CN105525266A - Vacuum coating process for aluminum alloy hub - Google Patents
Vacuum coating process for aluminum alloy hub Download PDFInfo
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- CN105525266A CN105525266A CN201510987643.4A CN201510987643A CN105525266A CN 105525266 A CN105525266 A CN 105525266A CN 201510987643 A CN201510987643 A CN 201510987643A CN 105525266 A CN105525266 A CN 105525266A
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- vacuum
- spraying
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- plating
- vacuum coating
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- 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
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
- C23C14/34—Sputtering
- C23C14/35—Sputtering by application of a magnetic field, e.g. magnetron sputtering
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
- B05D1/04—Processes for applying liquids or other fluent materials performed by spraying involving the use of an electrostatic field
- B05D1/06—Applying particulate materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/36—Successively applying liquids or other fluent materials, e.g. without intermediate treatment
- B05D1/38—Successively applying liquids or other fluent materials, e.g. without intermediate treatment with intermediate treatment
-
- 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
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/02—Pretreatment of the material to be coated
- C23C14/024—Deposition of sublayers, e.g. to promote adhesion of the coating
Abstract
The invention belongs to the field of a vacuum coating process for a metal product, in particular to a vacuum coating process for an aluminum alloy hub. The vacuum coating process comprises the following steps: (1) pre-treating an aluminum alloy hub blank; (2) spraying and drying bottom powder which comprises epoxy resin and is sprayed in an electrostatic spraying way; (3); polishing and washing the bottom powder body; (4) spraying and drying medium powder which comprises novolac epoxy resin and is sprayed in the electrostatic spraying way; (5) performing vacuum coating, namely performing vacuum coating in a vacuum magnetron sputtering coating way; (6) spraying a finishing varnish; (7) obtaining a finished product and inspecting and packaging the finished product. The vacuum coating process disclosed by the invention has the advantages of being simple and convenient to operate, high in coating efficiency, free of pollution of three wastes and high in combination degree, flatness, glossiness, hardness and corrosion resistance of a coating layer.
Description
Technical field
The invention belongs to the technique for vacuum coating field of metal products, particularly relate to a kind of aluminium alloy wheel hub technique for vacuum coating.
Background technology
At present, the develop rapidly of automobile industry has also driven the develop rapidly of wheel hub manufacturing industry, and aluminium alloy wheel hub is used for feature handsome in appearance, lightweight, rapid heat dissipation out of roundness is high and becomes the wheel hub product of main flow.Existing surface of aluminum alloy hub process has the methods such as application, water power plating, vacuum plating, and wherein application and water power plating are used more.Water power plating wheel hub has high brightness, the well surface quality such as wear-resisting, but it exists in process of production, and operation sequence is many, difficulty is large, consume a large amount of precious metal and produce the problem of a large amount of three wastes, therefore a lot of manufacture all instead of water power plating with vacuum plating.
The Chinese invention patent that patent publication No. is CN104060224A, publication date is 2014.09.24 discloses a kind of vacuum coating method of metalwork, metalwork is positioned in vacuum chamber, adopts vacuum coating method at metalwork deposited on silicon layer of metal film.Described metalwork is aluminum, and described metal targets is aluminum; Coating process parameter is as follows: vacuum tightness is 3 × 10-3Pa-5 × 10-3Pa, and metalwork preheating temperature is 70-150 DEG C, and the negative voltage put in metal targets is 200-1000V, and depositing time is 50-120 minute, and the thickness of metallic film is 50 μm-80 μm.
But this invention exists coating process complexity, coating is in conjunction with unstable problem.
Summary of the invention
The object of this invention is to provide a kind of aluminium alloy wheel hub technique for vacuum coating, it has simple to operation, and plated film efficiency is high, three-waste free pollution, the advantage that coating conjugation, planeness, glossiness, hardness and corrosion-resistant degree are high.
The technical scheme that the present invention overcomes the above problems employing is: a kind of aluminium alloy wheel hub technique for vacuum coating, comprises the following steps:
(1) aluminum alloy hub blank pre-treatment;
(2) spray, dry end powder: powder of the described end comprises epoxy resin, and spraying method is electrostatic spraying;
(3) polish, clean end powder powder;
(4) spray, dry medium powder: described medium powder comprises novolac epoxy, and spraying method is electrostatic spraying;
(5) vacuum plating: described vacuum plating mode is specially a kind of vacuum magnetron sputtering coating film mode;
(6) coating varnish is sprayed;
(7) finished product, inspection, packaging.
During this is arranged, described step mainly comprises pre-treatment, dusting, vacuum plating and spraying coating varnish, ensure that coating itself has higher conjugation, planeness, glossiness, hardness and corrosion-resistant degree, and make the combination of described plating material and aluminium alloy wheel hub more firm, not easily come off.
Preferred technical scheme is further: described step (1) aluminum alloy hub blank pre-treatment mainly comprises polishing, degreasing, pickling and passivation four procedure, described polishing operation adopts 120# sand paper, described degreasing process comprises pre-degreasing and main degreasing, described pickling adopts pH to be the dilute sulphuric acid of 3.5-4.5, described passivation procedure is chromium-free deactivation, is specially a kind of metallic surface silanization process.Pre-treatment step described in this setting can ensure that described surface of aluminum alloy hub is clean, smooth, ensures carrying out smoothly of follow-up described dusting and vacuum plating step.
Preferred technical scheme is further: finally carry out deionized water hydro-peening in described step (1) aluminum alloy hub blank pre-treatment, altogether hydro-peening 4-5 time.This is arranged so that described surface of aluminum alloy hub not containing impurity, ensure that cleanliness factor.
Preferred technical scheme is further: in described step (2) spraying, oven dry end powder, bake out temperature is 180 DEG C, and drying time is 15-18min.
Preferred technical scheme is further: in described step (3) polishing, cleaning end powder powder, described polishing adopts 400# sand paper, and the water temperature of described cleaning is 40-45 DEG C.
Preferred technical scheme is further: described in described step (4) spraying, oven dry medium powder, baking operation is provided with twice altogether, in baking operation, bake out temperature is 150 DEG C for the first time, drying time is 20-25min, in second time baking operation, bake out temperature is 210 DEG C, and drying time is 30-35min.
Preferred technical scheme is further: described in described step (4) spraying, oven dry medium powder, medium powder comprises novolac epoxy: 95 parts; Flow agent: 2 parts and defoamer: part.
Preferred technical scheme is further: described step (5) vacuum plating is carried out in vacuum magnetron sputtering film plating machine, comprises altogether medium powder surface ion bombardment processing and plating material electroplating surface two procedures.The object of the bombardment processing of medium powder surface ion described in this setting be remove described surface of aluminum alloy hub impurity, oxide compound and that described medium powder is formed is cellular, the combination of described plating material and described medium powder and surface of aluminum alloy hub when being convenient to vacuum plating, improves coating conjugation.
Further preferred technical scheme is: during the described medium powder surface ion bombardment processing of described step (5) vacuum plating, described vacuum magnetron sputtering film plating machine vacuum tightness is 9.0 × 10
-3pa, the high-purity argon gas be filled with is 200-500ml, and current settings is 20-25A, and the time length is 150-200s.
Preferred technical scheme is further: in the described plating material electroplating surface operation of described step (5) vacuum plating, described plating material is Alloy Plating material, comprise aluminium, iron, nickel and chromium, electroplating voltage is 600-800V, electric current is 150-160A, the high-purity argon gas be filled with is 550-600ml, and the time length is 300-320s.
Preferred technical scheme is further: in described step (6) spraying coating varnish, described coating varnish is mainly acrylic resin, dries after spraying, and bake out temperature is 150 DEG C, and drying time is 20-25min.Coating varnish described in this setting can improve the glossiness of described surface of aluminum alloy hub, sharpness and fullness ratio.
The present invention, by surface of aluminum alloy hub pre-treatment, dusting, vacuum plating and spraying coating varnish four road key step, ensures that described aluminium alloy wheel hub and described coating are in conjunction with firm difficult drop-off.The present invention has simple to operation, and plated film efficiency is high, three-waste free pollution, the advantage that coating conjugation, planeness, glossiness, hardness and corrosion-resistant degree are high.
Accompanying drawing explanation
Fig. 1 is schematic flow sheet of the present invention.
Embodiment
The following stated is only preferred embodiment of the present invention, non-ly limits scope of the present invention.
Embodiment 1: as described in Figure 1, a kind of aluminium alloy wheel hub technique for vacuum coating, comprises the following steps:
(1) aluminum alloy hub blank pre-treatment;
(2) spray, dry end powder: powder main component of the described end is epoxy resin, and spraying method is electrostatic spraying;
(3) polish, clean end powder powder;
(4) spray, dry medium powder: described medium powder main component is novolac epoxy, and spraying method is electrostatic spraying;
(5) vacuum plating: described vacuum plating mode is specially a kind of vacuum magnetron sputtering coating film mode;
(6) coating varnish is sprayed;
(7) finished product, inspection, packaging.
Described step mainly comprises pre-treatment, dusting, vacuum plating and spraying coating varnish, ensure that coating itself has higher conjugation, planeness, glossiness, hardness and corrosion-resistant degree, and make the combination of described plating material and aluminium alloy wheel hub more firm, not easily come off.
Described step (1) aluminum alloy hub blank pre-treatment mainly comprises polishing, degreasing, pickling and passivation four procedure, described polishing operation adopts 120# sand paper, described degreasing process comprises pre-degreasing and main degreasing, described pickling adopts pH to be the dilute sulphuric acid of 3.5, described passivation procedure is chromium-free deactivation, is specially a kind of metallic surface silanization process.Described pre-treatment step can ensure that described surface of aluminum alloy hub is clean, smooth, ensures carrying out smoothly of follow-up described dusting and vacuum plating step.Finally carry out deionized water hydro-peening in described step (1) aluminum alloy hub blank pre-treatment, altogether hydro-peening 4 times, make described surface of aluminum alloy hub not containing impurity, ensure that cleanliness factor.In described step (2) spraying, oven dry end powder, bake out temperature is 180 DEG C, and drying time is 15min.In described step (3) polishing, cleaning end powder powder, described polishing adopts 400# sand paper, and the water temperature of described cleaning is 40 DEG C.Described in described step (4) spraying, oven dry medium powder, baking operation is provided with twice altogether, and in baking operation, bake out temperature is 150 DEG C for the first time, and drying time is 20min, and in second time baking operation, bake out temperature is 210 DEG C, and drying time is 30min.Described in described step (4) spraying, oven dry medium powder, medium powder comprises novolac epoxy: 95 parts; Flow agent: 2 parts and defoamer: 2 parts.
Described step (5) vacuum plating is carried out in vacuum magnetron sputtering film plating machine, comprises altogether medium powder surface ion bombardment processing and plating material electroplating surface two procedures.The object of described medium powder surface ion bombardment processing be remove described surface of aluminum alloy hub impurity, oxide compound and that described medium powder is formed is cellular, the combination of described plating material and described medium powder and surface of aluminum alloy hub when being convenient to vacuum plating, improves coating conjugation.During the described medium powder surface ion bombardment processing of described step (5) vacuum plating, described vacuum magnetron sputtering film plating machine vacuum tightness is 9.0 × 10
-3pa, the high-purity argon gas be filled with is 200ml, and current settings is 20A, and the time length is 150s.In the described plating material electroplating surface operation of described step (5) vacuum plating, described plating material is Alloy Plating material, comprises aluminium, iron, nickel and chromium, and electroplating voltage is 600V, and electric current is 150A, and the high-purity argon gas be filled with is 550ml, and the time length is 300s.
In described step (6) spraying coating varnish, described coating varnish is mainly acrylic resin, dries after spraying, and bake out temperature is 150 DEG C, and drying time is 20min.Described coating varnish can improve the glossiness of described surface of aluminum alloy hub, sharpness and fullness ratio.
Embodiment 2: as described in Figure 1, a kind of aluminium alloy wheel hub technique for vacuum coating, comprises the following steps:
(1) aluminum alloy hub blank pre-treatment;
(2) spray, dry end powder: powder of the described end comprises epoxy resin, and spraying method is electrostatic spraying;
(3) polish, clean end powder powder;
(4) spray, dry medium powder: described medium powder comprises novolac epoxy, and spraying method is electrostatic spraying;
(5) vacuum plating: described vacuum plating mode is specially a kind of vacuum magnetron sputtering coating film mode;
(6) coating varnish is sprayed;
(7) finished product, inspection, packaging.
Described step mainly comprises pre-treatment, dusting, vacuum plating and spraying coating varnish, ensure that coating itself has higher conjugation, planeness, glossiness, hardness and corrosion-resistant degree, and make the combination of described plating material and aluminium alloy wheel hub more firm, not easily come off.
Described step (1) aluminum alloy hub blank pre-treatment mainly comprises polishing, degreasing, pickling and passivation four procedure, described polishing operation adopts 120# sand paper, described degreasing process comprises pre-degreasing and main degreasing, described pickling adopts pH to be the dilute sulphuric acid of 3.5, described passivation procedure is chromium-free deactivation, is specially a kind of metallic surface silanization process.Described pre-treatment step can ensure that described surface of aluminum alloy hub is clean, smooth, ensures carrying out smoothly of follow-up described dusting and vacuum plating step.Finally carry out deionized water hydro-peening in described step (1) aluminum alloy hub blank pre-treatment, altogether hydro-peening 4 times, make described surface of aluminum alloy hub not containing impurity, ensure that cleanliness factor.In described step (2) spraying, oven dry end powder, bake out temperature is 180 DEG C, and drying time is 18min.In described step (3) polishing, cleaning end powder powder, described polishing adopts 400# sand paper, and the water temperature of described cleaning is 45 DEG C.Described in described step (4) spraying, oven dry medium powder, baking operation is provided with twice altogether, and in baking operation, bake out temperature is 150 DEG C for the first time, and drying time is 25min, and in second time baking operation, bake out temperature is 210 DEG C, and drying time is 35min.Described in described step (4) spraying, oven dry medium powder, medium powder comprises novolac epoxy: 95 parts; Flow agent: 2 parts and defoamer: 2 parts.
Described step (5) vacuum plating is carried out in vacuum magnetron sputtering film plating machine, comprises altogether medium powder surface ion bombardment processing and plating material electroplating surface two procedures.The object of described medium powder surface ion bombardment processing be remove described surface of aluminum alloy hub impurity, oxide compound and that described medium powder is formed is cellular, the combination of described plating material and described medium powder and surface of aluminum alloy hub when being convenient to vacuum plating, improves coating conjugation.During the described medium powder surface ion bombardment processing of described step (5) vacuum plating, described vacuum magnetron sputtering film plating machine vacuum tightness is 9.0 × 10
-3pa, the high-purity argon gas be filled with is 500ml, and current settings is 25A, and the time length is 20s.In the described plating material electroplating surface operation of described step (5) vacuum plating, described plating material is Alloy Plating material, comprises aluminium, iron, nickel and chromium, and electroplating voltage is 800V, and electric current is 160A, and the high-purity argon gas be filled with is 600ml, and the time length is 320s.
In described step (6) spraying coating varnish, described coating varnish is mainly acrylic resin, dries after spraying, and bake out temperature is 150 DEG C, and drying time is 25min.Described coating varnish can improve the glossiness of described surface of aluminum alloy hub, sharpness and fullness ratio.
Carry out following technical indicator test to the sample in embodiment 1 and embodiment 2, test result is in table 1
Table 1 aluminium alloy wheel hub sample technical indicator table with test results
Above embodiments of the present invention are explained in detail, but the invention is not restricted to above-mentioned embodiment, in the ken that described technical field those of ordinary skill possesses, various amendment can also be made under the prerequisite not departing from present inventive concept.These are all not creative amendments, as long as be all subject to the protection of patent law in right of the present invention.
Claims (10)
1. an aluminium alloy wheel hub technique for vacuum coating, is characterized in that comprising the following steps:
(1) aluminum alloy hub blank pre-treatment;
(2) spray, dry end powder: powder of the described end comprises epoxy resin, and spraying method is electrostatic spraying;
(3) polish, clean end powder powder;
(4) spray, dry medium powder: described medium powder comprises novolac epoxy, and spraying method is electrostatic spraying;
(5) vacuum plating: described vacuum plating mode is specially a kind of vacuum magnetron sputtering coating film mode;
(6) coating varnish is sprayed;
(7) finished product, inspection, packaging.
2. a kind of aluminium alloy wheel hub technique for vacuum coating according to claim 1, it is characterized in that: described step (1) aluminum alloy hub blank pre-treatment mainly comprises polishing, degreasing, pickling and passivation four procedure, described polishing operation adopts 120# sand paper, described degreasing process comprises pre-degreasing and main degreasing, described pickling adopts pH to be the dilute sulphuric acid of 3.5-4.5, described passivation procedure is chromium-free deactivation, is specially a kind of metallic surface silanization process.
3. a kind of aluminium alloy wheel hub technique for vacuum coating according to claim 1 and 2, is characterized in that: finally carry out deionized water hydro-peening in described step (1) aluminum alloy hub blank pre-treatment, altogether hydro-peening 4-5 time.
4. a kind of aluminium alloy wheel hub technique for vacuum coating according to claim 1, is characterized in that: in described step (2) spraying, oven dry end powder, bake out temperature is 180 DEG C, and drying time is 15-18min; In described step (3) polishing, cleaning end powder powder, described polishing adopts 400# sand paper, and the water temperature of described cleaning is 40-45 DEG C.
5. a kind of aluminium alloy wheel hub technique for vacuum coating according to claim 1, it is characterized in that: described in described step (4) spraying, oven dry medium powder, baking operation is provided with twice altogether, in baking operation, bake out temperature is 150 DEG C for the first time, drying time is 20-25min, in second time baking operation, bake out temperature is 210 DEG C, and drying time is 30-35min.
6. a kind of aluminium alloy wheel hub technique for vacuum coating according to claim 1 or 5, is characterized in that: described step (4) spraying, dry medium powder described in medium powder and comprises novolac epoxy: 95 parts; Flow agent: 2 parts and defoamer: 2 parts.
7. a kind of aluminium alloy wheel hub technique for vacuum coating according to claim 1, it is characterized in that: described step (5) vacuum plating is carried out in vacuum magnetron sputtering film plating machine, comprise altogether medium powder surface ion bombardment processing and plating material electroplating surface two procedures.
8. a kind of aluminium alloy wheel hub technique for vacuum coating according to claim 7, is characterized in that: during the described medium powder surface ion bombardment processing of described step (5) vacuum plating, described vacuum magnetron sputtering film plating machine vacuum tightness is 9.0 × 10
-3pa, the high-purity argon gas be filled with is 200-500ml, and current settings is 20-25A, and the time length is 150-200s.
9. a kind of aluminium alloy wheel hub technique for vacuum coating according to claim 7, it is characterized in that: in the described plating material electroplating surface operation of described step (5) vacuum plating, described plating material is Alloy Plating material, comprise aluminium, iron, nickel and chromium, electroplating voltage is 600-800V, electric current is 150-160A, and the high-purity argon gas be filled with is 550-600ml, and the time length is 300-320s.
10. a kind of aluminium alloy wheel hub technique for vacuum coating according to claim 1, it is characterized in that: in described step (6) spraying coating varnish, described coating varnish is mainly acrylic resin, dries after spraying, bake out temperature is 150 DEG C, and drying time is 20-25min.
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| CN201510987643.4A CN105525266A (en) | 2015-12-25 | 2015-12-25 | Vacuum coating process for aluminum alloy hub |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106694344A (en) * | 2016-11-28 | 2017-05-24 | 中信戴卡股份有限公司 | Metal protection layer and method for forming metal protection layer |
| CN107583843A (en) * | 2017-08-30 | 2018-01-16 | 孙毅科 | The technique of wheel hub reparation |
| CN108531854A (en) * | 2018-03-21 | 2018-09-14 | 中信戴卡股份有限公司 | A kind of ageing-resistant periodic variable reacts black chromium plated film and forming method |
| CN108546910A (en) * | 2018-03-15 | 2018-09-18 | 中信戴卡股份有限公司 | A kind of method wheel hub ageing-resistant plated film and form the protective film |
| CN109026824A (en) * | 2018-06-29 | 2018-12-18 | 三联泵业股份有限公司 | A kind of split type impeller for large-scale mono-hull Pulp pump |
| CN109355003A (en) * | 2018-09-17 | 2019-02-19 | 东莞星晖真空镀膜塑胶制品有限公司 | A kind of hardware bottle cap product surface treatment process |
| CN109807048A (en) * | 2018-12-29 | 2019-05-28 | 太仓鸿恩电子科技有限公司 | A kind of notebook computer casing automatic vacuum coating process |
| WO2021135511A1 (en) * | 2019-12-31 | 2021-07-08 | 中信戴卡股份有限公司 | Aluminum alloy wheel hub and method for coating surface thereof |
| US11072853B2 (en) | 2018-03-21 | 2021-07-27 | Citic Dicastal Co., Ltd | High-ductility periodic variable alloy protective film and forming method thereof |
| CN114773966A (en) * | 2022-03-31 | 2022-07-22 | 潍坊墨炫轮毂科技有限公司 | Vacuum coating process |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106694344A (en) * | 2016-11-28 | 2017-05-24 | 中信戴卡股份有限公司 | Metal protection layer and method for forming metal protection layer |
| CN107583843A (en) * | 2017-08-30 | 2018-01-16 | 孙毅科 | The technique of wheel hub reparation |
| CN108546910A (en) * | 2018-03-15 | 2018-09-18 | 中信戴卡股份有限公司 | A kind of method wheel hub ageing-resistant plated film and form the protective film |
| CN108531854A (en) * | 2018-03-21 | 2018-09-14 | 中信戴卡股份有限公司 | A kind of ageing-resistant periodic variable reacts black chromium plated film and forming method |
| US10745794B2 (en) | 2018-03-21 | 2020-08-18 | Citic Dicastal Co., Ltd. | Anti-aging periodic variable reaction black chromium coating film and forming method thereof |
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| CN109355003A (en) * | 2018-09-17 | 2019-02-19 | 东莞星晖真空镀膜塑胶制品有限公司 | A kind of hardware bottle cap product surface treatment process |
| CN109807048A (en) * | 2018-12-29 | 2019-05-28 | 太仓鸿恩电子科技有限公司 | A kind of notebook computer casing automatic vacuum coating process |
| WO2021135511A1 (en) * | 2019-12-31 | 2021-07-08 | 中信戴卡股份有限公司 | Aluminum alloy wheel hub and method for coating surface thereof |
| CN114773966A (en) * | 2022-03-31 | 2022-07-22 | 潍坊墨炫轮毂科技有限公司 | Vacuum coating process |
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