KR20050021716A - Electric coating method for gold color - Google Patents

Abstract

PURPOSE: To provide a gold color electric coating method that obtains gold coating effect by realizing gold color by electric coating, maintains the original coating state for long time by reinforcing strength and life of gold coating compared with conventional gold coating and prevents environmental pollution by consistently filtering and discharging wastewater generated from processes. CONSTITUTION: The electric coating method for gold color comprises: a first pickling process(S100) of washing the coating object after cleaning the surface of a coating object using an acid solution; a pre-degreasing process(S120) of removing oil components of the surface of the coating object by applying an alkali solution to the coating object; an electrolytic degreasing process(S130) of removing contaminants on the surface of the coating object by dipping the coating object into a electrolyte; an alkali copper coating process(S140) of coating copper on the coating object in an alkali solution; a second pickling process(S150) of washing the coating object after dipping the alkali copper coating process completed coating object into an acid solution, thereby cleaning the surface of the coating object; a copper sulfate coating process(S160) of coating copper sulfate on the coating object by dipping the second pickling process completed coating object into a copper sulfate coating solution; a gold color coating process(S180) of coating gold color on the coating object as fixing a reference voltage to a range of 10 to 150V and increasing or decreasing a electrodeposition time between 10 to 120 seconds according to desired color and thickness after dipping the coating object into a bath filled with a mixed solution of an undiluted coating solution, a solvent and three color dyes; a finish degreasing process(S190) of removing residual dross by adding an alkali solution to the gold color coating process completed coating object; and a drying process(S200) of drying the coating object by performing hot air drying, infrared drying or heat drying on the finish degreasing process completed coating object at a temperature of 80 to 120 deg.C.

Description

Gold color electric coating method {ELECTRIC COATING METHOD FOR GOLD COLOR}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrocoating method, and more particularly, to a gold color electrocoating method which improves strength and life without using gold and without generating waste water.

In general, electroplating is a method of being the center of the plating method, and not only pure metals but also alloys are possible. In electroplating, the metal to be plated is used as the cathode, and the metal to be deposited is used as the anode. The electroplating is carried out in an electrolytic solution containing ions of the metal to be electrodeposited. Use it. Common electroplating processes consist of dehydration, polishing, degreasing, chemical dipping, electroplating, post-treatment and drying.

On the other hand, gold plating is a thin coating of gold on the surface of the object, and is widely used for the surface treatment of precious metals such as necklaces, rings, and bracelets.

However, in the conventional gold plating method, since gold must be used as a raw material, the production cost is high and the life of the plating is short because the plating strength is easily degraded. In addition, a large amount of waste water is generated during the process to contaminate the environment.

In order to solve the above problems, an object of the present invention is to provide a gold color electric coating method that can obtain a gold plating effect without using gold.

Another object of the present invention is to provide a gold color electro-coating method that is not altered due to enhanced strength and lifespan.

It is another object of the present invention to provide an environmentally friendly gold color electrocoating method since no waste water is generated during the process.

In order to achieve the above object, the present invention provides an electric coating method comprising: a first pickling process of washing a surface of an object with an acidic solution and then washing with water; A preliminary degreasing step of removing an oil component from the surface by adding an alkali solution to the subject; An electrolytic degreasing step of removing the contaminants on the surface by placing the subject in an electrolyte solution; An alkali copper plating process of copper plating the subject in an alkali solution; A second pickling process of washing the surface by immersing the subject after the alkaline copper plating process in an acidic solution and washing with water; A copper lactic acid plating process of plating the object after the second pickling process into a lactic acid copper plating solution; After the subject is placed in a bath filled with a bath solution mixed with undiluted paint, solvent and tricolor dye, the reference voltage is fixed within the range of 10 to 150 V, and the electrodeposition time is increased or decreased between 10 and 120 seconds depending on the desired color and thickness. A gold color plating process of plating gold on the subject while the gold color is plated; Finishing degreasing to remove residual debris by applying an alkali solution to the gold-plated subject; It provides a gold color electro-coating method characterized in that it comprises a drying process of drying the finished degreasing process through any one or more of hot air drying, infrared drying and heat drying at 80 ~ 120 ℃.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, if it is determined that the detailed description of the related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

1 is a flow chart showing a gold color electrical coating method according to a preferred embodiment of the present invention. As shown in Figure 1, the gold color electro-coating method according to a preferred embodiment of the present invention is a first pickling process (S100), ultrasonic cleaning process (S110), preliminary degreasing process (S120), electrolytic degreasing process (S130), Alkaline copper plating process (S140), secondary pickling process (S150), lactic acid copper plating process (S160), thickness plating process (S170), gold color plating process (S180), finishing degreasing process (S190) and drying process (S200) Include.

(1) 1st pickling process

The first pickling process (S100) is a process of washing the surface of the subject with an acidic solution and then washing with water.

As the acidic solution, lactic acid or hydrochloric acid may be used.

(2) ultrasonic cleaning process

The ultrasonic cleaning process (S110) is a process of washing a subject by putting the subject in an ultrasonic generating tank.

The ultrasonic cleaning process (S110) is a process for improving the plating quality by further cleaning the surface state of the subject, and is a process that can be selectively performed.

(3) preliminary degreasing process

The preliminary degreasing step (S120) is a process of removing an oil component on the surface by applying an alkali solution to the subject.

As the alkali solution, any one of caustic sodium, sodium carbonate, sodium phosphate, sodium silicate, and sodium cyanide may be used, and a small amount of surfactant may be added depending on the application.

(4) electrolytic degreasing process

The electrolytic degreasing process (S130) is a process of removing the contaminants on the surface by putting the subject in the electrolyte.

(5) Alkaline Copper Plating Process

The alkali copper plating process (S140) is a process of copper plating a subject in an alkali solution.

As the alkaline solution, a mixed solution of cyanide, cyanide, and nodangar is used, and a copper plate is used as the positive electrode.

At this time, the electrodeposition time is 10 to 20 seconds, the current amount is adjusted to around 300A.

(6) second pickling process

The second pickling process (S150) is a process of washing the surface by immersing the subject after the alkaline copper plating process in an acidic solution and washing the surface.

As the acidic solution, hydrofluoric acid is used to prevent foreign matters from being neutralized.

(7) Heritage Copper Plating Process

The lactic acid copper plating process (S160) is a process of plating the object after the second pickling process in the lactic acid copper plating solution.

The lactic acid copper plating solution uses a mixed solution of lactic acid, lactic acid copper, and a brightener, and a combined phosphorus copper plate is used as the positive electrode plate. The electrodeposition time is maintained for 10 to 60 minutes, preferably 15 to 45 minutes.

(8) thickness plating process

The thickness plating process (S170) is a process of plating the surface of the object with any one of palladium plating, substitute rhodium plating, and tin plating.

The thickness plating process (S170) is a process for securing the thickness of the subject, and is a process that can be selectively performed.

(9) Gold color plating process

In the gold color plating process (S180), the subject is placed in a bath filled with a bath solution mixed with undiluted paint, a solvent, and a three-color dye, and then the reference voltage is fixed within a range of 10 to 150 V and electrodeposited according to a desired color and thickness. It is a process of gold-plating the subject, increasing or decreasing the time between 10 and 120 seconds.

As the stock solution paint, an acrylic resin paint, an ultraviolet electrodeposition paint, a urethane paint, and a dye-added epoxy paint are used. In addition, the bath solution temperature of the gold color plating process is maintained at 24 to 40 ℃, preferably 24 to 25 ℃.

As the three-color dye, a mixture of red, yellow, and white is used, and the mixing ratio for each color is adjusted according to the plating color (14K to 24K) of the subject.

The gold color plating process (S180) is performed carefully so that the bath never shakes so that plating can be performed smoothly.

In addition, at least two tubs used in the gold color plating process (S180) are interconnected to supply a liquid to the tub, and a plurality of filters to filter the liquid discharged from the tub to the filter tub It is provided. In this way, the gold color plating process (S180) is a continuous liquid filtration by the filter and the filter connected to the tub, so that the waste water does not occur during plating.

(10) finishing degreasing process

The finishing degreasing process (S190) is a process of removing residual debris by applying an alkali solution to the gold-plated subject.

A blue soda solution is used as the alkali solution.

(11) drying process

The drying process (S200) is a process of drying the subject after finishing the degreasing process through any one or more of hot air drying, infrared drying and heat drying at 80 ~ 120 ℃. If the drying temperature is lower than 80 ℃ gold color plating is not stably fixed to the surface of the subject, if the drying temperature is higher than 120 ℃ gold color plating and partial melting phenomenon may occur on the surface of the subject.

The warm air drying is performed at about 80 to 120 ° C. in a warm air dryer, infrared drying at about 140 ° C., and heat drying at about 160 to 180 ° C. in order.

On the other hand, in the case of a gold-color plated member using an ultraviolet paint, ultraviolet drying is performed in about 5 minutes in consideration of heat-weak characteristics.

<Example>

In order to gold-plat 30 gold necklaces, after first pickling and washing with hydrochloric acid, they were placed in an ultrasonic generating tank and subjected to ultrasonic washing. Subsequently, the necklace was put in a solution of blue soda and preliminarily degreased and washed with water, and then put into an electrolyte solution and subjected to electricity to perform electrolytic degreasing. Subsequently, the necklace was placed in a mixed solution of blue soda, blue chrysanthemum, and nodangar, and subjected to copper plating for 10 seconds with a current of 300 A. Subsequently, the necklace was placed in a mixed solution of lactic acid, lactic acid copper, and a polisher, followed by lactic copper plating for 30 minutes using a copper-plated copper plate as a pole plate, followed by additional palladium plating to secure thickness. Subsequently, the collar was placed in a solution of 25 L of acrylic resin paint, 70 L of water, 5 L of solvent, and 200 g of dye, and subjected to continuous filtration, followed by applying 100 V voltage and 15 A current to perform gold color plating for 30 seconds. Subsequently, the necklace was immersed in a 10% solution of sodium cyanide, immersed for 30 seconds, washed three times, and subjected to primary drying in a warm air dryer, secondary drying in an infrared dryer, and a heat dryer.

As described above, the gold color electro-coating method according to the embodiment of the present invention can achieve the effect of gold plating without gold by realizing the gold color using paint, thereby significantly lowering the production cost of gold-plated products and popularizing gold-plated products. There is an effect that can be activated.

In addition, the gold color electro-coating method according to an embodiment of the present invention is more than 10 times the strength and lifespan compared to the conventional gold plating, there is an effect that can maintain the original plating state for a long time without alteration.

In addition, the gold color electro-coating method according to an embodiment of the present invention has an effect of providing an environmentally friendly process without the discharge of waste water by continuously filtration discharged waste water generated in the process.

1 is a flow chart showing a gold color electrical coating method according to a preferred embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

S100: first pickling process S110: ultrasonic cleaning process

S120: preliminary degreasing process S130: electrolytic degreasing process

S140: Alkaline Copper Plating Process S150: Second Pickling Process

S160: lactic acid copper plating process S170: thickness plating process

S180: Gold color plating process S190: Finish degreasing process

S200: Drying Process

Claims (5)

In the electric coating method, A first pickling process of washing the subject with an acidic solution and then washing with water; A preliminary degreasing step of removing an oil component from the surface by adding an alkali solution to the subject; An electrolytic degreasing step of removing the contaminants on the surface by placing the subject in an electrolyte solution; An alkali copper plating process of copper plating the subject in an alkali solution; A second pickling process of washing the surface by immersing the subject after the alkaline copper plating process in an acidic solution and washing with water; A copper lactic acid plating process of plating the object after the second pickling process into a lactic acid copper plating solution; After the subject is placed in a bath filled with a bath solution mixed with undiluted paint, solvent and tricolor dye, the reference voltage is fixed within the range of 10 to 150 V, and the electrodeposition time is increased or decreased between 10 and 120 seconds depending on the desired color and thickness. A gold color plating process of plating gold on the subject while the gold color is plated; A finishing degreasing step of removing residual debris by adding an alkali solution to the gold-plated subjects; A gold color electro-coating method comprising a drying step of drying the finished degreasing process through any one or more of hot air drying, infrared drying and thermal drying at 80 to 120 ℃. The method of claim 1, At least two tubs used in the gold color plating process are interconnected with at least two filter barrels for supplying the liquid to the tub, and a plurality of filters for filtering the liquid discharged from the tub and supplying the filter barrel to each other. Gold color electric coating method made with. The method of claim 1, After the first pickling process, the gold color electro-coating method, characterized in that for performing an additional ultrasonic cleaning process to wash the subject in the ultrasonic generating tank. The method of claim 1, After the lactic copper plating process, a gold color electroplating method, further comprising a thickness plating process for plating the surface of the object with any one of palladium plating, substitute rhodium plating, and tin plating. The method of claim 1, Gold color electroplating method characterized in that the bath solution temperature of the gold color plating process maintains 24 ~ 40 ℃.