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.
Related Content
-
Understanding and Managing White Spots on Anodized Aluminum
Having trouble with spotting defects when anodizing? Taj Patel of Techevon LLC offers a helpful overview of the various causes of white spots and potential solutions.
-
Trivalent Chrome Overview
As the finishing industry begins to move away from the use of hexavalent chromium to trivalent chromium, what factors should finishers consider as they make new investments? Mark Schario, chief technology officer for Columbia Chemical offers a helpful overview of this complicated topic.
-
Products Finishing Reveals 2024 Qualifying Top Shops
PF reveals the qualifying shops in its annual Top Shops Benchmarking Survey — a program designed to offer shops insights into their overall performance in the industry.
