Soldering iron head oxidation does not eat tin causes and solutions
In the use of soldering iron for welding work, often encounter the soldering iron head oxidation does not eat tin problem, caused by the soldering iron head does not eat tin for a variety of reasons, but as long as you know is to sum up the experience, the common soldering iron head does not eat tin reason or will find, in addition to the soldering iron head does not eat tin treatment method, is also to master.
1, the soldering iron head oxidation does not eat tin reason
In the process of using the soldering iron, the most afraid of encountering is the soldering iron head burned to death, when encountered this situation how to deal with, the following share so many years to sum up the method.
In order to prevent the soldering iron head burned to death without eating tin, first of all, we need to know the reason why the soldering iron does not eat tin. The main reason why the soldering iron head does not eat tin is due to the soldering iron head for a long time caused by burning, this is the beginning of electronic soldering technology friends are most likely to make a mistake, often forget to unplug the power supply when dealing with other things, so that the soldering iron head in the burning, burning the iron head when the temperature is very high, about 380 degrees.
Divided into two cases, see the soldering iron head is copper metal, or iron metal, the consequences are different.
(1) The soldering iron tip is a copper metal.
It will have a chemical reaction with the oxygen in the air, will generate black copper oxide on the surface, if melted solder will have tin ball liquid in the old iron head surface, oxidation is serious, it will not stick to the tin, which is called "soldering iron head does not eat tin".
(2) The iron head of the soldering iron is ferrous metal.
As a result of prolonged air burning, it will become black iron oxide, this metal is also very difficult to eat tin.
2, the soldering iron head does not eat tin processing method
Usually use the soldering iron head with copper, there are alloy made of soldering iron head, this iron head is mainly copper, iron, nickel, chromium, tin five kinds of metal synthesis.
For copper soldering iron, when it oxidises, because copper is relatively soft you can use sandpaper to polish the surface of the soldering iron head, when there is a bright copper metal power until just a little hot, and then the soldering iron head dipped in some rosin, and so on, until the soldering iron head to reach the temperature of the soldering iron head, and then finally to the soldering iron head to eat some tin, so that it can be used. In the use of copper soldering iron head will also find that this iron head will be corroded due to heat caused by the centre of the iron head has a groove, which is the result of thermal corrosion, need to file the horseshoe-shaped soldering iron head to repair, and then sandpaper polishing can be.
For the soldering iron head made of copper alloy, when the oxidation degree is not high, you can also use sandpaper to polish the surface of the soldering iron head, and then heated to dip a little rosin on the tin can be. In use will be found, if the iron head of the long time, the temperature is very high, when the temperature reaches 470 degrees, the iron head oxidation will be intensified, resulting in a very thick layer of oxidation, this time with sandpaper will not help, you must use a small file on the iron head sanding to be able to do.
In addition, for the iron and nickel alloy made of long life type soldering iron head, can not use sandpaper or file to clean up its surface, here should be in the case of heating, with a special tin cloth or wet cloth to scrub. You can use a magnet to judge the use of the iron head is not a long life iron head, as long as the iron head on the surface of the magnet, if the two have suction magnetism is a long-life type of iron head, if not, that is the ordinary type of iron head.
In extreme cases, the whole iron tip will be oxidised, with sandpaper and file can not make the iron tip to eat tin, in this case we have to consider replacing the iron tip, there is no salvage measures available.
