Salts Build-up Around The Top of The Cathodes
The aluminum cathode bars in our Type II anodizing tank have become completely encrusted with white “salts” at the solution/air interface.
Q. The aluminum cathode bars in our Type II anodizing tank have become completely encrusted with white “salts” at the solution/air interface. I would normally think that this was a build-up of aluminum sulfate, but I thought this only happened when the concentration of dissolved aluminum in the bath was higher than normal. The aluminum in this bath is less than 2 g/L. What do you think is going on? J.M.
This important first step can help prepare the metal for subsequent surface finishing.
Electropolishing can be a pretreatment for anodizing or a substitute for bright dipping. Either way, it improves the surface of the aluminum...
Anodizing for pre-prep bonding bridges the gap between the metallic and composite worlds, as it provides a superior surface in many applications on aluminum components for bonding to these composites.