Lead-free tin bar is an energy-saving raw material free of lead compounds, also known as a low-carbon and environmentally friendly Solder Bar, and has long passed SGS testing. It causes no air pollution. There are several main problems in its production process. Below, the Solder Paste Manufacturer explains:

1. Incomplete lead-free soldering. The root cause is not only an over-active Flux but can also be triggered by the material properties of the products being soldered. The essential cause must therefore be identified, considering not only the company's own products but also whether other factors are at play.

2. Non-uniform appearance on the product surface during lead-free tin bar soldering. It is mainly caused by the following factors:

a. Environmental contamination around the soldering area and an unclean surface before soldering can cause an uneven soldered surface.

b. Soldering-time mismatch and oxidation during the lead-free soldering process can lead to uneven solder appearance.

3. Solder defects may appear after lead-free tin bar soldering, mainly due to improper flux use. To address this, keep the soldering environment dry and ensure the preheating temperature matches the actual process conditions. Only in this way can such defects be greatly reduced.

4. Since lead-free tin bars emerged, many people have not encountered certain soldering phenomena. Such problems with the flux are caused by insufficient flux activity, meaning the flux has never been able to play its proper role.

During soldering, there are many lead-free issues, large and small. The above are the more common ones. If you encounter others, please feel free to call our engineers at any time to help you solve soldering problems and achieve higher efficiency.