Why We Use Alternating Current for Aluminum

Aluminum is covered by an oxide layer; this layer has drawbacks about which welders needs to know about. Alternating current (AC) solves these problems by destroying or eliminating the oxide layer.

With AC welding the welder can set different current flows. Each wave form has its weaknesses and strengths. Before the welder starts to work on an aluminum application he must also think about cap-shaping—the electrode must have a rounded end when alternating current is used.

A number of aspects have to be considered when using TIG for welding aluminum. The new blog article “What Actually Is … Aluminum Welding with Alternating Current (AC)?” explains these special features and their background.