CN105018995A - Silver ornament surface brightness five-layer electroplating technology - Google Patents

Abstract

The invention discloses a silver ornament surface brightness five-layer electroplating technology, and relates to silver electroplating technologies, in particular to a five-layer electroplating technology for silver ornaments with brightness surfaces. The technology includes the following five steps that 1, the silver ornaments are treated before electroplating; 2, the silver ornaments are electroplated; 3, palladium is electroplated on the silver ornaments; 4, platinum is electroplated on the silver ornaments; and 5, aftertreatment is conducted on the electroplated silver ornaments. The technology solves the problems that the silver ornaments are low in durability, prone to oxidation and the like due to a silver ornament surface three-layer electroplating method in the prior art.

Description

Silver jewelry surface bright five-layer electroplating process

technical field

The invention relates to a silver electroplating process, in particular to a five-layer electroplating process for bright silver ornaments.

Background technique

Silver is a precious metal with a long history of application, and its content in the earth's crust is very small, accounting for only 0.07ppm. Pure silver is a beautiful silver-white metal. Its jewelry and utensils have good reflectivity and can be polished after polishing. It achieves high brilliance and is widely used in jewelry and home decoration. Plating a layer of silver on the surface of some metals can also achieve the decorative effect of pure silver. The non-bright silver plating process used in the past has poor appearance, low corrosion resistance, especially poor anti-sulfur and anti-tarnish ability. In order to shine, chemical polishing or copper brushing is usually used to immerse silver, which wastes electricity and time. , and pollute the environment.

Most of the prior art adopts the three-layer electroplating method on the surface of silver ornaments to electroplate it, so the electroplated silver ornaments have shortcomings such as low durability and easy oxidation.

Contents of the invention

The invention provides a bright five-layer electroplating process on the surface of silver ornaments, which solves the problems of low durability and easy oxidation of the silver ornaments caused by the three-layer electroplating method on the surface of silver ornaments in the prior art.

In order to solve the above problems, the present invention adopts the following technical scheme: a five-layer electroplating process for brightening the surface of silver jewelry, including the following five steps:

1. Treatment of silver jewelry before electroplating;

Two, to the electroplating of silver jewelry, comprise the following steps: (one) put into the dilute sulfuric acid that mass concentration is 35-45% the silver jewelry that cleans degreasing clean 28-32 second; The jewelry is placed in the electroplating tank for electroplating, the electroplating anode is 316 stainless steel, the silver content in the electroplating tank is a solution of 1-1.5 g/L, and the electroplating time is 0.5-1 minute; (3) Put the silver jewelry in step 2 into 3KBP Electroplating in a thick silver tank, the electroplating anode is an electrolytic plate with a silver content of 99.98-99.99%, the electroplating solution is a solution with a silver content of 30-35 grams per liter, and the temperature is 20-25°C;

3. Electroplating palladium on the silver jewelry, including the following steps: (1) cleaning the silver jewelry with pure water; It is a solution with a palladium content of 2-3 g/L, the electroplating time is 0.9-1.1 minutes, and the temperature is 40-45°C;

Four, electroplating platinum on the silver jewelry, comprising the following steps: (1) the silver jewelry after electroplating palladium is first cleaned with pure water, then put into mass concentration and be 35-45% dilute sulfuric acid to soak for 4-6 seconds, finally use Clean water again for 2-3 times; (2) Put the cleaned silver jewelry into a platinum tank for electroplating, the electroplating anode is a platinum titanium mesh, and the electroplating solution is a solution with a platinum content of 1-2 grams per liter, and the temperature is 45- 50°C;

5. Post-processing of electroplated silver jewelry.

The advantages of the present invention are: the five-layer thickened electroplating on the lower edge of the present invention is more durable than the three-layer electroplating, and is not easily oxidized.

Detailed ways

The present invention will be described in detail below with the best embodiment.

Embodiment one

The five-layer electroplating process for bright silver jewelry surface includes the following steps: 1. Treat the silver jewelry before electroplating; 2. Electroplating the silver jewelry; 3. Electroplating palladium on the silver jewelry; 4. Electroplating platinum on the silver jewelry; , Post-processing of electroplated silver jewelry.

The treatment of silver jewelry before electroplating includes the following steps: 1. In an ultrasonic cleaning tank, use a dewaxing aqueous solution heated to 90-100°C to dewax and clean the silver jewelry for 14-16 minutes; 2. Filter and clean with clean water; 3. 1. Put the silver jewelry into the electrolytic degreasing tank, and use the electrolytic solution for electrolytic degreasing for 1-3 minutes; 4. Repeat steps 1-3 until the silver jewelry is cleaned.

The electroplating of silver jewelry includes the following steps: 1. Soak the cleaned and degreasing silver jewelry in dilute sulfuric acid with a mass concentration of 35-45% for 28-32 seconds; 2. Put the soaked silver jewelry into the electroplating tank Medium electroplating, the electroplating anode is 316 stainless steel, the electroplating cylinder is a solution with a silver content of 1-1.5 g/L, and the electroplating time is 0.5-1 minute; 3. Put the silver jewelry in step 2 into a 3KBP thick silver cylinder for electroplating, The electroplating anode is an electrolytic plate with a silver content of 99.98-99.99%, the electroplating solution is a solution with a silver content of 30-35 grams per liter, and the temperature is 20-25°C.

Electroplating palladium on silver jewelry includes the following steps: 1. Clean the silver jewelry with pure water; 2. Hang the cleaned silver jewelry into a palladium electroplating cylinder for electroplating. The electroplating anode is platinum and titanium mesh, and the electroplating solution is palladium content 2- 3 g/L solution, the plating time is 0.9-1.1 minutes, and the temperature is 40-45°C.

Electroplating platinum on silver jewelry includes the following steps: 1. Clean the silver jewelry after electroplating palladium with pure water, then soak it in dilute sulfuric acid with a mass concentration of 35-45% for 4-6 seconds, and finally wash it again with clean water 2 -3 times; 2. Put the cleaned silver jewelry into a platinum cylinder for electroplating. The electroplating anode is a platinum titanium mesh. The electroplating solution is a solution with a platinum content of 1-2 grams per liter, and the temperature is 45-50°C.

Post-treatment of electroplated silver jewelry includes the following steps: 1. Clean the silver jewelry after electroplating with water; Soak in gold and silver anti-tarnish protection liquid for 0.9-1.1 minutes, and then wash with clean water; 4. Soak and clean with pure water at a temperature of 50-70°C, and then dry the silver jewelry with an air gun; 5. Use The oven heats the silver jewelry to 70-80°C and then dries it at a constant temperature.

Embodiment two

The five-layer electroplating process for bright silver jewelry surface includes the following steps: 1. Treat the silver jewelry before electroplating; 2. Electroplating the silver jewelry; 3. Electroplating palladium on the silver jewelry; 4. Electroplating platinum on the silver jewelry; , Post-processing of electroplated silver jewelry.

The treatment of silver jewelry before electroplating includes the following steps: 1. In an ultrasonic cleaning tank, use a dewaxing aqueous solution heated to 90-100°C to dewax and clean the silver jewelry for 15 minutes; 2. Filter and clean with clean water; 3. Put the silver jewelry into the electrolytic degreasing cylinder, and use the electrolytic solution for electrolytic degreasing for 2 minutes; 4. Repeat steps 1-3 until the silver jewelry is cleaned.

The electroplating of silver jewelry includes the following steps: 1. Soak the cleaned and degreasing silver jewelry in dilute sulfuric acid with a mass concentration of 35-45% for 30 seconds; 2. Put the soaked silver jewelry into an electroplating tank for electroplating , the electroplating anode is 316 stainless steel, the electroplating tank is a solution with a silver content of 1-1.5 g/L, and the electroplating time is 0.5-1 minute; 3. Put the silver jewelry in step 2 into a 3KBP thick silver tank for electroplating, and electroplate the anode It is an electrolytic plate with a silver content of 99.99%, the electroplating solution is a solution with a silver content of 30-35 g/liter, and the temperature is 20-25°C.

Electroplating palladium on silver jewelry includes the following steps: 1. Clean the silver jewelry with pure water; 2. Hang the cleaned silver jewelry into a palladium electroplating cylinder for electroplating. The electroplating anode is platinum and titanium mesh, and the electroplating solution is palladium content 2- 3 g/L solution, plating time is 1 minute, temperature is 40-45°C.

Electroplating platinum on silver jewelry includes the following steps: 1. Clean the silver jewelry after electroplating palladium with pure water, then put it into dilute sulfuric acid with a mass concentration of 35-45% to soak for 5 seconds, and finally use clean water to wash it twice; 2. Put the cleaned silver jewelry into a platinum cylinder for electroplating. The electroplating anode is a platinum titanium mesh. The electroplating solution is a solution with a platinum content of 1-2 grams per liter, and the temperature is 45-50°C.

Post-treatment of electroplated silver jewelry includes the following steps: 1. Clean the silver jewelry after electroplating with water; Soak in gold and silver anti-tarnish protection liquid for 1 minute, and then wash with clean water; 4. Soak and clean with pure water at a temperature of 50-70°C, and then dry the silver jewelry with an air gun; 5. Dry the silver jewelry with an oven. Silver jewelry is heated to 70-80°C and then dried at a constant temperature.

Prove through experiment after adopting technology electroplating of the present invention, can form following five layers of protective layers: make a bottom layer (alkali silver), bright layer (acid thick silver), sealing layer (nickel or palladium), surface layer (gold, silver, rhodium) etc.), sealing layer (electrolysis or electrophoresis or protective paint), so it is more durable and not easy to oxidize.

Finally, it should be noted that: obviously, the above-mentioned embodiments are only examples for clearly illustrating the present invention, rather than limiting the implementation. For those of ordinary skill in the art, other changes or changes in different forms can be made on the basis of the above description. It is not necessary and impossible to exhaustively list all the implementation manners here. However, the obvious changes or variations derived therefrom are still within the protection scope of the present invention.

Claims (3)

1. Silver Jewelry surface-brightening five layers of electroplating technology, is characterized in that, comprise following five steps:

One, Silver Jewelry before plating is processed;

Two, to the plating of Silver Jewelry, comprise the following steps: it is that the dilute sulphuric acid of 35-45% soaks 28-32 second that the clean Silver Jewelry of cleaning oil removing is put into mass concentration by (one); (2) Silver Jewelry after soaking is put into plating cylinder to electroplate, galvanic anode is 316 stainless steels, be silver content is the solution of 1-1.5 grams per liter in plating cylinder, and electroplating time is 0.5-1 minute; (3) Silver Jewelry of step 2 is put into the thick silver-colored cylinder of 3KBP to electroplate, galvanic anode is silver content is 99.98-99.99% electrolytic zinc-coated steel sheet, and electroplate liquid is the solution of silver content 30-35 grams per liter, and temperature is 20-25 DEG C;

Three, palladium plating on Silver Jewelry, comprises the following steps: Silver Jewelry pure water cleans by (one); (2) by cleaning after Silver Jewelry be linked into palladium plating cylinder in electroplate, galvanic anode is platinum titanium mesh, and electroplate liquid is the solution of palladium content 2-3 grams per liter, and electroplating time is 0.9-1.1 minute, and temperature is 40-45 DEG C;

Four, to power on lily gilding at Silver Jewelry, comprise the following steps: the Silver Jewelry after palladium plating first cleans with pure water by (one), then putting into mass concentration is that 35-45% dilute sulphuric acid soaks 4-6 second, finally adopts clear water to clean 2-3 time again; (2) Silver Jewelry after cleaning is put into platinum cylinder to electroplate, galvanic anode is platinum titanium mesh, and electroplate liquid is the solution of platinum content 1-2 grams per liter, and temperature is 45-50 DEG C;

Five, aftertreatment is carried out to electrosilvering ornaments.

2. Silver Jewelry surface-brightening five layers of electroplating technology as claimed in claim 1, it is characterized in that, carry out process to Silver Jewelry before plating to comprise the following steps: (one), in ultrasonic cleaning cylinder, adopts the Wax removal water solution being heated to 90-100 DEG C to carry out paraffin removal cleaning 14-16 minute to Silver Jewelry; (2) cleaning is filtered with clear water; (3) Silver Jewelry is put into electrolytic degreasing cylinder, carry out electrolytic degreasing 1-3 minute with electrolytic solution; (4) repeating step 1-3 is clean to Silver Jewelry process.

3. Silver Jewelry surface-brightening five layers of electroplating technology as claimed in claim 1, is characterized in that, carry out aftertreatment comprise the following steps electrosilvering ornaments: (one) is that Silver Jewelry after plating cleans with clear water; (2) be that Silver Jewelry carries out ultrasonic wave removal of impurities 0.5-1 minute with Wax removal water, then clean with clear water; (3) carry out immersion 0.9-1.1 point kind with gold and silver Anti-tarnishing protection liquid, adopt clear water to clean afterwards; (4) carry out soaking and washing with the pure water that temperature is 50-70 DEG C, with air pressure gun, Silver Jewelry is dried up afterwards; (5) constant temperature drying after Silver Jewelry being heated to 70-80 DEG C with baking box.