What is the purpose of setting the AC balance to "clean" in cathodic cleaning?

The purpose of setting the AC balance to "clean" in cathodic cleaning is to enhance the cleaning action. In the context of GTAW (Gas Tungsten Arc Welding) when operating on aluminum or magnesium, the AC balance controlling the proportion of positive and negative cycles in the alternating current influences the welding arc and the surface cleaning. A setting towards the "clean" side increases the positive polarity time, which aids in removing oxide layers and impurities from the surface of the metal being welded. This enhanced cleaning is particularly critical when preparing surfaces for welding, ensuring a better bond and improving the overall quality of the weld. By promoting effective cleaning, you are not only optimizing the welding process but also contributing to the integrity and strength of the final weld.