What are the reasons why the solder wire does not stick to tin during welding?
The non-sticking tin of the welding wire during the welding process is a common situation in manual welding. There are three main reasons for the non-sticking tin of the welding wire. The paste manufacturer will summarize for everyone:
1. The correct soldering iron tip is not selected
The soldering iron tips used for soldering lead-free solder wire and soldering lead solder wire are also different. The corresponding soldering iron tip should be selected and cannot be mixed.
2. Aging of soldering iron tip
Most of the soldering iron tip is used under the condition of high temperature for a long time, the service life is relatively low, and it is easy to be damaged. It needs to be checked and replaced in time.
3. The quality of the soldering iron tip
It is recommended to choose a branded soldering iron tip, which has more advantages in terms of quality.
The reason for improper operation process
1. The tip of the soldering iron is not cleaned before use
There is an oxide layer on the tip of the soldering iron from previous soldering residues, resulting in non-stick tin. If the soldering iron tip has been oxidized and blackened, it is necessary to polish the soldering iron tip with a file or sandpaper, and polish off the black oxide layer on the surface of the soldering iron tip before soldering. You can also immerse the tip of the soldering iron in a 90% alcohol solution for 1 to 2 minutes to relieve oxidation.
2. The temperature of the soldering iron tip is set too high
If the temperature exceeds 430°C when the solder wire is soldered, it is easy to cause severe oxidation on the tin-dipped surface of the soldering iron tip, which will cause the tin-dipped surface to not stick to tin.
3. Before using the manual soldering iron to solder, the soldering iron tip does not eat the tinned surface.
When soldering, the soldering iron tip is not coated with a layer of tin first, which will cause the soldering iron tip to oxidize with the air at high temperature, showing an oxide layer, resulting in non-stick tin.
4. The power is not turned off when there is no work for a long time
When the operating temperature is higher than 350°C, and the soldering is stopped for a long time to achieve "dry burning", it will cause rapid oxidation and damage to the soldering iron tip.
1. Correct selection of solder wire and improper handling
There are also many kinds of solder wire, such as lead-free solder wire, lead solder wire, rosin solder wire, rosin-free solid core solder wire, etc. Different solder wires require different welding conditions. Notice.
2. The quality of solder wire is too poor
The quality of the welding wire is also the most important. You can't buy cheap products produced by small workshops without qualifications. Poor quality welding wire may have a lot of impurities, which will affect welding. Only by choosing a good solder wire can a good solder joint be produced.、
