Tin metal composition and flux at high temperature, it will produce a kind of oily substances and smoke, dry up oily substances are formed after the carbon deposition; After the smoke smoked form carbon deposition. Generally not on tin, tin is melted into a ball rolled directly.

The solution

Black layer, not melt tin, tin or melting is a ball with blades shave head, making it bared copper parts, blowing faster, don't use too vigorously, finished with solder wire melting immediately above or reduced the welding head to 350 degrees, use a sponge or wire ball after clean carbon besmirch to shine, in its place with tin silk lip dip (tin).

The oxidation of the welding head into the container filled with alcohol, after 1 ~ 2 min, oxide has been completely removed.

But for a long time so welding head get shorter service life, long time not to use (more than 20 minutes) to turn off the power supply prolongs the service life of welding head.

Electroplating polishing soldering iron head punch phenomenon on the market, BEE, beautiful welding head adopts the whole piece of alloy materials, can't punch any grinding, practicality is very high.

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