Electroplating equipment What are the necessary auxiliary equipment

In order to complete the electroplating process according to the process requirements, it is not enough to have power supply and plating tank, but also some auxiliary equipment to ensure the normal production of electroplating. It includes heating or cooling equipment, cathode moving or stirring equipment, plating solution circulation or filtering equipment, and the necessary accessories of the plating tank, such as electrode rods, electrode wires, anodes and anode baskets, electroplating hangers, etc.

1. Heating or cooling device

Since the plating solution needs to work at a certain temperature, the plating tank should be equipped with heating equipment. For example, bright nickel plating requires the bath temperature to be kept at 50 ℃, chromium plating requires 50~60 ℃, and acid bright copper or silver plating requires the temperature to be within 30 ℃. In this way, these process requirements need to be met by heat exchange equipment. Direct heating is usually used for heating.

2. Cathode moving or stirring device

Some plating seeds or most plating seeds need the cathode to be in the swing state, which can increase the working current, make the plating solution play its due role (usually brightness and dispersion ability), and prevent the tip, corner plating and scorching.

Some plating seeds can use mechanical or air agitation instead of cathode movement. Mechanical mixing is carried out by a mixer made of corrosion-resistant materials, usually driven by a motor, but the speed cannot be too high. For air agitation, compressed air filtered to remove oil stain is selected.

3. Filtering and circulating filtering equipment

In order to ensure the electroplating quality, the plating solution needs to be filtered regularly. Some plating seeds are also required to be circularly filtered during operation. The filter is a common equipment in the chemical industry, so it is an industry standard equipment. However, it is also based on the enterprise's own standards. The filter can be selected according to the plating type, bath size and process needs.

4. Necessary accessories for electroplating tank

The electroplating tank must be equipped with accessories including anode and anode basket or anode hook, electrode rod, power connection wire, etc. In order to save investment, some enterprises can hang the anode directly to the plating tank with a hook instead of an anode basket, but at least the anode sleeve should be put on.

Most anode baskets are made of titanium materials, and a few plating seeds can also be made of stainless steel or steel.

The electrode rod is a conductive rod used to hang the anode and cathode and connect with the power supply. It is usually made of copper rod or brass rod, slightly longer than the plating bath. The diameter depends on the current, but it should be at least 5cm.

The key to the power cable is to ensure that it can pass the required current. It is better to use copper plate or multi strand cable, which must meet the requirements for its cross-sectional area.

5. Hanger

Hanger is the most important auxiliary tool for electroplating processing. It is a tool to ensure a good connection between the electroplated products and the cathode, and it also has a direct impact on the distribution of electroplated coatings and work efficiency. There are professional hanger manufacturers and suppliers that provide common hangers in the industry and design and customize hangers according to user needs.

6. Pre plating cleaning equipment

Application of ultrasonic cleaning in electroplating process

The pretreatment process of product electroplating is very important. Usually, the traditional process uses acid solution to treat the workpiece, which causes heavy environmental pollution and poor working environment. At the same time, the biggest disadvantage is that the residual acid after pickling and derusting of parts with complex structure is difficult to clean. After the workpiece is plated for a short time, corrosion occurs along the seam, which damages the surface of the electroplated coating and seriously affects the appearance and internal quality of the product. After the ultrasonic cleaning technology is applied to the pretreatment of electroplating, not only can the dirt in the surface and gap of objects peel off quickly, but also the electroplating layer of electroplated parts is firm and will not rust back.

The cavitation effect of ultrasonic wave in the liquid can be used to clean the oil stain on the surface of the workpiece. With proper cleaning agent, the workpiece surface can be quickly treated with high cleanliness.

Electroplating process requires high cleanliness of workpiece surface, and ultrasonic cleaning technology is an ideal technology to meet this requirement. Using ultrasonic cleaning technology can replace solvent to clean oil stains; It can replace electrolytic degreasing; It can replace strong acid etching to remove rust and oxide scale on the surface of carbon steel and low alloy steel.