What type of flux should be avoided in soldering electrical connections?

In soldering electrical connections, avoiding acid fluxes is crucial because they can cause corrosion and damage to the metal surfaces over time. Acid fluxes, such as rosin-based or other corrosive types, can leave behind residual acids that are detrimental to the long-term integrity of electrical connections. This residual acidity can accelerate oxidation and degradation of metal contacts, leading to failure or unreliable performance in electrical circuits.

Materials used in electrical applications should be clean and free from corrosion to ensure good conductivity and connection integrity. Therefore, using a non-corrosive, rosin-based, or neutral flux is preferred for soldering electrical connections, as these types are designed to provide clean joints without the adverse effects associated with acid fluxes.