There is no exact and complete definition of high-speed electroplating. It can be understood that high-speed electroplating is an electroplating method that uses a special device to obtain a good coating (related instrument: coating Thickness Gauge) even when using a very high cathode current density. Most of the process is carried out in a special sealing device.
In the early 1940s, continuous high-speed tinning of steel strips was applied on an industrial scale. At that time, the cathode current density used was 28A/d㎡-46A/d㎡, and a 0.75μm (thick tin layer) could be continuously plated on the steel strip in 2s-3s. The steel strip moving at a speed greater than 1.2m/s is The key to obtaining this high-speed tin plating is also an important part of the subsequent high-speed plating of other plating types on strip or wire .
From the 1940s to the 1970s, a lot of research has been done on ways to achieve high-speed electroplating, including high-speed liquid flow, high-frequency pulses, ultrasonic stirring, mechanical stirring with abrasive solutions, jetting, etc. Among these methods, the high-speed liquid flow method is widely used, and the ion is transferred to the surface of the cathode by a forced method, which is the technical basis for greatly increasing the cathode current density; in addition, with the development of related technology industries, such as Effective and durable raw materials, the emergence of plating solution additives, the evolution of masking materials, the upgrading of computer control technology, etc., the current high-speed electroplating (including selective high-speed plating) process and equipment have reached a stage of perfection.
Since high-speed electroplating greatly improves the plating speed, the production efficiency is greatly improved, which provides favorable conditions for mass continuous production. Due to the fast deposition speed, the production line that originally required several plating tanks now only needs one or two plating tanks, thus reducing the floor space and simplifying the production process of the automatic line. The simplification of these equipments can compensate for some high-speed electroplating equipment. expenditure.
It is relatively easy to realize the automatic operation and quality control of high-speed electroplating by electronic computer, and the low cost also improves the reliability of the product. At present, high-speed plating processes and devices ranging from coil-to-coil continuous plating of small and medium-sized electronic products to continuous tinning, zinc and zinc alloy plating of large steel strips are all automatically controlled by computers.
Because most of the high-speed electroplating is carried out in a closed system, the plating solution is recycled, and the exhaust gas is taken away from the operating area and then treated and recycled in a unified manner, thereby saving energy and is conducive to environmental protection; moreover, since most plating solutions use single-salt plating solution , and its wastewater treatment is also simple.
The various advantages of high-speed electroplating lead to its increasingly wide application in steel, machinery, electronics and other industries. Typical ones are: continuous high-speed tinning of thin steel strips as canning materials (related instruments: tinplate); continuous high-speed galvanizing and zinc alloys as automotive materials; preformed parts (IC frames, connectors, resistance-capacitance components , semiconductor two, triode, etc.) strip overall plating or partial selective plating, providing a reliable and cheap basis for mass production of electronic components.
With the development of high technology and the demand of the market, it is believed that the development of high-speed electroplating has greater significance than any other electroplating. Because it provides entrepreneurs with the opportunity to save energy consumption, benefit the environment and reduce the overall cost of manufacturing various products.
