Proper Tinning and Caring of Soldering Iron Tip

Soldering production can be enhanced and joint failure due to soldering can be greatly

reduced by taking proper care of the soldering tip. These tips are made of copper plated with

iron and the right tinning while working will ensure maximum value for the tip.

Soldering iron tip sold by prominent manufacturers are usually tinned and ready to be used

immediately. The iron plated tips help reduce oxidation of the iron on the working surface.

When the protective layer on the tip is lost with usage, it leads to tip failure. Working surface

of the tip becomes oxidized and such tips are called de-tinned tips. Such tips cannot transfer

heat to the metals as they cannot accept solder efficiently.

De-tinning can occur due to various reasons –

If the solder wire is very small with a minimum diameter, the tip cannot remain tinned

as it is difficult to maintain the flux

Oxidation is speeded up by maintaining high temperatures. It is recommended to

maintain a temperature of 800°F (427°C) or less for best results

During idling periods, if the soldering iron tip is left uncovered, it may lead to de-

tinning. It is advisable keeping the tip covered with solder

Using wick or repairing the tip can also lead to de-tinning

Similarly, solder that contains less tin content also de-tins fast

Solder must be wiped only with a wet cellulose sponge. Wiping it with metal wool,

paper towels, rags, man-made sponges or dry sponges will lead to de-tinning

Using low-residue or unclean fluxes leads to lack of flux during the soldering

operation

Solder must not be added to the soldering tip directly. Metals to be joined must also not be

rubbed with the tip by operators. They must ideally feed the solder to the joint during the

soldering operation.

Following these few tips will ensure that the performance of the soldering iron tip is

maintained –

The working end of soldering tip must be enhanced with rosin core solder of the right

diameter, usually 80mm or larger.

Wiping the tip after use must be done with wet pure cellulose, sulphur-free sponges

Keeping the operating temperature lower than 800°F (427°C will ensure that there is

minimal iron oxide formation, one of the major causes of de-tinning

Soldering iron tip can be restored using polishing bars. These polyurethane foam bars come

with abrasives embedded in them. The bars will help remove the surface oxides leaving it

clean to be re-tinned with rosin core solder.

Today, lead-free solders are available in the market making soldering tip maintenance

absolutely imperative. If the solders contain high tin content and the operator uses very high

temperatures, tips become corrosive and become susceptible to damage leading to shorter tip

life. Soldering iron tip life can be greatly enhanced and money can be saved by adopting the

best maintenance and care procedures. Buying pre-tinned, lead-free soldering tips is the first

step towards ensuring value for money and smooth performance.