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Tin and its alloy is a kind of coating with good weldability and corrosion resistance. It is widely used in electronic components and printed circuit boards. In addition to the physical methods such as hot dipping and spraying, the methods such as electroplating, dip plating and chemical plating have been widely used in industry due to their simplicity.
Immersion tin plating
Dip plating is to dip the workpiece into the solution containing the metal salt to be plated, and deposit the metal coating on the surface of the workpiece according to the principle of chemical replacement. This is different from the general principle of electroless plating, because the solution does not contain reducing agent. It is also different from contact plating, which means that when the workpiece is immersed in the salt solution of the metal to be plated, it must be closely connected with a reactive metal, which is an anode entering the solution and releasing electrons. The metal ions with higher potential in the solution get electrons and deposit them on the surface of the workpiece. Dip tin is applied only to iron, copper, aluminum and their respective alloys.We use this method for coating the bending fabrication customized parts.
Electroless tin
No reducing agent used for copper or nickel autocatalytic deposition can be used to reduce tin. The simplest explanation is that the hydrogen evolution overpotential on the surface of tin is high, and the above reducing agent is hydrogen evolution reaction, so it is impossible to reduce tin ions to tin. In order to electroless tin plating, it is necessary to choose another kind of hydrogen-independent strong reductants, such as Ti3+, V2+, Cr2+, etc., only T3+/Ti4+ system has been reported.
Advantages:
1. Tin is reduced by divalence, saving electricity consumption;
2. Bath conductivity is high, bath voltage is low, high current efficiency;
3. Operate the equipment close to room temperature without heating;
4. Luster coating can be obtained by using appropriate additives;
5. Less damaging to the substrate.
Surface treatment: tinplating
Raw material: copper parts
Packaging Details: Cartons and bags(we offer customized package and custom sheet metal bending.)
As one of the most professional sheet metal components manufacturers in China, Shenzhen HSJ Metal Fabrication Co., Ltd. provides research and development, production of metal fabrication and different kinds of stamping parts,metal bending parts,precision machining parts,CNC machine lathe car spare parts, and other industrial parts. RFQ today!
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