Anodizing

An electrochemical process used to grow a thick, protective oxide layer on metals such as aluminum. The resulting anodic coating protects against corrosion and increases wear resistance.

When anodizing, the aluminum is connected as the anode and forms a hard, protective oxide layer in the electrolyte bath. The layer is wear-resistant but electrically insulating and must be completely removed before welding – otherwise you won't get a clean root and there will be lack of fusion. If the oxide layer is damaged, corrosion quickly sets in at that spot. For the workshop, this means: before welding, grind the anodized surface mechanically until bare or strip it chemically, and store the parts dry and clean.

MetallurgieSchweißtechnik