CN112030206A - Electroplating process for spectacle frame - Google Patents
Electroplating process for spectacle frame Download PDFInfo
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- CN112030206A CN112030206A CN202010936649.XA CN202010936649A CN112030206A CN 112030206 A CN112030206 A CN 112030206A CN 202010936649 A CN202010936649 A CN 202010936649A CN 112030206 A CN112030206 A CN 112030206A
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D7/00—Electroplating characterised by the article coated
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/36—Removing material
- B23K26/38—Removing material by boring or cutting
- B23K26/382—Removing material by boring or cutting by boring
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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
- C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
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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
- C25D3/00—Electroplating: Baths therefor
- C25D3/02—Electroplating: Baths therefor from solutions
- C25D3/56—Electroplating: Baths therefor from solutions of alloys
- C25D3/565—Electroplating: Baths therefor from solutions of alloys containing more than 50% by weight of zinc
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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
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- Chemical Kinetics & Catalysis (AREA)
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- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Plasma & Fusion (AREA)
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- Electroplating Methods And Accessories (AREA)
Abstract
The invention relates to the technical field of electroplating, and discloses an electroplating process for spectacle frames, which comprises the steps of acid activation treatment, zinc-nickel plating, passivation treatment, drying treatment, punching of a substrate surface layer and micropore filling, wherein the punching of the substrate surface layer comprises the following steps: soaking the washed spectacle frame into deionized water, then performing laser drilling by using a nanosecond laser to form a plurality of micropores on the surface of the spectacle frame, and washing the spectacle frame by using the deionized water after the spectacle frame is processed; filling the micropores: filling the modified chitosan hollow microspheres filled with the zinc-nickel alloy into micropores formed on a spectacle frame by laser drilling in a physical vapor deposition method, compacting, and then soaking the spectacle frame into deionized water at the temperature of 40-50 ℃ for cleaning. After the spectacle frame is electroplated, the adhesion force of the electroplated layer is stronger, and the abrasion resistance of the electroplated layer is better.
Description
Technical Field
The invention relates to the technical field of electroplating, in particular to an electroplating process for a spectacle frame.
Background
The spectacle frame is an important component of the spectacles, mainly plays a role in supporting spectacle lenses, and is mainly made of metal, plastic or resin, natural materials and the like. In order to make the spectacle frame corrosion resistant, wear resistant and beautiful in appearance, an extremely thin metal film layer is generally plated on the surface of the base material of the spectacle frame. Electroplating is a process of plating a thin layer of other metals or alloys on the surface of some metals by using the principle of electrolysis, and is a process of attaching a layer of metal film on the surface of a metal or other material workpiece by using the action of electrolysis so as to play roles of preventing corrosion, improving wear resistance, conductivity and light reflection, enhancing the appearance and the like.
The electroplated layer of the spectacle frame is uniform compared with the hot dipping layer, and is generally thinner, and ranges from 0.5 microns to 5 microns. The thicker the plated same material is, the better the wear resistance of the spectacle frame is, but the higher the cost is. The current electroplating process of the spectacle frame mainly comprises electrophoretic coating, thick gold electroplating, IP vacuum anion electroplating, multilayer coating and the like; the electrophoretic coating is commonly called as water plating, namely an electroplating process for coloring the surface of the spectacle frame by an electrolytic method; the spectacle frame is generally mainly used for spectacle frames made of common alloy materials, and has the advantages of low electroplating cost, rich colors and weak adhesion of electroplated layers, and can be used for about one year generally; other colors are generally discolored after 3-6 months of use. The thick gold electroplating requires that color master is natural metal color, so that the mirror bracket product processed by the process has single color and basically has two colors of gold and silver as main colors. The IP vacuum negative ion electroplating is to form negative ions on the surface of the mirror bracket at high temperature, dissociate in a vacuum furnace, combine with pigment particles, and adsorb on the surface of the mirror bracket through the guidance of a current positive pole and a current negative pole to form an electroplated layer; the method has the advantages that the process is environment-friendly, the adhesion of the electroplated layer is strong, and the phenomenon of decolorization and color fading does not occur after the electroplated layer is normally used for about 24 months; the disadvantages are dark color and bright color electroplating. The multilayer coating comprises two types of spraying and baking paint, wherein the spraying process is mainly used for coating and coloring the outer layer of the student spectacle frame product. Has the advantages of rich and bright colors; the defects of easy decolorization and color loss; the baking finish process is mostly used for fashionable mirror frames, has thick and bright color, and is easy to scratch and fade.
In the aspect of water plating of spectacle frames, patent application No. CN201610215143.3 discloses an electroplating process for spectacle frames, which comprises the following steps: deoiling, electrolytic cleaning, water washing, acid activation, zinc nickel plating, passivation, water washing and drying. Although the technical scheme has high electroplating precision and smooth electroplated surface of the spectacle frame, the spectacle frame still has the common problem of water plating, namely poor adhesion between an electroplated layer and a spectacle frame base material, poor wear resistance, thicker electroplated layer which is thicker can cause higher electroplating cost.
Disclosure of Invention
In view of the above, the present invention is directed to a process for electroplating a spectacle frame, wherein the electroplating layer has a stronger adhesion and better wear resistance after electroplating on the spectacle frame.
The invention solves the technical problems by the following technical means:
an electroplating process for spectacle frames comprises the steps of acid activation treatment, zinc-nickel plating, passivation treatment, drying treatment, punching on the surface layer of a base material and filling micropores,
punching the surface layer of the base material: soaking the washed spectacle frame into deionized water, then performing laser drilling by using a nanosecond laser to form a plurality of micropores on the surface of the spectacle frame, and washing the spectacle frame by using the deionized water after the spectacle frame is processed; after the spectacle frame is drilled by laser, a plurality of micropores are formed on the surface of the spectacle frame, and the solidified modified chitosan hollow microspheres of the zinc-nickel alloy are filled in the micropores, so that the bonding capability of the modified chitosan hollow microspheres of the zinc-nickel alloy and the spectacle frame is stronger;
filling the micropores: filling the modified chitosan hollow microspheres filled with the zinc-nickel alloy into micropores formed on a spectacle frame by laser drilling in a physical vapor deposition method, compacting, and then soaking the spectacle frame into deionized water at the temperature of 40-50 ℃ for cleaning; the modified chitosan hollow microspheres of the zinc-nickel alloy are filled in the micropores, the chitosan has good zinc-nickel adsorption effect, and during electroplating, the zinc-nickel alloy can well deposit zinc and nickel ions in electroplating solution, so that the zinc and nickel ions are firmly electroplated on the spectacle frame, and the zinc and nickel electroplated layers have stronger adhesive force and better wear resistance;
the acid activation treatment comprises the following steps: soaking the washed spectacle frame into 80-150ml/L dilute sulfuric acid for activation for 20-30min, and then soaking the spectacle frame into deionized water for cleaning;
the zinc-nickel plating: presoaking the acid-activated spectacle frame in 30-60ml/L sodium hydroxide solution for 2-4min, and adding Zn of 6-8g/L2+100-130g/L NaOH, 1-2g/L Ni2+The temperature of the electroplating solution is 30-50 ℃, the pH value of the electroplating solution is 10.5-12.5, and the current density is 8-12A/dm2Electroplating for 10-15min under the condition of (1), and finally washing for 10-15min by using deionized water at normal temperature;
and (3) passivating treatment: immersing the spectacle frame plated with zinc and nickel into deionized water, washing for 5-10min by ultrasonic wave with the frequency of 15-18kHz, cleaning after shining for 20min in 1.3mg/L dilute nitric acid solution, and passivating for 45-60s in solution containing 100ml/L passivating agent; then soaking the spectacle frame into deionized water at 20-30 ℃ for washing for 20-30 min;
and (3) drying treatment: and (3) naturally airing the passivated spectacle frame, and then drying the spectacle frame in a drying oven at 90-95 ℃ for 5-10 min.
Further, before the surface layer of the base material is punched, the method also comprises an oil removing treatment step, which specifically comprises the following steps: preparing a cleaning solution with the pH value of 11-13 by using degreasing powder, immersing the spectacle frame into the cleaning solution, controlling the temperature of the cleaning solution to be 50-65 ℃, cleaning and degreasing the spectacle frame for 10-15min under ultrasonic waves with the frequency of 40-45kHz, and then immersing the spectacle frame into deionized water with the water temperature of 50-65 ℃ for washing for 2-3 times.
Further, in the step of perforating the surface layer of the base material, the pulse width of laser for laser perforation is 4-5ns, the wavelength is 650nm, the power is 4-6W, and the repetition frequency is 50-60 kHz.
Further, the power of the laser is 5W, and the height of the spectacle frame base material from the water surface is more than or equal to 30 mm.
Further, the step of plating Zn in the zinc-nickel alloy2+Provided by zinc chloride, said Ni2+Provided by nickel sulphate.
Further, the concentration of the passivating agent is a mixed solution of 20-30g/L chromic acid, 0.8-1.5g/L phosphoric acid, 1-3g/L cobalt sulfate and 10-12g/L sodium silicate.
Further, the preparation method of the modified chitosan hollow microsphere comprises the following steps:
dissolving 10g of chitosan particles in 1000ml of deionized water, and uniformly stirring to obtain a chitosan solution; putting the chitosan solution into an ultrasonic instrument, carrying out ultrasonic treatment at the power of 20-30kHz, adding 50ml of acetic acid, stirring at a low speed for 1h in a water bath kettle at the temperature of 40 ℃, and standing;
adding 50ml of n-hexane into the treated chitosan solution, dropwise adding 10ml of Span80 while stirring for pre-emulsification, then adding 1g of zinc-nickel alloy particles with the particle size of 10-15nm and 0.3g of triethylene tetramine, and continuously stirring for 2 hours; triethylene tetramine is used as a curing agent and can be used for curing the modified chitosan hollow microspheres.
Emulsifying for 15min at the speed of 6000-8000r/min by using a high-speed shearing emulsifying machine to form white emulsion, then dropwise adding 10ml of epoxy chloropropane, and reacting for 5h at the temperature of 30 ℃;
taking out the solution, standing for 30min, leaching with anhydrous ethanol, performing centrifugal separation and washing for several times, and drying in a vacuum oven at 60 ℃ for 3h to obtain the modified chitosan hollow microsphere.
Furthermore, the mass fraction of zinc in the zinc-nickel alloy in the micropore filling is 30%, and the mass fraction of nickel is 70%.
The invention has the beneficial effects that:
according to the invention, firstly, the spectacle frame is perforated by laser, a plurality of micropores are punched on the spectacle frame, chitosan is prepared into hollow microspheres, then zinc-nickel nano particles are filled in the hollow microspheres prepared by chitosan, and finally the modified chitosan hollow microspheres filled with zinc-nickel alloy are filled in the micropores formed on the spectacle frame by laser perforation by adopting a physical vapor deposition method.
Detailed Description
The present invention will be described in detail with reference to examples below:
examples 1,
The preparation method of the modified chitosan hollow microsphere of the embodiment comprises the following steps:
dissolving 10g of chitosan particles in 1000ml of deionized water, and uniformly stirring to obtain a chitosan solution; putting the chitosan solution into an ultrasonic instrument, carrying out ultrasonic treatment at the power of 20-30kHz (25 kHz is preferred in the embodiment), adding 50ml of acetic acid, stirring at a low speed for 1 hour in a water bath kettle at the temperature of 40 ℃, and standing;
adding 50ml of n-hexane into the treated chitosan solution, dropwise adding 10ml of Span80 while stirring for pre-emulsification, then adding 1g of zinc-nickel alloy particles with the particle size of 10-15nm and 0.3g of triethylene tetramine, wherein the mass fraction of zinc in the zinc-nickel alloy is 30%, the mass fraction of nickel is 70%, and continuously stirring for 2 hours;
emulsifying for 15min at 6000-;
taking out the solution, standing for 30min, leaching with anhydrous ethanol, performing centrifugal separation and washing for several times, and drying in a vacuum oven at 60 ℃ for 3h to obtain the modified chitosan hollow microsphere.
Examples 2,
The electroplating process for the spectacle frame comprises the following steps:
oil removal treatment: preparing a cleaning solution with the pH value of 11 by using degreasing powder of the Longfei brand, immersing the spectacle frame into the cleaning solution, heating to ensure that the temperature of the cleaning solution is 50 ℃, cleaning and degreasing for 10min under ultrasonic waves with the frequency of 40kHz, and then immersing the spectacle frame into deionized water with the water temperature of 50 ℃ for washing for 2 times;
punching the surface layer of the base material: soaking the washed spectacle frame into deionized water, then performing laser drilling by using a nanosecond laser to form a plurality of micropores on the surface of the spectacle frame, and washing the spectacle frame by using the deionized water after the spectacle frame is processed; wherein the pulse width of the laser for laser drilling is 4ns, the wavelength is 650nm, the power is 4W, the repetition frequency is 50kHz, and the height of the spectacle frame base material from the water surface is equal to 30 mm;
filling micropores: filling the modified chitosan hollow microspheres filled with the zinc-nickel alloy prepared in the example 1 into micropores formed on a spectacle frame by laser drilling in a physical vapor deposition method, compacting and filling, and then soaking the spectacle frame into deionized water at the temperature of 40 ℃ for cleaning;
acid activation treatment: soaking the washed spectacle frame into 80ml/L dilute sulfuric acid for activation for 20min, and then soaking the spectacle frame into deionized water for washing;
plating zinc and nickel: presoaking the acid-activated spectacle frame in 30ml/L sodium hydroxide solution for 2min, and then adding into electroplating solution containing 6g/L zinc chloride, 100g/L NaOH, and 1g/L nickel sulfate, wherein the electroplating solution temperature is 30 deg.C, pH value is 10.5, and current density is 8A/dm2Electroplating for 10min under the condition of (1), and finally washing for 10min by using deionized water at normal temperature;
passivating: immersing the spectacle frame plated with zinc and nickel into deionized water, washing for 5min by ultrasonic wave with the frequency of 15kHz, cleaning after shining for 20min in a 1.3mg/L dilute nitric acid solution, and passivating for 45s in a solution containing 100ml/L passivator; then, soaking the spectacle frame into deionized water at 20 ℃ for cleaning for 20min, wherein the concentration of the passivating agent is a mixed solution of 20g/L chromic acid, 0.8g/L phosphoric acid, 1g/L cobalt sulfate and 10g/L sodium silicate;
and (3) drying treatment: and (3) naturally airing the passivated spectacle frame, and then drying the spectacle frame in a drying oven at 90 ℃ for 5 min.
Examples 3,
The electroplating process for the spectacle frame comprises the following steps:
oil removal treatment: preparing a cleaning solution with the pH value of 12 by using degreasing powder of a Longfei brand, immersing the spectacle frame into the cleaning solution, heating to ensure that the temperature of the cleaning solution is 60 ℃, cleaning and degreasing for 13min under ultrasonic waves with the frequency of 43kHz, and then immersing the spectacle frame into deionized water with the water temperature of 60 ℃ for washing for 3 times;
punching the surface layer of the base material: soaking the washed spectacle frame into deionized water, then performing laser drilling by using a nanosecond laser to form a plurality of micropores on the surface of the spectacle frame, and washing the spectacle frame by using the deionized water after the spectacle frame is processed; wherein the pulse width of the laser for laser drilling is 4.5ns, the wavelength is 650nm, the power is 5W, the repetition frequency is 55kHz, and the height of the spectacle frame base material from the water surface is 40 mm;
filling micropores: filling the modified chitosan hollow microspheres filled with the zinc-nickel alloy prepared in the example 1 into micropores formed on a spectacle frame by laser drilling in a physical vapor deposition method, compacting and filling, and then soaking the spectacle frame into deionized water at the temperature of 45 ℃ for cleaning;
acid activation treatment: soaking the washed spectacle frame into 110ml/L dilute sulfuric acid for activation for 25min, and then soaking the spectacle frame into deionized water for washing;
plating zinc and nickel: presoaking the acid-activated spectacle frame in 45ml/L sodium hydroxide solution for 3min, and then adding into electroplating solution containing 7g/L zinc chloride, 115g/L NaOH, and 1.5g/L nickel sulfate, wherein the electroplating solution temperature is 40 deg.C, the electroplating solution pH is 11.5, and the current density is 10A/dm2Electroplating for 12min under the condition of (1), and finally cleaning for 12min by using deionized water at normal temperature;
passivating: immersing the spectacle frame plated with zinc and nickel into deionized water, washing for 7min by ultrasonic wave with the frequency of 16.5kHz, cleaning after shining for 20min in 1.3mg/L dilute nitric acid solution, and passivating for 50s in solution containing 100ml/L passivator; then, soaking the spectacle frame into deionized water at 25 ℃ for washing for 25min, wherein the concentration of the passivating agent is a mixed solution of 25g/L chromic acid, 1.2g/L phosphoric acid, 2g/L cobalt sulfate and 11g/L sodium silicate;
and (3) drying treatment: and (3) naturally airing the passivated spectacle frame, and then drying the spectacle frame in a drying oven at 92 ℃ for 7 min.
Examples 4,
The electroplating process for the spectacle frame comprises the following steps:
oil removal treatment: preparing a cleaning solution with the pH value of 13 by using degreasing powder of a Longfei brand, immersing the spectacle frame into the cleaning solution, heating to ensure that the temperature of the cleaning solution is 65 ℃, cleaning and degreasing for 15min under ultrasonic waves with the frequency of 45kHz, and then immersing the spectacle frame into deionized water with the water temperature of 65 ℃ for washing for 3 times;
punching the surface layer of the base material: soaking the washed spectacle frame into deionized water, then performing laser drilling by using a nanosecond laser to form a plurality of micropores on the surface of the spectacle frame, and washing the spectacle frame by using the deionized water after the spectacle frame is processed; wherein the pulse width of the laser for laser drilling is 5ns, the wavelength is 650nm, the power is 6W, the repetition frequency is 60kHz, and the height of the spectacle frame base material from the water surface is 50 mm;
filling micropores: filling the modified chitosan hollow microspheres filled with the zinc-nickel alloy prepared in the example 1 into micropores formed on a spectacle frame by laser drilling in a physical vapor deposition method, compacting and filling, and then soaking the spectacle frame into deionized water at the temperature of 50 ℃ for cleaning;
acid activation treatment: soaking the washed spectacle frame into 150ml/L dilute sulfuric acid for activation for 30min, and then soaking the spectacle frame into deionized water for washing;
plating zinc and nickel: presoaking the acid-activated spectacle frame in 60ml/L sodium hydroxide solution for 4min, and then adding into electroplating solution containing 8g/L zinc chloride, 130g/L NaOH, and 2g/L nickel sulfate, wherein the electroplating solution temperature is 50 deg.C, the pH value is 12.5, and the current density is 12A/dm2Electroplating for 15min under the condition of (1), and finally cleaning for 15min by using deionized water at normal temperature;
passivating: immersing the spectacle frame plated with zinc and nickel into deionized water, washing for 10min by ultrasonic wave with the frequency of 18kHz, cleaning after shining for 20min in a 1.3mg/L dilute nitric acid solution, and passivating for 60s in a solution containing 100ml/L passivator; then, soaking the spectacle frame into deionized water at 30 ℃ for cleaning for 30min, wherein the concentration of a passivating agent is a mixed solution of 30g/L chromic acid, 1.5g/L phosphoric acid, 3g/L cobalt sulfate and 12g/L sodium silicate;
and (3) drying treatment: and (3) naturally airing the passivated spectacle frame, and then drying the spectacle frame in a drying oven at 95 ℃ for 10 min.
Examples 5,
Example 5 is compared to example 3, except that example 5 does not have a substrate skin perforation and microvia filling step, and the other steps and parameters are the same.
Comparative examples,
Comparative example electroplating was carried out for the application of patent application No. CN201610215143.3 mentioned in the background.
In the examples 2 to 5 and the comparative example, the spectacle frames made of the same material were used for electroplating, and the electroplated layer and the adsorption performance were measured after electroplating.
The thickness of the electroplating layer is detected by using FZ/T01003 standard coating fabric thickness test method.
The absorption performance detection uses a bending test, specifically, a steel bar with the diameter of 5mm is used for bending the spleen and the tail of the spectacle frame, and when stripping and peeling phenomena occur, the bending angle is detected.
The results are shown in the following table:
| examples | Coating thickness (micron) | Bending angle (degree) |
| Example 2 | 1.2 | 134 |
| Example 3 | 1.3 | 142 |
| Example 4 | 1.5 | 139 |
| Example 5 | 1.3 | 103 |
| Comparative examples | 2.8 | 98 |
From the measured data of the above embodiment, the invention firstly punches a plurality of micropores on the spectacle frame by laser drilling, prepares chitosan into hollow microspheres, then fills the zinc-nickel nanoparticles into the hollow microspheres, and finally fills the modified chitosan hollow microspheres filled with the zinc-nickel alloy into the micropores formed by laser drilling on the spectacle frame by adopting a physical vapor deposition method.
Although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the spirit and scope of the invention as defined in the appended claims. The techniques, shapes, and configurations not described in detail in the present invention are all known techniques.
Claims (8)
1. An electroplating process for spectacle frames comprises the steps of acid activation treatment, zinc-nickel plating, passivation treatment and drying treatment, and is characterized in that: also comprises the steps of punching the surface layer of the base material and filling micropores,
punching the surface layer of the base material: soaking the washed spectacle frame into deionized water, then performing laser drilling by using a nanosecond laser to form a plurality of micropores on the surface of the spectacle frame, and washing the spectacle frame by using the deionized water after the spectacle frame is processed;
filling the micropores: filling the modified chitosan hollow microspheres filled with the cured zinc-nickel alloy into micropores formed by laser drilling on a spectacle frame by adopting a physical vapor deposition method, compacting, and then soaking the spectacle frame into deionized water at the temperature of 40-50 ℃ for cleaning;
the acid activation treatment comprises the following steps: soaking the washed spectacle frame into 80-150ml/L dilute sulfuric acid for activation for 20-30min, and then soaking the spectacle frame into deionized water for cleaning;
the zinc-nickel plating: presoaking the acid-activated spectacle frame in 30-60ml/L sodium hydroxide solution for 2-4min, and adding Zn of 6-8g/L2+100-130g/L NaOH, 1-2g/L Ni2+The temperature of the electroplating solution is 30-50 ℃, the pH value of the electroplating solution is 10.5-12.5, and the current density is 8-12A/dm2Electroplating for 10-15min under the condition of (1), and finally washing for 10-15min by using deionized water at normal temperature;
and (3) passivating treatment: immersing the spectacle frame plated with zinc and nickel into deionized water, washing for 5-10min by ultrasonic wave with the frequency of 15-18kHz, cleaning after shining for 20min in 1.3mg/L dilute nitric acid solution, and passivating for 45-60s in solution containing 100ml/L passivating agent; then soaking the spectacle frame into deionized water at 20-30 ℃ for washing for 20-30 min;
and (3) drying treatment: and (3) naturally airing the passivated spectacle frame, and then drying the spectacle frame in a drying oven at 90-95 ℃ for 5-10 min.
2. A process for electroplating a spectacle frame as claimed in claim 1, wherein: before the surface layer of the base material is punched, the method also comprises an oil removing treatment step, which specifically comprises the following steps: preparing a cleaning solution with the pH value of 11-13 by using degreasing powder, immersing the spectacle frame into the cleaning solution, controlling the temperature of the cleaning solution to be 50-65 ℃, cleaning and degreasing the spectacle frame for 10-15min under ultrasonic waves with the frequency of 40-45kHz, and then immersing the spectacle frame into deionized water with the water temperature of 50-65 ℃ for washing for 2-3 times.
3. A process for electroplating a spectacle frame as claimed in claim 2, wherein: in the step of perforating the surface layer of the base material, the pulse width of laser for laser perforation is 4-5ns, the wavelength is 650nm, the power is 4-6W, and the repetition frequency is 50-60 kHz.
4. A process for electroplating a spectacle frame as claimed in claim 3, wherein: the power of the laser is 5W, and the height of the spectacle frame base material from the water surface is more than or equal to 30 mm.
5. A process of electroplating a spectacle frame as claimed in claim 4, wherein: zn in the step of zinc-nickel plating2+Provided by zinc chloride, said Ni2+Provided by nickel sulphate.
6. A process of electroplating a spectacle frame as claimed in claim 5, wherein: the concentration of the passivating agent is a mixed solution of 20-30g/L chromic acid, 0.8-1.5g/L phosphoric acid, 1-3g/L cobalt sulfate and 10-12g/L sodium silicate.
7. A process for electroplating a spectacle frame as claimed in claim 6, wherein: the preparation method of the modified chitosan hollow microsphere comprises the following steps:
dissolving 10g of chitosan particles in 1000ml of deionized water, and uniformly stirring to obtain a chitosan solution; putting the chitosan solution into an ultrasonic instrument, carrying out ultrasonic treatment at the power of 20-30kHz, adding 50ml of acetic acid, stirring at a low speed for 1h in a water bath kettle at the temperature of 40 ℃, and standing;
adding 50ml of n-hexane into the treated chitosan solution, dropwise adding 10ml of Span80 while stirring for pre-emulsification, then adding 1g of zinc-nickel alloy particles with the particle size of 10-15nm and 0.3g of triethylene tetramine, and continuously stirring for 2 hours;
emulsifying for 15min at the speed of 6000-8000r/min by using a high-speed shearing emulsifying machine to form white emulsion, then dropwise adding 10ml of epoxy chloropropane, and reacting for 5h at the temperature of 30 ℃;
taking out the solution, standing for 30min, leaching with anhydrous ethanol, performing centrifugal separation and washing for several times, and drying in a vacuum oven at 60 ℃ for 3h to obtain the modified chitosan hollow microsphere.
8. A process for electroplating a spectacle frame as claimed in claim 7, wherein: the mass fraction of zinc in the zinc-nickel alloy in the micropore filling is 30%, and the mass fraction of nickel is 70%.
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| CN202010936649.XA CN112030206A (en) | 2020-09-08 | 2020-09-08 | Electroplating process for spectacle frame |
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| CN202010936649.XA CN112030206A (en) | 2020-09-08 | 2020-09-08 | Electroplating process for spectacle frame |
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