Soldering Tip Knowledge Lecture 1.
Composition of soldering tip
Base material: red copper Plating: iron Tip (work surface): solder Other surface: nickel plating, chromium plating.
Soldering tip life
The life is different from model to model, generally speaking, the usage life can be 6 to 10 days, or 30,000 to 100,000 solder joints. 3.
The factors that influence soldering tip life
Since the corrosion resistance of copper is not good, it’s necessary to plate iron on the copper surface. Factors Solder wire
Solder flux contents:
Meta-acid or alkaline solder makes corrosion
The thicker iron plating layer, the longer usage life. The higher density of iron plating molecule, the longer corrosion resistance period.
Lower temperature ￫ longer usage life
Higher temperature ￫ shorter usage life
Clean with solder sponge ￫ longer usage life
steel wire tip cleaner
Clean with steel wire ￫ shorter usage life
Most cared problem
Usage life; 2. Wettability
5. Reasons of not wettable Phenomenon
Solder wire contents and solder flux will
Heat the soldering tip to 350°C,
generate oily matter and smoke, the oily
deposit or spot on
matter becomes carbon deposit after burned,
objectives be fumed will also generate carbon deposit
clean the tip with solder sponge or steel wire tip cleaner until it becomes white and shiny, then tin the tin with fresh solder.
1. Due to high temperature of the tip end, the tin has already been oxidized; the soldering High temperature
tip is oxidized, too.
2. Since the tip end lost protection of tin, the tip end turns cyan, even purple or red in high
1. Solve the problem with above solution. 2. Probably can’t be fixed.
temperature status. Oxidation rust
Without the protection of solder layer, the tip surface has turned black or been rusted.
Fix with the above solutions
Keep some solder on the tip surface when it is not in work status; tin the tip with fresh solder and then put it on iron holder.
When the soldering iron is not in work status, turn off the power or turn on sleep function, don’t be idle in high temperature.
The Thermal Theory of Heating Element 1. External thermal heating element: soldering tip inside, heating element outside. 2. Internal thermal heating element: soldering tip outside, heating element inside. 3. Heating element types: a. external thermal heating element; b. ceramic heating element; c. integrated heating element;
d. silver alloy heating element; e. high frequency heating element