Electroplating equipment Electroplating, also known as electrodeposition, is one of the main methods to obtain metal coatings on the surface of materials. It is the process of making the metal ions in the solution deposit on the surface of the cathode plated parts under the action of the DC electric field and forming a circuit by the anode and cathode in the electrolyte solution (plating solution); Current efficiency: the ratio of the electricity used to deposit metal to the total electricity is called current efficiency of electroplating.
(1) Surface treatment solution: in order to improve the bonding strength between the coating and the substrate, the plated surface must be strictly pretreated in advance, including electrocleaning treatment and activation treatment, so there are electrocleaning solution and activation solution.
Electrocleaning solution: It is called electrocleaning treatment to remove the oil stain and impurities on the metal surface of parts by electrolysis. The electrocleaning solution is colorless and transparent alkaline solution. It does not freeze at - 10 ℃ and can be stored for a long time with low corrosivity. Rinse the parts with clean water after electrocleaning.
Activation solution: removing the oxide film on the metal surface of parts by electrolysis is called activation treatment, Manufacturer of electroplating wastewater treatment equipment The purpose is to expose metallic luster on the surface of parts and create conditions for the combination of coating and base metal.
(2) Deposition metal solution: brush plating solutions are generally divided into acidic and alkaline. The deposition rate of acid solution is 1.5~3 times faster than that of alkaline solution, but most acid solutions are not suitable for loose metal materials, such as cast iron, nor for metal materials that are not resistant to acid corrosion, such as tin, zinc, etc. Alkaline and neutral electroplating solutions have good service performance, can obtain coatings with fine grains, have good plating ability at corners, slits, blind holes, etc., and are non corrosive, suitable for plating on parts of various materials.
(3) Plating equipment stripping solution: used to remove the coating on the surface that does not need to be plated, mainly removing chromium, copper, iron, cobalt, nickel, zinc and other coatings.
1. The last method of brush plating is called "brush plating": it is an electrodeposition technology, and not all parts are immersed in the electrolyte during the electroplating process. Electroplating equipment In this electroplating technology, only a limited area is electroplated, and there is no impact on the rest..
2. Finger plating equipment often needs to plate rare metals on board edge connectors, board edge protruding contacts or gold fingers to provide lower contact resistance and higher wear resistance in electroplating. This technology is called finger plating or protruding part electroplating. In electroplating, gold is also often plated on the protruding contact of the board edge connector whose inner layer is nickel. The protruding part of the gold finger or the board edge is manually or automatically plated. At present, the gold plating on the contact plug or gold finger has been replaced by lead plating and button plating.
3. The pins and pins of roller linked selective plating electronic components, such as connectors, integrated circuits, transistors and flexible printed circuits, are all selectively plated to obtain good contact resistance and corrosion resistance. This electroplating method can use either manual electroplating production line or automatic electroplating equipment. It is very expensive to select and plate each contact pin separately, so it must be welded in batches. In electroplating production, the two ends of the rolled metal foil with the required thickness are usually punched, cleaned by chemical or mechanical methods, and then selectively used such as nickel, gold, silver, rhodium Button or tin nickel alloy, copper nickel alloy, nickel lead alloy, etc.
