of soak time；
Dispergation：Automobile external part feeding solution glue groove after activation process is carried out into dispergation treatment, is put into after treatment in rinse bath and used
Pure water rinsing, is the solution glue that concentration is 200~230ml/L in solution glue groove, and temperature is 45~56 DEG C, 2~4min of dispergation time；
Chemical nickel plating：Plating solution for 40~45ml/L of concentration Ni-5A, pH value 8~8.5,35~40 DEG C of temperature, the time 7~
13min。
3. the pre-treating technology that a kind of automobile external part according to claim 2 is electroplated, it is characterised in that：In the roughening
The first roughening liquid bath in coarsening solution be the mixed liquor of the sulfuric acid of chromic acid and the 410~430g/L of concentration of 400~420g/L of concentration,
Coarsening solution is the chromic acid of 400~420g/L of concentration and the mixed liquor of the sulfuric acid of 390~410g/L of concentration in second roughening liquid bath.
4. the pre-treating technology that a kind of automobile external part according to claim 2 is electroplated, it is characterised in that：The step is lived
Activating solution in change in activated bath is the hydrochloric acid of 250~270ml/L of concentration, the Metal Palladium and concentration that concentration is 25~30ppm are 3
The mixed liquor of the stannous chloride of~4g/L.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611077179.6A CN106757240A (en) | 2016-11-30 | 2016-11-30 | A kind of pre-treating technology of automobile external part plating |
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| CN201611077179.6A CN106757240A (en) | 2016-11-30 | 2016-11-30 | A kind of pre-treating technology of automobile external part plating |
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| CN108531949A (en) * | 2018-05-15 | 2018-09-14 | 郎溪金诺塑胶表面处理有限公司 | A kind of chrome-plating method of automotive plastic accessory |
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| CN112941584A (en) * | 2021-01-27 | 2021-06-11 | 重庆安创材料科技有限公司 | Double-color electroplating process |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107794555A (en) * | 2017-09-13 | 2018-03-13 | 杭州莱源环保科技有限公司 | A kind of pre-treating technology of the double-colored plating of automobile decoration piece |
| CN108531949A (en) * | 2018-05-15 | 2018-09-14 | 郎溪金诺塑胶表面处理有限公司 | A kind of chrome-plating method of automotive plastic accessory |
| CN109483870A (en) * | 2018-10-26 | 2019-03-19 | 东南大学 | Board design and manufacturing method based on fused glass pellet 3D printing technique |
| CN109946169A (en) * | 2019-04-10 | 2019-06-28 | 珠海市永刚塑料制品有限公司 | A kind of tensile test technique of automobile decoration piece product |
| CN112941584A (en) * | 2021-01-27 | 2021-06-11 | 重庆安创材料科技有限公司 | Double-color electroplating process |
| CN113789504A (en) * | 2021-08-20 | 2021-12-14 | 清远敏惠汽车零部件有限公司 | Chemical plating method |
| CN113818061A (en) * | 2021-09-23 | 2021-12-21 | 镇江锦兴表面工程技术有限公司 | Surface electroplating process for ceramic product |
| CN115058750A (en) * | 2022-07-26 | 2022-09-16 | 浙江德洲五金有限公司 | Surface treatment process for high-strength handle |
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Application publication date: 20170531 |