PICKLING AND ACID DIPPING

摘要

Acid treatment identifies a process whereby the base metal is subjected to mild, moderate, or aggressive etching. It's reasonable to assume the solution pH is below 2.0. What happens chemically can be illustratjed by the reaction between metal, oxide, and acid: Metal Oxide+Acid=Metal Sak+Water Metal+Acid=Metal Salt+Hydrogen (proton) Hydrogen (proton)+Hydrogen (proton)=Hydrogen (gas).