Influence of acid on localized corrosion of aluminum alloys

1. 1) SWAAT(Sea Water Acetic Acid Test, ASTM G85 A3)(ASTM D1141) 10 mL/L pH2.8-3.0 (49C30 min)(49C98%RH 90 min)CASS(Copper Accelerated Acetic Acid Salt SprayJIS H 8681)5%NaCl-100 ppm Cu 2+ 1 mL/L pH3 50CAASST (Acetic Acid Salt Spray TestASTM G85-A1)5%NaCl pH3.1-3.3 35C ISO 3079 (Two-electrode method using acetic acid to measure pitting potential of aluminium and aluminium alloys in chloride solutions)5%NaCl 1 mL/L () 2) (Cl ) -pH (-pH) 3) (Al 3+ ) (Al 2 O 3 ) pH 4.893) (a Al3+ 10 6 M25C)