Anodizing of aluminum: Acidic process monitoring

Anodizing is widely used for protecting aluminum via an oxidic protection layer against corrosion. The bath where the anodizing is carried out contains mainly sulfuric acid, aluminum-sulfate and water. To ensure a constant composition of the bath, customer-specific acid and salt concentration is continuously monitored and thereby a constant high quality of the protective film is guaranteed.

Download this application to understand how  Anton Paar’s  L-Com 5500 combines density and sound velocity measurement in one instrument to measure the concentration of acid salts.