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the failure of its heat transfer.
The reasons for the "non-wetting" soldering bit are as follows:
1
）
The soldering bit is not coated with new soldering tin before the soldering iron will be out of use for a long
time;
2
）
The soldering bit is used at a high temperature;
3
）
It is not fully melted during soldering;
4
）
The soldering bit is wiped with a dry or dirty sponge or cloth. It is required to use clean and wet industrial
grade sulfur-free sponge or brass wool for cleaning.
5
）
The solder or the iron coating is not pure, or the soldered surface is not clean.
C
）
Recover a non-wetting soldering bit
1
）
Remove the soldering bit from the soldering iron handle after the bit is cooled down.
2
）
Remove dirt and oxides on the tin coating of the soldering bit with 80# polyurethane abrasive foam or 100#
emery paper.
3
）
Put the soldering bit into the handle, use the tin wire containing rosin
（Φ
0.8 mm or above
）
to wrap new
exposed surface of the bit and turn on the power switch of the soldering station.
Caution:
Proper daily maintenance will effectively prevent the soldering bit from non-wetting.
D
）
Extend the life of the soldering bit
1
）
Coat new soldering tin after each use, so as to prevent the oxidation of the soldering bit and extend its service
life.
2
）
Use a temperature as low as possible during working, because a low temperature can reduce the oxidation of
the soldering bit and make soldering of components easier.
3
）
Use a thin soldering bit only when necessary, as the tin coating of a thin bit is less durable that a thick bit.
4
）
Do not use the soldering bit as a detection tool, because the bit will crack once bent and its service life will be
shortened in this case.
5
）
Use the flux with less activated rosin, as too much activated rosin will accelerate the corrosion of the tin
coating on the soldering bit.
6
）
When not in use, turn off the power supply to extend the service life of the soldering iron.
7
）
Do not apply a high pressure to the soldering bit because a high pressure does not mean a fast heat transfer.
To improve the heat transfer, it is required to melt the soldering tin to form a solder bridge for heat transfer
between the soldering bit and the welding spot.
