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Tip Life
Why are soldering tips worn out?
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Tip Life TOP
Point 1 Solder corrodes the iron-plated part and makes a hole.
Point 2 The solder-plated part is oxidized in black and the tip is no longer wet with solder.
Point 3 The surface of the heating element insertion part oxidizes and the heat conduction becomes poor.
(*Except for tips in composite type which has different structure)

Point 2. The solder-plated part is oxidized in black and the tip is no longer wet with solder.

The iron plating beneath the solder-plated part becomes exposed, and the area becomes black as oxidization starts. This is especially common when using lead-free solder, or the soldering iron is used without applying solder in the rework for solder bridge or other process.
The solder-plated part is oxidized in black and the tip is no longer wet with solder.
If the tip oxidizes.
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