Copper wire tinning is widely used in the production of wires, cables, and enameled wires. The tin coating is bright and silvery white, which can increase the weldability and decoration of copper without affecting electrical conductivity. It can be used in the electronics industry, furniture, food packaging, etc. Anti-oxidation, increase the beauty of copper workpieces. No need for electroplating equipment, only need to soak, convenient and simple, and can be plated with thick tin. [1]

Feature introduction
1. Tinned copper wire has excellent solderability.

2. As time changes, the solderability remains good and can be stored for a long time.

3. The surface is smooth, bright and moist.

4. Stable and reliable performance, ensuring high quality and high yield.

Physical and chemical indicators
1. Specific gravity: 1.04~1.05

2. PH: 1.0~1.2

3. Appearance: colorless transparent liquid

process flow
Degreasing of copper parts — pickling or polishing — two washings — electroless tin plating — three washings — dry in time with cold wind — testing.

Electroless tin plating: Add 8~10g/kg of tin plating additives to the tin plating water before use. The temperature of immersion tin is normal temperature~80℃, and the time of immersion tin is 15 minutes. During the process of tin plating, the plating solution should be gently stirred or the workpiece should be turned gently. . Repeated soaking can increase the thickness of the tin layer.

Precautions
The copper workpiece after micro-etching should be put into the tin plating solution in time after washing to prevent the copper surface from being oxidized again and affecting the quality of the coating.

When the tinning efficiency drops, 1.0% tinning additive can be added, and it can be used after stirring evenly.