ACID ETCHING METHOD, ACID ETCHING TREATMENT DEVICE AND METHOD FOR PRODUCING ALUMINUM-BASED MEMBER

摘要

PROBLEM TO BE SOLVED: To provide a method which continuously performs acid etching at a high etching rate without exchanging a treatment liquid.;SOLUTION: Disclosed is a method for etching the surface of an aluminum-based member obtained by casting and/or forging an aluminum-based material with a surface treatment liquid of pH ≤3 comprising inorganic acid, and includes feeding steps 2, 11 feeding F ions and alkali metal ions into the surface treatment liquid.;COPYRIGHT: (C)2010,JPO&INPIT