KR101801331B1 - Electrodeposition coating method - Google Patents

Abstract

The present invention relates to an electrodeposition coating method, more specifically, which comprises the following steps of: preparing a coated base material; electrodeposition coating a surface of the coated base material; and hardening the electrodeposition coated base material. According to the present invention, regardless of a material of a base material, electrodeposition coating is possible, and the whole process is suitable for an automated line to shorten processes. Moreover, a loss of paint is minimized, and further, a paint film thickness is uniform. An adhering force of a paint film can be improved.

Description

Electrodeposition coating method [0002]

The present invention relates to an electrodeposition coating method, and more particularly, to an electrodeposition coating method capable of performing electrodeposition coating irrespective of a material of a base material by performing electrodeposition coating on a plated base metal, and improving adhesiveness, abrasion reliability, pencil hardness, .

In general, the coating is not limited to basic decorative properties and corrosion resistance, but also mechanical properties such as hardness, abrasion resistance, lubricity and durability, electrical characteristics such as conductivity, contact property, magnetic property, high frequency property, resistance property, electromagnetic shielding property, And is widely used for automobile parts, electronic parts, semiconductor parts, and various mechanical parts because it provides optical properties such as heat resistance and water absorption, and physical properties such as solderability, bonding property and adhesiveness.

Conventional deposition, spray painting, and electrodeposition coating methods have been performed by such a coating method.

First, the deposition, that is, the dry plating method, is a method in which a metal is vacuum-adhered to a substrate and a colored coating is sprayed thereon. The deposited metal is very thin, the coating layer is thick, All have a disadvantage in that they are not uniform, are limited in size and shape, are not mass-producible, have high initial facility investment costs, and have a high defect rate.

In addition, the spray coating method is a method of directly spraying a coating material having color on a substrate, which is also uneven in thickness and has a disadvantage of many defects.

The electrodeposition coating method is a coating method for electrically depositing a coating film on the surface of a substrate through a direct current between the substrate and the counter electrode by using a coating material as an anode or a cathode in a water-soluble coating solution for electrodeposition. There is an easy aspect in the management and color implementation, but it must be a conductive substrate and has a problem in that reliability is inferior in terms of vibration wear. That is, when the electrodeposition coating is directly applied on the material, the adhesion is remarkably deteriorated.

As a pretreatment of the electrodeposition coating, a method of imparting corrosion resistance and adhesion to the coating by forming a corrosion-resistant phosphate coating on the metal surface of the substrate is used for imparting the adhesion and the corrosion resistance.

However, when the phosphate coating is formed, the process is complicated and a separate pretreatment is required for forming a film.

KR 10-1296868 B1 KR 10-1219712 B1

Accordingly, an object of the present invention is to solve the disadvantages of the electrodeposition coating described above, in which metal is plated on a surface of a substrate, and electrodeposition is performed thereon, thereby enhancing adhesion with the substrate.

In addition, electrodeposition coating can be performed irrespective of the material of the base material by plating a metal on the surface of the substrate and using a low-temperature thermosetting electrodeposition coating or a UV-curing electrodeposition coating, so that excellent adhesion can be obtained even without forming a phosphate coating will be.

According to another aspect of the present invention, there is provided an electrodeposition coating method comprising the steps of preparing a coated base metal, electrodepositing a surface of the coated base metal, and curing the electrodeposited coated base metal .

The method of claim 1, wherein the plated base metal is a copper, nickel, and chromium-plated base metal. The method comprises: peeling chromium from the plated base metal after preparing the plated base metal; The method of claim 1, further comprising the steps of: immersing the first acid soaked plating base material in a second acid-soaked water; and washing the second acid-soaked plating base material, The step of curing the plated base material by electrodeposition may include washing the base material subjected to electrodeposition coating with water and performing a water repellent treatment and then subjecting the base material subjected to water repellency treatment to hot air drying and UV curing .

Wherein the plated base metal is copper, nickel, and chrome-plated base metal. The method includes: alkali-degreasing the plated base metal to remove oil and foreign matter after preparing the plated base metal; A step of washing with water, a step of washing with water, a step of washing with water, a step of washing with water, a step of washing with water and washing with water, Wherein the step of curing the plated base material by electrodeposition coating the base material subjected to electrodeposition coating with water is subjected to water repellency treatment and the water repellent base material is subjected to water repellent treatment, And is characterized by hot air curing.

The cationic low-temperature thermosetting electrodeposition coating material is curable at a temperature of 100 to 125 ° C, and the hot-air curing is cured by hot air at a temperature of 100 to 125 ° C for 40 to 60 minutes.

Wherein the plated base metal is a copper and nickel-plated base metal, the step of alkali-degreasing the nickel base metal to remove the nickel passivation film after the step of preparing the plated base metal, The method according to any one of claims 1 to 3, further comprising a step of acid dipping and a step of washing the acid-soaked plating base material, wherein the electrodeposition coating step comprises electrodepositing the washed base metal material with a UV curable electrodeposition coating or a cationic low temperature thermal curable electrodeposition coating .

The base material is a plastic material.

The base material is characterized by being one of ABS, PC, and a mixed material thereof.

The thickness of the plated layer of the plated base material is 10 to 100 占 퐉, and the thickness of the electrodeposition coated paint layer is 15 to 40 占 퐉.

According to the present invention, electrodeposition coating is possible regardless of the material of the base material, and the entire process is suitable for an automated line, thereby shortening the process, minimizing the loss of the paint, ensuring that the film thickness is uniform, And the like.

1 is a process diagram of an electrodeposition coating according to the present invention.
2 is a process diagram showing a method for electrodepositing a copper, nickel, and chromium-plated base material according to the present invention with a UV curable electrodeposition paint.
3 is a process diagram showing a method for electrodepositing a copper, nickel, and chromium-plated base material according to the present invention by using a low temperature thermal curing type electrodeposition coating.
4 is a process diagram showing a method of electrodepositing a base material plated with copper and nickel according to the present invention using a UV curable electrodeposition paint.
5 is a process diagram showing a method of electrodepositing a base material plated with copper and nickel according to the present invention with a low temperature thermal curing type electrodeposition coating.
6 is a photograph showing a painted product according to Embodiment 1 of the present invention.

Hereinafter, the present invention will be described in detail.

The most remarkable feature of the present invention is that the electrodeposition coating can be performed irrespective of the type of the base material by plating the base material and performing the electrodeposition coating thereon and the thickness of the electrodeposition coating can be made uniform through the plated base material, It is possible to increase the thickness of the film.

Further, even if a separate phosphate coating is not formed, sufficient adhesion of paint can be ensured through the plated base metal.

The electrodeposition plating method of the present invention comprises the steps of preparing a plated base metal as shown in Fig. 1, electrodepositing a surface of the plated base metal, and curing the electrodeposited coated base metal .

In the present invention, the base material may be any one of a plastic material, more preferably ABS, PC, and a mixture thereof, and the plating may be copper and nickel plating or copper, nickel and chromium plating.

The thickness of the plated layer of the plated base material is preferably 10 to 100 탆, and the thickness of the electrodeposition coated coating layer is preferably 15 to 40 탆.

The present invention can be classified in more detail according to the kinds of the plating material and the electrodeposition coating material. The present invention can be applied to electrodeposition coatings of copper, nickel and chromium-plated base materials with a UV curable electrodeposition coating, a method of coating copper, nickel and chromium- A method of electrodeposition with a curing type electrodeposition coating, a method of electrodepositing a base material plated with copper or nickel with a UV curing type electrodeposition coating, a method of electrodepositing a base material plated with copper or nickel with a low temperature thermal curing type electrodeposition coating .

First, referring to FIG. 2, a method of electrodepositing a copper, nickel, and chromium-plated base material using a UV curable electrodeposition coating will be described in detail.

The method according to the present invention comprises the steps of preparing copper, nickel and chromium-plated preform, peeling chromium from the plated preform, washing the chromium-plated preform with water and primary acid dipping, A step of subjecting the base material to dipping in a primary acid-soaked plating bath followed by secondary acid soaking, washing the base material with the secondary acid soaked, electrodepositing the washed base material with a UV curable electrodeposition coating agent, And water-repellent and water-repellent to the electroformed base material, and drying the hot-air-dried base material after UV-curing the water-repellent base material.

Copper, nickel and chrome plated Base material  Step to prepare.

First, prepare copper, nickel, and chromium-plated base metal.

Here, the plating method of the base material is not limited, and may be accomplished through a variety of conventionally known methods. That is, the plating base material is prepared through a process of degreasing, etching, first activation, second activation, chemical nickel film formation and plating, for example.

In the present invention, the base material may be directly plated through the above-described process, or a commercially available plated base material may be applied, and its implementation is not limited.

However, in the present invention, the base material may be a plastic material, especially ABS, PC, or a mixture thereof, and plated with copper, nickel and chromium. The base material may be a stainless steel (SUS) material.

That is, since the electrodeposition coating can be performed by plating, the present invention is advantageous in that electrodeposition coating can be performed even if the base material is not a conductor. Therefore, SUS material as base metal. In addition, since the adhesion and uniformity of the electrodeposition coating can be sufficiently secured by such plating, there is also an advantage that the formation of the phosphate film, which is conventionally performed in the electrodeposition coating pretreatment step, can be omitted.

However, in the present invention, the thickness of the plating layer is preferably about 10 to 100 mu m so as to improve the corrosion resistance due to a sufficient plating layer and ensure adhesion with the electrodeposition coating layer. That is, when the thickness of the plating layer is less than 10 mu m, it is difficult to improve the adhesion with the electrodeposition layer and the corrosion resistance.

In addition, it is a matter of course that the material of aluminum die casting and zinc die casting which is sensitive to temperature as well as base material of plastic or SUS material is also applicable to base material.

The plated From the base material  Step of peeling chromium.

Next, the prepared plating base material is subjected to alkali electrolytic peeling and chromium peeling to improve the adhesion of the electrodeposition coating layer.

Here, the alkali electrolytic peeling method is a method of electrolytically peeling a copper foil by immersing in 50 to 150 g / l of potassium hydroxide or sodium hydroxide at a temperature of 40 to 70 캜 for 2 to 3 minutes while applying a voltage of 4 to 6 V for 1 to 5 minutes Peel off.

In the present invention, when the above-mentioned alkali electrolytic peeling is out of the above-mentioned condition, the process efficiency is lowered or sufficient peeling is not performed, and the adhesion of the coating is lowered.

The chromium Peeled  Plated Base material Washed  Primary mountain Soaked  step.

Next, the chrome plated base metal is washed with water to remove the alkali component remaining on the surface.

The washing with water is carried out in three stages of water washing. The water washing can be performed by automatic washing with a method such as bath immersion or spraying using purified water, and various known methods and conditions can be applied to such water washing method.

Then, the above-mentioned washed base metal is immersed in primary acid to remove the alkali passive film on the surface of the base metal. Such acid dipping is a process for removing an alkali passivation film caused by the alkali treatment to maintain a stable surface state, thereby enhancing the adhesion of the electrodeposition coating and forming a uniform coating.

The primary acid dipping is performed by immersing the above-mentioned washed plating base material at a temperature of 25 to 100 g / l of sulfuric acid and a temperature of 20 to 32 ° C and applying a voltage of 2 to 5 V for 1 to 5 minutes. The surface of the base material may be damaged due to excessive acid dipping, or the passivation film may not be sufficiently removed, resulting in non-uniform coating. Therefore, it is preferable to immerse the substrate in the above-described conditions.

The primary acid Immersed  Plated Base material Washed  Secondary mountain Soaked  step.

Next, the primary acid-soaked plating base material is washed with water to remove the residual acid solution on the surface of the primary acid-soaked plating base material. In this step, the acid solution is sufficiently removed through the three-stage water washing, and it is sufficient that the water is automatically rinsed by using the purified water in a bath soaking or spraying method.

Then, the washed plating base material is dipped in a secondary acid to remove the remaining coating film on the surface of the plating base material.

The secondary acid dipping is performed by immersing the above-mentioned washed plating base material at a temperature of 30 to 100 ml / l of hydrochloric acid and a temperature of 20 to 32 ° C, and applying a voltage of 2 to 5 V for 1 to 5 minutes.

The secondary acid Immersed  Plated Base material Washed  step.

Next, the secondary acid soaked plating base material is washed with water.

As described above, the washing with water is carried out in three stages of water washing, and it is sufficient that the water is automatically washed using a method such as bath immersion or spraying using purified water.

remind Washed  Plated Base material  Electrodeposition coating with UV curable electrodeposition coating.

Next, the washed plating base material is electrodeposited with a UV curable electrodeposition coating.

The above-mentioned electrodeposition coating is a method in which a coating film is formed on the surface of a plating base material, which is an anode, by passing the current through the electrodeposition paint in the tank using the washed base metal as a cathode and the tank as an anode.

The electrodeposition coating is preferably performed by applying a voltage of 30 to 70 V for 60 to 120 seconds at a pH of 3.5 to 4.5 and a temperature of 24 to 26 ° C. The amount of the UV curable electrodeposition coating used is 160 to 180 g / And the type thereof can be selected from among cationic epoxy and cationic acrylic, and it is natural that a variety of dyes can be selected in the color thereof.

Here, when the condition of the electrodeposition coating is out of order, the adhesion to the plating base material may be inferior or the thickness of the coating layer may not be secured sufficiently. Therefore, electrodeposition coating is performed under the above conditions.

At this time, the thickness of the formed coating layer may be about 15 to 40 占 퐉, and the thickness of the coating layer may be increased due to the plating layer.

The detailed principles of the electrodeposition coating, that is, the electrophoresis reaction, the electrolytic reaction, the electroosmotic reaction, and the like, are well known in the field to which this technique belongs, and therefore, detailed description thereof will be omitted.

The electrodeposition Painted Base material Washed Water repellent treatment , remind Water-repellent Base material  UV curing after hot air drying.

Next, the electroformed coated base material is washed with water and subjected to water-repellent treatment.

At this time, the detailed conditions of the flushing are not limited, and the known conditions are sufficient. However, by proceeding to the UF 1 washing, UF 2 washing, UF 3 washing and pure washing using the UF filter, the remaining drug is sufficiently removed from the electroplated coating base material, the solid component is recovered through the UF filter, .

The water-repellent electrodeposited plating base material is subjected to water repellency treatment to improve water flowability. The water-repellent treatment is a step of precipitating the electrodeposited plating base material into a water-repellent agent, which is carried out at a room temperature for 10 to 60 seconds to a known water-repellent agent.

Next, the water-repellent electroplated plating base material is hot-air dried. The hot air drying is performed at a temperature of 70 to 80 ° C for 10 to 20 minutes to remove moisture on the surface of the electroplated plating base material.

Finally, the hot-air dried electrodeposited plating base material is UV-cured using UV irradiation energy. The UV curing is performed by irradiating a mercury lamp with a wavelength of 250 to 450 nm or an irradiation energy having a wavelength of 40 to 120 Watts / cm with an irradiation energy of 2 to 4 JN / cm 2 for 2 to 3 minutes. It is a condition that is not overcured without being caused.

Although it is not described separately, it is a matter of course that a solvent recovery tank is provided at the water washing and chemical treatment (acid and alkali treatment) stages, and the solvent can be recovered by using the UF filter. And therefore, a detailed description thereof will be omitted.

The electrodeposition coating method according to the above-described method is advantageous in that the coating can be applied irrespective of the type of the base material, the thickness uniformity of the coating layer is excellent, and the adhesion is excellent. In addition, since the whole process can be automated, there is a characteristic that the mass productivity is excellent and the productivity is low.

Hereinafter, with reference to FIG. 3, a method of electrodepositing a copper, nickel, and chromium-plated base material with a cationic low-temperature curing paint will be described in detail. For the sake of convenience of explanation, the description of the method described above with reference to FIG. 2, which is the same as the method using the UV curable electrodeposition coating, will be omitted.

The method according to the present invention comprises the steps of: preparing a copper, nickel and chromium-plated base material; alkaline degreasing the plated base material to remove oil and foreign matter; washing the alkaline degreased base material with water to remove primary acid A method of manufacturing a plating bath, comprising the steps of: immersing a base material submerged in a primary acid-soaked plating bath in a secondary acid soaking step; And a step of water-repellent and water-repellent treatment of the electroplated and plated matrix material, and hot-air curing the water-repellent base material.

Copper, nickel and chrome plated Base material  Step to prepare.

First, prepare copper, nickel, and chromium-plated base metal.

This step is the same as the above-described method using the UV curable electrodeposition paint, so that a detailed description thereof will be omitted. The thickness of the plated layer of the plated base material and the base material are also the same as the method using the UV curable electrodeposition coating.

The plated Base material  Alkaline degreasing Oil  And removing foreign matter.

Next, the plated base metal is degreased with alkali to remove oil and foreign substances on the surface of the plated base metal to improve the adhesion of the electrodeposition coating layer. In other words, chromium had to be peeled off when the preceding UV-curable electrodeposition coating was used. However, when a cationic low-temperature thermosetting electrodeposition coating is used, an electrodeposition coating layer can be formed only by removing oil and foreign substances from the surface without removing the chromium have.

The alkali degreasing may be carried out by immersing in the range of 50 to 150 g / l of potassium hydroxide or sodium hydroxide at a temperature of 40 to 70 캜 for 2 to 3 minutes to degrease.

The alkali degreased plating Base material Washed  Primary mountain Soaked  step.

Next, the alkali-degreased plated base material is washed with water and immersed in primary acid to remove the alkali passive film. This step is the same as the method using the preceding UV curable electrodeposition coating.

The primary acid Immersed  Plated Base material Washed  Secondary mountain Soaked  step.

Then, the primary acid-soaked plating base material is washed with water and then subjected to secondary acid soaking to remove the coating film on the surface of the base material. This step is also the same as the method using a UV curable electrodeposition coating.

The secondary acid Immersed  Plated Base material Washed  step.

Then, the secondary acid soaked plating base material is washed with water. This step is also the same as the method using the above UV curable electrodeposition coating.

remind Washed  Plated Base material  Electrodeposition coating with cationic low temperature thermosetting electrodeposition coating.

Next, the washed plated base material is electrodeposited with a cationic low-temperature thermal curable electrodeposition coating.

The electrodeposition coating is preferably performed by applying a voltage of 30 to 50 V for 60 to 120 seconds at a pH of 4 to 5 and a temperature of 24 to 30 캜 for electrodeposition coating, Ml / l. The cationic low-temperature thermosetting electrodeposition coating composition is preferably a low-temperature thermosetting electrodeposition coating composition which can be cured at a temperature of 100 to 125 ° C, more preferably about 105 ° C. As such a low temperature thermosetting electrodeposition coating material, an acrylic electrodeposition coating material can be used, and it is selected and used in consideration of a curing temperature in a known low temperature thermosetting electrodeposition coating material.

At this time, the thickness of the formed coating layer may be about 15 to 40 占 퐉, and the thickness of the coating layer may be increased due to the plating layer.

The electrodeposition Painted  Plated Base material Washed Water repellent treatment , remind Water-repellent Base material  Hot air curing step.

Next, the electroplated and plated base metal is washed with water, subjected to a water-repellent treatment, and hot-air cured. The water and water repellent treatment is the same as the above-mentioned UV curable electrodeposition coating, and the hot air curing is performed by hot air curing at a temperature of 100 to 125 ° C, more preferably about 105 ° C for 40 to 60 minutes.

Also, it is natural that this method can also provide a separate solvent recovery tank in each of the water washing step and the chemical treatment (acid and alkali treatment), and recover the solvent using the UF filter.

The electrodeposition coating method according to the above-described method is advantageous in that the coating can be applied irrespective of the type of the base material, the thickness uniformity of the coating layer is excellent, and the adhesion is excellent. In addition, since the whole process can be automated, there is a characteristic that the mass productivity is excellent and the productivity is low.

In the meantime, although the present invention has been described by taking chromium plating as an example, the present invention can also be applied to copper and nickel-plated base materials without chromium plating. In this method, copper and nickel- A step of alkali degreasing the nickel plated base material to remove the nickel passive film; a step of acid dipping the alkaline degreased plated base material after water rinsing; a step of washing the base material immersed in acid; And electrodepositing the coated base material using a UV curable electrodeposition coating or a cationic low temperature thermal curable electrodeposition coating.

That is, copper and nickel-plated base materials are prepared and alkali-degreased to remove the passive film of nickel. At this time, the alkali degreasing method may suffice to immerse in 50 to 150 g / l of potassium hydroxide or sodium hydroxide at a temperature of 40 to 70 캜 for 2 to 3 minutes.

Then, it is washed with water and immersed in acid. At this time, the washing with water and the acid immersion method are the same as the washing and the primary acid immersion in the method using the above-mentioned UV curing type electrodeposition coating.

Next, the acid-dipped plating base material is washed with water and electrodeposited. This step is the same as the electrodeposition coating method using the UV curable electrodeposition coating and the electrodeposition coating method using the cationic low temperature thermal curable electrodeposition coating, and a detailed description thereof will be omitted.

2 to 4, a method of performing electrodeposition coating on a copper, nickel, chromium-plated base material and a copper and nickel-plated base material has been described. However, in the case of the base material plated with various metals, It is natural that the electrodeposition coating can be carried out by using the same method as the above.

The product manufactured by the above method has a wide color range and is excellent in covering property and can be used as general industrial products as well as sporting goods, slot machine parts, and cosmetic case as well as automobile interior parts .

Hereinafter, the electrodeposition coating method of the present invention will be described in more detail with reference to examples.

(Example 1)

The base material of the ABS material was plated with copper, nickel and chromium to a thickness of 20 탆. The above plating method was performed according to a conventional method. Then, chrome was peeled from the base material of the plated ABS material. The chrome was peeled by alkali electrolytic peeling, and the plated base material was immersed in a bath at a voltage of 4 V for 1 minute at a temperature of 55 ° C of 50 g / liter of KOH. Next, the chromium-removed plated parent material was washed three times with purified water. The washed base material was immersed in a bath of 75 g / L sulfuric acid at 30 DEG C and a voltage of 4 V for 1 minute. The washed plated base material was immersed in a bath of 50 ml / l of hydrochloric acid at 30 ° C and a voltage of 4 V for 1 minute, and then rinsed three times with purified water.

Next, electrodeposition coating was performed on the washed base material. The electrodeposition coating was carried out under the conditions of 25 DEG C and pH 4.1 at 45 DEG C under the conditions of 25 DEG C and pH 4.1 using a washed base material as a negative electrode and a tank as an anode and UV curing type cationic acrylate (amount: 170 g / The voltage was applied for 100 seconds. The thickness of the electrodeposition coating layer was 20 탆.

Next, this was washed with UF three times, purified water was finally poured into pure water, then precipitated in a water repellent at 28 DEG C for 30 seconds, hot-air dried at 75 DEG C for 10 minutes, and irradiated with energy of 4JN / And cured for 2 minutes.

(Example 2)

The base material of the ABS material was plated with copper, nickel and chromium to a thickness of 20 탆. The above plating method was performed according to a conventional method. The base material of the plated ABS material was subjected to alkali degreasing. The alkaline degreasing was performed by immersing in KOH at 55 캜 for 2 minutes at 50 g / l. The washed base material was immersed in a bath of 75 g / L sulfuric acid at 30 DEG C and a voltage of 4 V for 1 minute. The washed plated base material was immersed in a bath of 50 ml / l of hydrochloric acid at 30 ° C and a voltage of 4 V for 1 minute, and then rinsed three times with purified water.

Next, electrodeposition coating was performed on the washed base material. The electrodeposition coating was carried out under the conditions of 25 占 폚 and pH 3.7 at a temperature of 25 占 폚, using a washed base material as a negative electrode and a tank as an anode, and using a cationic low-temperature thermosetting type acrylic (amount: 180 ml / liter, Daesung Chemical) A voltage of 35 V was applied for 100 seconds. The thickness of the electrodeposition coating layer was 20 탆.

Next, this was washed with UF three times, purified water was finally poured into pure water, and then precipitated in a water repellent at 28 DEG C for 30 seconds, followed by hot air curing at 105 DEG C for 60 minutes.

The appearance of the finished product thus coated was observed, and the properties thereof were evaluated by the evaluation method shown in Table 1 below.

Evaluation methods and results of Examples 1 and 2 Item Example 1 Example 2 Assessment Methods Pencil hardness (1) 2H 3H (1 kg load) Hardness at which scratches are recognized Pencil hardness (2) 4H 5H (1 kg load) Hardness at which the coating film is broken UV resistance 720 hr 720 hr ISO 11507 Weathering Watertightness test clear clear 10days 40 ℃ Hardening resistance clear clear 600 acetone rubs Corrosion resistance (CASS) clear clear 120hrs 10/10 Salt spray (NSS) clear clear 500 hr

As can be seen from Table 1, the electrodeposition coating method according to the present invention has excellent coating performance.

Fig. 5 is a photograph of a product according to Example 1 of the present invention. As a result, it was confirmed that the appearance of the product was good and there was no surface defect.

It will be understood by those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. The scope of the present invention is defined by the appended claims rather than the foregoing detailed description, and all changes or modifications derived from the meaning and scope of the claims and the equivalents thereof are included in the scope of the present invention Should be interpreted.

Claims (8)

delete Preparing a plated preform,
Electrodepositing a surface of the plated base metal;
And curing the electroplated and painted plated base material,
The plated base metal is a copper, nickel and chromium-plated base metal,
After the step of preparing the plated preform,
Peeling the chrome from the plated base metal;
Subjecting the chrome-plated preform to washing with water and primary dipping;
A step of washing the pre-soaked plating base material with water and then dipping the pre-
Further comprising washing the secondary acid soaked plating base material with water,
Wherein the electrodeposition coating step comprises:
The washed base material is electrodeposited with a UV curable electrodeposition coating,
Wherein the step of curing the electrodeposited coated base metal comprises:
Wherein the electrodeposition coated base material is washed with water to perform water repellency treatment, and the water repellent base material is subjected to hot air drying and UV curing.
Preparing a plated preform,
Electrodepositing a surface of the plated base metal;
And curing the electroplated and painted plated base material,
The plated base metal is a copper, nickel and chromium-plated base metal,
After the step of preparing the plated preform,
Alkali-degreasing the plated base material to remove oil and foreign matter,
Subjecting the alkali-degreased plated base material to washing with water and primary acid soaking,
A step of washing the pre-soaked plating base material with water and then dipping the pre-
Further comprising washing the secondary acid soaked plating base material with water,
Wherein the electrodeposition coating step comprises:
The above-mentioned washed base material is electrodeposited with a cationic low-temperature thermal curable electrodeposition coating,
Wherein the step of curing the electrodeposited coated base metal comprises:
Wherein the electrodeposition coated base material is washed with water to perform a water repellent treatment, and the water repellent base material is hot-air cured.
The method of claim 3,
The cationic low temperature thermosetting electrodeposition coating composition is curable at a temperature of 100 to 125 캜,
Wherein the hot air curing is performed by hot air at a temperature of 100 to 125 占 폚 for 40 to 60 minutes.
Preparing a plated preform,
Electrodepositing a surface of the plated base metal;
And curing the electroplated and painted plated base material,
The plated base metal is a copper and nickel plated base metal,
After the step of preparing the plated preform,
Removing the nickel passivation film by alkali degreasing the plated base metal;
Acid-dipping the alkali-degreased plated base material after washing with water,
Further comprising washing the acid-soaked plating base material,
Wherein the electrodeposition coating step comprises:
Wherein the washed base material is electrodeposited with a UV curable electrodeposition coating or a cationic low temperature thermal curable electrodeposition coating.
6. The method according to any one of claims 2 to 5,
Wherein the base material is a plastic material.
The method according to claim 6,
Wherein the base material is one of ABS, PC, and a mixed material thereof.
The method according to claim 6,
The thickness of the plating layer of the plated base metal is 10 to 100 탆,
Wherein the electrodeposited coating layer has a thickness of 15 to 40 占 퐉.

Images