Water-soluble cationic polymer “PAS seires” have been exclusively used as a metal-surface-leveling agent among the metal processing companies due to the high affinity with metal-plated substrates.
 Acid wash inhibitors
PAS series show an excellent effect as an acid corrosion inhibitor at the process to remove the rust and others in an acid bath (using hydrochloric acid, sulfuric acid, etc), called a pickling.
 Cleaning inhibitors
Used PAS in acid cleaning (hydrochloric or sulfuric acid) for piping equipments, it can control excessive corrosion.
PAA and PAS have been used as an additive agent for metal cutting oils (acid type) so many years.