What is the purpose of using rosin paste?

Rosin paste is specifically used as a non-corrosive flux in soldering applications. Its primary purpose is to facilitate the soldering process by cleaning the surfaces of metals and preventing oxidation, which can hinder the solder's ability to bond effectively. When heated, rosin paste helps to lower the surface tension of the solder, allowing it to flow more easily into joints or gaps between metals. This ensures a strong and reliable electrical connection or mechanical joint.

In addition to its functionality, one of the key benefits of using rosin paste as a flux is that it is non-corrosive once it solidifies, which means it does not damage the materials being joined and does not promote corrosion over time. This characteristic makes it ideal for use in electronic applications and areas where long-term reliability is critical. The properties of rosin paste set it apart from other types of flux that may be corrosive and require additional cleaning after the soldering process is completed.