CN104338668A - Surface autophoresis coating method of base materials and housing for electronic products - Google Patents
Surface autophoresis coating method of base materials and housing for electronic products Download PDFInfo
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- CN104338668A CN104338668A CN201310324175.3A CN201310324175A CN104338668A CN 104338668 A CN104338668 A CN 104338668A CN 201310324175 A CN201310324175 A CN 201310324175A CN 104338668 A CN104338668 A CN 104338668A
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- 239000000463 material Substances 0.000 title claims abstract description 87
- 238000000576 coating method Methods 0.000 title claims abstract description 62
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 89
- 239000011248 coating agent Substances 0.000 claims abstract description 60
- 238000000034 method Methods 0.000 claims abstract description 49
- 229910052742 iron Inorganic materials 0.000 claims abstract description 39
- 238000005240 physical vapour deposition Methods 0.000 claims abstract description 11
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 44
- 239000000758 substrate Substances 0.000 claims description 42
- 238000007747 plating Methods 0.000 claims description 40
- 238000007733 ion plating Methods 0.000 claims description 26
- 229910052786 argon Inorganic materials 0.000 claims description 22
- 238000002203 pretreatment Methods 0.000 claims description 21
- 238000004544 sputter deposition Methods 0.000 claims description 20
- 238000010849 ion bombardment Methods 0.000 claims description 13
- 239000010935 stainless steel Substances 0.000 claims description 11
- 229910001220 stainless steel Inorganic materials 0.000 claims description 11
- 229910000838 Al alloy Inorganic materials 0.000 claims description 10
- 229910001069 Ti alloy Inorganic materials 0.000 claims description 7
- 239000004033 plastic Substances 0.000 claims description 7
- 229920003023 plastic Polymers 0.000 claims description 7
- 229910000861 Mg alloy Inorganic materials 0.000 claims description 6
- 238000012423 maintenance Methods 0.000 claims description 5
- 239000003973 paint Substances 0.000 abstract description 16
- 239000000853 adhesive Substances 0.000 abstract description 7
- 230000001070 adhesive effect Effects 0.000 abstract description 7
- 238000005260 corrosion Methods 0.000 abstract description 4
- 230000007797 corrosion Effects 0.000 abstract description 2
- 230000009182 swimming Effects 0.000 description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 18
- 238000005422 blasting Methods 0.000 description 11
- 239000007789 gas Substances 0.000 description 11
- 238000004506 ultrasonic cleaning Methods 0.000 description 11
- 238000005406 washing Methods 0.000 description 10
- 239000007921 spray Substances 0.000 description 9
- 238000010422 painting Methods 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 7
- 229920005989 resin Polymers 0.000 description 7
- 239000011347 resin Substances 0.000 description 7
- 239000008367 deionised water Substances 0.000 description 6
- 229910021641 deionized water Inorganic materials 0.000 description 6
- 238000001755 magnetron sputter deposition Methods 0.000 description 6
- 238000005488 sandblasting Methods 0.000 description 6
- 238000005507 spraying Methods 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 239000003643 water by type Substances 0.000 description 5
- 239000002253 acid Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 239000000049 pigment Substances 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 239000010453 quartz Substances 0.000 description 4
- 230000002000 scavenging effect Effects 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 239000000839 emulsion Substances 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 229940098458 powder spray Drugs 0.000 description 3
- 206010015856 Extrasystoles Diseases 0.000 description 2
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 239000002390 adhesive tape Substances 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000015271 coagulation Effects 0.000 description 2
- 238000005345 coagulation Methods 0.000 description 2
- 238000000151 deposition Methods 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 238000001962 electrophoresis Methods 0.000 description 2
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- 150000002500 ions Chemical class 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000007800 oxidant agent Substances 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
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- 238000003618 dip coating Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- -1 freon Substances 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000006748 scratching Methods 0.000 description 1
- 230000002393 scratching effect Effects 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
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- 235000013619 trace mineral Nutrition 0.000 description 1
- 238000005491 wire drawing Methods 0.000 description 1
Landscapes
- Physical Vapour Deposition (AREA)
Abstract
The invention provides a method of autophoresis for surfaces of multiple base materials and a housing for electronic products and solves the problem that base material selection for autophoresis paints is limited. Base material is pre-coated by means of PVD (physical vapor deposition), thus the surface of the base material is coated with an iron-bearing coating; the base material pre-coated is then put in autophoresis paint and coated to obtain an autophoresis finishing paint layer. The iron-bearing coating processed by PVD is of good adhesive power and good wear resistance and corrosion resistance, and overall performance of a film layer is improved; meanwhile, a preparing process is clean and green and is easy to industrialize.
Description
Technical field
The invention belongs to substrate surface decoration and protection field, be specifically related to a kind of method realizing autophoresis coating at substrate surface.
Background technology
In incrustation and protection field, the main treatment technology used has electrophoresis, spraying, anodic oxidation etc. at present, although these processes have respective purposes and advantage, but also existing defects to a certain extent: electrophoretic painting equipment investment is large, management expectancy strict and after producing cleaning work amount large; Adhesive force, the wearability of spraying are relatively poor, and big for environment pollution; Anodic oxidation is carried out anodic oxidation at labyrinth easily occur hiding sour phenomenon as turning, narrow slit place, affect follow-up painted, yield is low.
Summary of the invention
The present invention in order to seek a kind of environmental protection, the simple coating process of technical process, and makes to have good adhesive force between coating and base material.Through a large amount of experimental studies have found that of the present inventor, good adhesive force can be produced with base material from swimming paint, again there is environmental protection simultaneously, use simple, convenient, fast, that running cost is low characteristic.But, due to narrow from the range of application of swimming paint, its unique advantage can not be played.Therefore the present invention needs to solve the existing confinement problems selected substrate material from swimming paint further, provides a kind of method that can realize autophoresis coating at multiple substrate surface, achieves the application of autophoresis coating.
Its implementation is as follows:
1) adopt physical vaporous deposition (PVD) to carry out pre-coating film treatment to base material, make its Surface coating one deck iron content pre-plating layer;
2) again the base material after coating film treatment pre-in step 1) is put into swimming paint certainly and carry out application, obtain outermost cover layer.
Autophoresis coating is that a kind of irony that utilizes treats the high valency electrolytes that application substrate surface exists, and with charged resin pigment particle generation chemical reaction, makes it Quick Coagulation realizes coating film forming process at substrate surface.From the key component of swimming paint be: the water dispersion of the oxidants such as synthetic resin emulsion, metal activation agent, freon, hydrogen peroxide and pigment.There is coating evenly, non-flanged effect from swimming coating, coating hardness is high, film flexibility is high, more rub resistance, inner chamber also can the features such as japanning, coating adhesion be good for coating.The participation of its technical process heavy metal free, being extensively present on market from swimming paint in recent years not containing organic volatile solvent, greatly reduces the pollution of application to environment.
Autophoresis coating operation principle is:
Workpiece under strong acid groove pendular ring border, metallic substrate surface stripping metal cations Fe
2+, it generates high valence ion Fe with oxidant reaction immediately
3+so, form the high valence ion field of high concentration at substrate surface and tank liquor interface, the stability of emulsion of interface be damaged, cause polymer in emulsion to sink to substrate surface fast.Owing to being wrapped with a large amount of moisture content in coagulation thing, in tank liquor, strong acid continues stripping metal ion through wet film, and repeats above-mentioned reaction, and wet film layer is constantly thickened.
Redox: Fe+2HF → Fe
2++ 2F
-+ H
2↑
Fe+ 2 FeF
3→3 Fe
2++6F
-
2Fe
2++H
2O
2+2HF→2 Fe
3++ 2H
2O+2F
-
Coating deposition: Fe
2++ resin pigment particle
-→ Fe resin pigment particle ↓
Reaction terminating: Fe
3++ 3F
-→ Fe F
3
As can be seen from above principle, need Fe from the application of swimming paint
2+participate in reaction, therefore autophoresis coating can only be applied on irony base material.
The present invention, by obtaining one deck containing iron plating with physical gas-phase deposite method on base material, makes the surface properties needed for base material acquisition, and then autophoresis coating can be realized on multiple base material, make it apply and be not limited on irony workpiece.The method of the invention can be applied to all various base materials that can be suitable for PVD process, as metal base and plastic rubber substrate, ceramic base materials etc. such as aluminium alloy, magnesium alloy, titanium alloys, or is the combination of above-mentioned multiple base material.The range of application of autophoresis coating is finally made to be expanded.
Under preferable case, the described thickness containing iron plating is 20 ~ 40 μm.
Under preferable case, described base material is the combination of one or more in aluminium alloy, magnesium alloy, titanium alloy, plastics or pottery.
Under preferable case, also comprise the step of described base material being carried out to pre-treatment before step 1), described pretreatment is carry out Ultrasonic Cleaning after sandblasting, then carries out argon ion bombardment.
Under preferable case, described physical vapour deposition (PVD) is specially magnetic controlled sputtering ion plating, and the target that described magnetic controlled sputtering ion plating adopts is stainless steel.
Under preferable case, described magnetic controlled sputtering ion plating adopts target structure, is 1-6 couple to target quantity.
Under preferable case, described magnetic controlled sputtering ion plating adopts the mode of batch-plating, and the maintenance intermittent time is 5-60min.
The present invention can also provide a kind of electronic product casing, described electronic product casing comprise base material and be formed in successively substrate surface containing iron plating and top coat layer, the described iron plating that contains is formed by the method for physical vapour deposition (PVD), and described top coat layer is for using autophoresis coating mode to be formed containing on iron plating.What wherein obtain through PVD process contains iron plating, has excellent adhesive force and wear-corrosion resistance, and preparation technology's cleanliness without any pollution, be easy to industrialization.
Under preferable case, the base material of described electronic product casing is the combination of one or more in aluminium alloy, magnesium alloy, titanium alloy, plastics or pottery.
Under preferable case, described is obtained by the method for magnetic controlled sputtering ion plating containing iron plating, and the target that described magnetic controlled sputtering ion plating adopts is stainless steel.
Accompanying drawing explanation
Fig. 1 is the sectional view of the embodiment of the present invention 1.
Wherein 1 is base material; 2 for containing iron plating; 3 is top coat layer.
Detailed description of the invention
Technical scheme of the present invention is as follows: a kind of method that can realize autophoresis coating at substrate surface, comprises, and base material is formed containing iron plating, described containing iron plating being formed from swimming top coat layer.
Described base material can be: metal base and plastic rubber substrate, the ceramic base materials etc. such as aluminium alloy, magnesium alloy, titanium alloy, or is the combination of above-mentioned multiple base material.Above for illustrating base material material, the material going for PVD plated film that in the present invention, available base material is known to the skilled person.The situation of described multiple substrate combination is similar to one, and implementation method is the known technological means of personnel in this area.
Under preferable case, described iron content thickness of coating is not less than 25 μm.
Concrete implementation step is as follows.
(1) pre-treatment:
For making containing iron plating with better from the combination property of coating of swimming, pre-treatment can be carried out to substrate surface before carrying out application process, this pre-treating method well known to a person skilled in the art, as carried out machine glazed finish, sandblasting or wire drawing process to base material, again base material is cleaned, can be Ultrasonic Cleaning, or use other cleaning methods conventional in this area according to actual needs.
After finishing Ultrasonic Cleaning, carry out argon ion bombardment process to base material, described argon ion bombardment is treated to and well known to a person skilled in the art technological means.To base material carry out argon ion bombardment process contribute to improving formed containing iron plating at the adhesive force of substrate surface.
(2) base material after pre-treatment carries out magnetic controlled sputtering ion plating and obtains containing the pre-film plating layer of one deck iron:
Use magnetic controlled sputtering ion plating equipment, when vacuum in stove is 5.0 × 10
-3-1.2 × 10
-2during pa, pass into argon gas, vacuum is 1.0 × 10
-1-2.0pa, is preferably 2.0 × 10
-1carry out in-1.0pa environment.Control bias voltage is 50-500V, is preferably 100-300V; Dutycycle is 15%-80%, is preferably 20-70%; The plated film real time is 30-180min, is preferably 60-120min.The described plated film real time is target power supply, grid bias power supply is plated film time under opening, and do not comprise the intermittent time, interval number of times can be set to one or many according to the plated film real time.Adopt this plated film mode can discharge internal stress containing iron plating in time, avoid occurring quick-fried film phenomenon, improve film adhesion.
The argon working gas flow of described magnetic controlled sputtering ion plating is 20-200 standard milliliters/minute (sccm), is preferably 50-150sccm.
The power supply of described magnetic controlled sputtering ion plating can make the existing various power supply for magnetic controlled sputtering ion plating, and be preferably intermediate frequency power supply, intermediate frequency power supply frequency is 10-150KHz, is preferably 10-100KHz.
304,316,316L, 321,403,430 target of described magnetic controlled sputtering ion plating is stainless steel, and stainless target conventional in this area has:, and the preferred trade mark is the stainless target of 316L.
Described magnetic controlled sputtering ion plating adopts target structure, and often pair of magnetic control target is by an Energy control, and two magnetic control targets are connected with an electrode of power supply separately, and keep insulating with vacuum chamber.Adopt 1-6 to target in the present invention, be preferably 3-4 to target structure.Distance between two targets of often pair of magnetic control target is 10-25cm, is preferably 14-22cm.Work rest can around the central shaft of vacuum chamber clockwise or rotate counterclockwise, and rotating speed controls at 0.5-10rad/min, is preferably 2-6rad/min.
Described magnetic controlled sputtering ion plating adopts the mode of batch-plating, and namely after plated film certain hour, close target power supply, grid bias power supply, maintenance fire door is closed condition, maintains intermittent time 5-60min, is preferably 10-30min.Afterwards, again open target power supply, grid bias power supply according to above-mentioned condition, continue plated film, so repeatedly several times.
Above-mentioned technique can adopt invariable power pattern, and the power of described intermediate frequency power supply is the steady state value within the scope of 1-50KW, is preferably the steady state value within the scope of 5-35KW, is more preferably the steady state value within the scope of 10-25KW.
Described formation can adopt containing iron plating but be not limited to the conventional medium frequency magnetron sputtering ion plating equipment in this area (Shenzhen shake Industrial Co., Ltd. of Hengchang produce) to be carried out, also other PVD equipment such as multi sphere plating, evaporation plating can be adopted to carry out, the iron content coating structure obtained is fine and close, and internal component is evenly distributed.
(3) base material be coated with containing iron plating in step (2) is carried out autophoresis coating, described formation comprises following processing step from the method for swimming top coat layer.
Spray washing:
The groove with spray equipment put into by the base material plated on surface containing iron plating, uses running water spray washing 30-180s, is preferably 60-120s, removes the dirty impurity turning substrate surface attachment in material process.
Deionized water is embathed:
Base material after spray washing being put into electrical conductivity is that the deionized water of 20-50us/cm embathes 30-180s, is preferably 60-120s, to remove some trace elements such as ionized calcium, phosphorus on substrate surface in moisture content.
Self-electrophoretic paint coating:
Base material after deionized water is embathed is put into from paint of swimming (Henkel (China) limited company production, Aquence 866 type is to swim paint) in carry out application, controlling painting ETL estimated time of loading is 1-3min, and application temperature is 18-25 DEG C, be preferably 20-22 DEG C, substrate surface is formed from swimming coating.
Washing:
Base material after application is put into flowing clear water and clean 30-180s, be preferably 60-120s, remove surperficial raffinate.
Reaction washing:
By the base material after washing, to put into electrical conductivity be 1000-4000us/cm, pH is clean 30-180s in the sealer of 7-9, is preferably 60-120s, in and substrate surface acid wash away adsorption thing.
Baking-curing:
It is 100-220 DEG C that base material after reaction washing is put into temperature, is preferably the baking oven interior baking 20-45min of 110-200 DEG C, treats that substrate surface coating is solidified completely.
Can realize disclosed by the inventionly carrying out autophoresis coating at multiple substrate surface by above-mentioned process.Below by embodiment, the present invention is described further.
Embodiment 1:
The trade mark is selected to be that the aluminium alloy of 6463 is as base material.
1. pre-treatment comprises the following steps.
(1) blasting treatment
Under the effect of 2.5kg power, 320 order quartz sands are ejected into substrate surface with sand-blasting machine and carry out blasting treatment.
(2) Ultrasonic Cleaning
Be immersed in successively in 90 DEG C of Wax removal waters, oil water removal solution and 70 DEG C of deionized waters the base material after above-mentioned blasting treatment and carry out Ultrasonic Cleaning, scavenging period is followed successively by 5min, 5min, 10min, washs between each step with clear water.
(3) argon ion bombardment pretreatment
Medium frequency magnetron sputtering ion plating equipment is used to carry out argon ion bombardment process to base material herein.Base material after Ultrasonic Cleaning is put into equipment, when stove internal gas pressure is 1.0 × 10
-2pass into argon gas during pa, carry out argon ion bombardment pretreatment, argon ion bombardment treatment conditions are: maintenance air pressure is 2.0pa, and bias voltage is 1000V, and dutycycle is 50%, and the time is 15min.After completing, stopping argon gas passing into and closes grid bias power supply, continues to find time in stove.
Obtain the base material A11 after pre-treatment.
2. the step formed containing iron plating is:
Base material A11 after carrying out pre-treatment is put into medium frequency magnetron sputtering ion plating equipment (Shenzhen shake Industrial Co., Ltd. of Hengchang).When vacuum in stove is 6.0 × 10
-3during Pa, pass into argon working gas, keep vacuum to be 5.0 × 10
-1pa, open stainless steel target power supply, power is 20KW, and bias voltage is 150V, and dutycycle is 30%, and the plated film real time is 80min, and the intermittent time is 20min, and interval number of times is 1 time, thickness be 27 μm containing iron plating.
Close stainless steel target power supply, close grid bias power supply, cooling 15min comes out of the stove, and obtains the surperficial base material A12 formed containing iron plating.
3. formed and from the step of swimming coating be:
Embathed by spray washing, deionized water successively by above-mentioned base material A12, scavenging period is followed successively by 90s, 90s.
Afterwards, above-mentioned base material being put into temperature is 20 DEG C painting from swimming, and dip-coating 2min, carries out application, and substrate surface is formed from swimming top coat layer.
Afterwards, above-mentioned base material is put into clear water and embathes 120s, remove coating surface raffinate.
Afterwards, above-mentioned base material to be put into electrical conductivity be 1800us/cm, pH be 8 sealer, cleaning 90s.
Finally, above-mentioned base material is put into the baking oven that temperature is 110 DEG C, baking 30min, after baking-curing, the coating of certainly swimming after substrate surface forms 20 μm.
Finally obtain autophoresis coating product A 1.
The above is by Autophoretic 866 type resin, Autophoretic 300 Sarter type resin, deionized water from swimming paint, according to Autophoretic 866 type resin: Autophoretic 300 Sarter type resin: the ratio of deionized water=113:50:837 and making; Described sealer is ACC3414 type sealer.
Embodiment 2:
Select PPS plastic plate as base material.
1. pre-treatment
(1) blasting treatment
Under the effect of 2.5kg power, 320 order quartz sands are ejected into substrate surface with sand-blasting machine and carry out blasting treatment.
(2) Ultrasonic Cleaning
Be immersed in successively by base material in normal temperature oil water removal solution and 70 DEG C of deionized waters and carry out Ultrasonic Cleaning, scavenging period is followed successively by 5min, 10min, washs between each step with clear water.
(3) argon ion bombardment pretreatment
Medium frequency magnetron sputtering ion plating equipment is used to carry out argon ion bombardment process to base material herein.Base material after Ultrasonic Cleaning is put into equipment, when stove internal gas pressure is 1.0 × 10
-2pass into argon gas during pa, carry out argon ion bombardment pretreatment, argon ion bombardment treatment conditions are: maintenance air pressure is 2.0pa, and bias voltage is 1000V, and dutycycle is 50%, and the time is 15min.After completing, stopping argon gas passing into and closes grid bias power supply, continues to find time in stove.
Obtain the base material A21 after pre-treatment.
(1) formed containing iron plating
Base material A21 after carrying out pre-treatment is put into medium frequency magnetron sputtering ion plating equipment (Shenzhen shake Industrial Co., Ltd. of Hengchang).Pass into argon working gas, keep vacuum to be 5.0 × 10
-1pa, open stainless steel target power supply, power is 10KW, and bias voltage is 100V, and dutycycle is 20%, and the plated film real time is 120min, and the intermittent time is 15min, and interval number of times is 2 times, obtain thickness be 22 μm containing iron plating.
Close stainless steel target power supply, close grid bias power supply, cooling 15min comes out of the stove, and obtains the surperficial base material A22 formed containing iron plating.
(2) formed from swimming top coat layer
Above-mentioned base material A22 is carried out from swimming process.From identical with embodiment 1 of swimming process and parameter, difference is: baking time is 40min, and substrate surface forms the coating of certainly swimming of 17 μm.
Finally obtain autophoresis coating product A 2.
Embodiment 3:
The trade mark is selected to be that TA1 titanium alloy is as base material.
1, pre-treatment: with embodiment 1.
Obtain the base material A31 after pre-treatment.
2, formed containing iron plating:
Base material A31 after carrying out pre-treatment is put into medium frequency magnetron sputtering ion plating equipment (Shenzhen shake Industrial Co., Ltd. of Hengchang).Pass into argon working gas, keep vacuum to be 5.0 × 10
-1pa, open stainless steel target power supply, power is 25KW, and bias voltage is 250V, and dutycycle is 70%, and the plated film real time is 100min, and the intermittent time is 25min, and interval number of times is 2 times, obtain thickness be 35um containing iron plating.
Close stainless steel target power supply, close grid bias power supply, cooling 15min comes out of the stove, and obtains the surperficial base material A32 formed containing iron plating.
Formed from swimming top coat layer
Above-mentioned base material A32 is carried out from swimming process.From identical with embodiment 1 of swimming process and parameter, difference is: finally above-mentioned base material is put into the baking oven that temperature is 150 DEG C, baking 20min, after baking-curing, and the top coat layer of certainly swimming that substrate surface formation 28um is thick.
Finally obtain autophoresis coating product A 3.
Comparative example 1:
Aluminium alloy (trade mark is 6463) is as base material.
1, pre-treatment.
(1) blasting treatment
Under the effect of 2.5kg power, 320 order quartz sands are ejected into substrate surface with sand-blasting machine and carry out blasting treatment.
(2) Ultrasonic Cleaning
Be immersed in successively in 90 DEG C of Wax removal waters, oil water removal solution and 70 DEG C of deionized waters the base material after above-mentioned blasting treatment and carry out Ultrasonic Cleaning, scavenging period is followed successively by 5min, 5min, 10min, washs between each step with clear water.
2, the base material D0 after pre-treatment is obtained.
Form electrophoretic coating:
Above-mentioned base material D0 is put into electrophoretic paint as negative electrode, is 4.5 at cathode electrodip painting pH, and temperature is 23 DEG C, and voltage is under the condition of 35V, electrophoresis 40s, and surface forms electrophoretic coating.
Afterwards, above-mentioned base material is put into clear water and embathes 120s, remove coating surface raffinate.
Finally, above-mentioned base material is put into the baking oven that temperature is 175 DEG C, baking 50min, after baking-curing, substrate surface forms the electrophoretic coating after 10 μm.
Finally obtain electrophoretic painting product D1.
Above-mentioned electrophoretic paint adopts the CM cathode electrodip painting of Japanese clear water Co., Ltd. and blue mill base (Japanese clear water Co., Ltd., the trade mark is Blue) to mix and makes.
Comparative example 2:
Aluminium alloy (trade mark is 6463) is as base material.
1, pre-treatment.
(1) blasting treatment
Under the effect of 2.5kg power, 320 order quartz sands are ejected into substrate surface with sand-blasting machine and carry out blasting treatment.
(2) pre-treatment is sprayed
Carry out ungrease treatment (acid concentration 70g/L) 8min, bigeminy washing 4min, chromaking process (chromaking agent concentration 30g/L) 3min, bigeminy washing 4min successively to the base material after above-mentioned blasting treatment, each step is all at room temperature carried out.
Finally at 70 DEG C, toast 50min, obtain the base material D21 after pre-treatment.
2, powder spray coating is formed.
Above-mentioned base material D21 is put into powder spraying chamber (the manual electrostatic powder coating system of ID standard type that waag nail (unit of length) spraying equipment Co., Ltd produces), control spray gun voltage 100kV, electric current 120uA, total tolerance 3.5m3/h, powder amount 40%, to dust process to substrate surface.
Afterwards, the baking oven baking-curing 20min that temperature is 200 DEG C is put into.
Finally obtain powder spray application product D2.
The Interpon D1000 Series powder coating that above-mentioned powder spray coatings adopts Akzo Nobel Chang Cheng coating Co., Ltd to produce, coating model is Black GN402Z.
Comparative example 3:
Aluminium alloy (trade mark is 6463) is as base material.
The pre-treatment of comparative example 3 and embodiment 1, formed containing iron plating two-step process identical, institute's difference is final step, and comparative example 3 adopts electrophoretic painting, and form electrophoretic coating, concrete technology is identical with comparative example 1.
Finally obtain electrophoretic painting product D3.
According to following method of testing, test analysis is carried out to embodiment and comparative example test result.
Hardness test:
Instrument: pencil hardometer F130027
The method of inspection: ASTM D3363, load: 750g, pencil: Mitsubishi UNI.
Adhesion is tested:
Draw the square lattice of 100 1mm × 1mm at coating surface with cross-cut tester, smoothly be bonded on grid with the adhesive tape that the model that Minnesota Mining and Manufacturing Company produces is 600, do not stay a space, then rapid vertical uncovers adhesive tape, observes the rete at scratching edge place with or without coming off.If demoulding amount is 5B between 0-5 area %, be 4B between 5-10 area %, be 3B between 10-20 area %, is 2B between 20-30 area %, is 1B between 30-50 area %, is 0B at 50 more than area %.
Neutral salt spray (NSS) is tested:
With the inclination angle of 25 °, workpiece is placed on that temperature is 35 DEG C, in the chamber (HOLINK H-SST-90 salt spray tester) of humidity >=85%RH, sprays continuously respectively after 48h, 144h and 168h with the solution (NaCl solution of solution composition: 50g/l) of pH=6.8 and take out; Whether rinse 5min with normal temperature clear water and dry up with hair-dryer, at room temperature placing 1h, observing workpiece outward appearance has exception (hot spot or corrosion line).
As shown in table 1 by the test result of said method test gained.
Table 1:
。
As can be seen from the test result of table 1, adopt method disclosed by the invention, autophoresis coating can be carried out at multiple substrate surface, and high from swimming coating hardness, adhesive force and excellent anti-corrosion performance, all can reach standard.
Claims (10)
1. in a method for substrate surface autophoresis coating, it is characterized in that, comprise the following steps:
1) iron plating is contained with physical vapour deposition (PVD) preplating one deck on base material;
2) base material after step 1) process carries out autophoresis coating, is containing forming surface enamelled coating on iron plating.
2. the method at substrate surface autophoresis coating according to claim 1, is characterized in that, the described thickness containing iron plating is 20 ~ 40 μm.
3. the method at substrate surface autophoresis coating according to claim 1, is characterized in that, described base material is the combination of one or more in aluminium alloy, magnesium alloy, titanium alloy, plastics or pottery.
4. the method at substrate surface autophoresis coating according to claim 1, is characterized in that, also comprise the step of described base material being carried out to pre-treatment before step 1, described pre-treatment comprises argon ion bombardment.
5. the method at substrate surface autophoresis coating according to claim 1, is characterized in that, described physical vapour deposition (PVD) is specially magnetic controlled sputtering ion plating, and the target that described magnetic controlled sputtering ion plating adopts is stainless steel.
6. the method at substrate surface autophoresis coating according to claim 4, is characterized in that, described magnetic controlled sputtering ion plating adopts target structure, is 1-6 couple to target quantity.
7. the method at substrate surface autophoresis coating according to claim 4, is characterized in that, described magnetic controlled sputtering ion plating adopts the mode of batch-plating, and the maintenance intermittent time is 5-60min.
8. an electronic product casing, described electronic product casing comprise base material and be formed in successively substrate surface containing iron plating and top coat layer, the described iron plating that contains is formed by the method for physical vapour deposition (PVD), and described top coat layer is for being formed by autophoresis coating mode containing on iron plating.
9. a kind of electronic product casing according to claim 8, is characterized in that, the base material of described electronic product casing is the combination of one or more in aluminium alloy, magnesium alloy, titanium alloy, plastics or pottery.
10. a kind of electronic product casing according to claim 8, is characterized in that, described is obtained by the method for magnetic controlled sputtering ion plating containing iron plating, and the target that described magnetic controlled sputtering ion plating adopts is stainless steel.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110144611A (en) * | 2019-06-10 | 2019-08-20 | 河北工业大学 | Corrosion-resistant and wear-resistant composite coating on magnesium alloy surface and preparation method thereof |
| CN111719174A (en) * | 2019-11-18 | 2020-09-29 | 江阴市友邦家居用品有限公司 | Surface autophoresis process for various metal furniture |
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| CN101352947A (en) * | 2007-07-23 | 2009-01-28 | 比亚迪股份有限公司 | Outer casing of electronic product and preparation method thereof |
| CN101675181A (en) * | 2007-05-04 | 2010-03-17 | 汉高两合股份公司 | Preliminary metallizing treatment of zinc surfaces |
| US20130126086A1 (en) * | 2009-03-13 | 2013-05-23 | Xintec Inc. | Electronic device package and method for forming the same |
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|---|---|---|---|---|
| CN101675181A (en) * | 2007-05-04 | 2010-03-17 | 汉高两合股份公司 | Preliminary metallizing treatment of zinc surfaces |
| CN101352947A (en) * | 2007-07-23 | 2009-01-28 | 比亚迪股份有限公司 | Outer casing of electronic product and preparation method thereof |
| US20130126086A1 (en) * | 2009-03-13 | 2013-05-23 | Xintec Inc. | Electronic device package and method for forming the same |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110144611A (en) * | 2019-06-10 | 2019-08-20 | 河北工业大学 | Corrosion-resistant and wear-resistant composite coating on magnesium alloy surface and preparation method thereof |
| CN111719174A (en) * | 2019-11-18 | 2020-09-29 | 江阴市友邦家居用品有限公司 | Surface autophoresis process for various metal furniture |
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