What is the function of rosin flux in soldering?

Rosin flux plays a crucial role in the soldering process by preventing oxidation at the surfaces of the metals being joined. When metals are heated during soldering, they tend to oxidize, which can hinder the effectiveness of the solder joint. The primary function of rosin flux is to create a protective barrier that displaces moisture and contaminants, allowing for a clean and effective connection between the metals. The rosin component aids in the flow of solder and helps it adhere better to the surfaces, ensuring a strong and reliable joint. This is vital for achieving a high-quality soldering result in various electrical and mechanical applications.