Al-Zn-Mg-Cu alloy - 7075 alloy: 5.5-5.8% Zn, 2.1-2.6% Mg, 1.6-1.7% Cu

Al-Zn-Mg-Cu alloy - 7075 alloy: 5.5-5.8% Zn, 2.1-2.6% Mg, 1.6-1.7% Cu

Material Name: Al-Zn-Mg-Cu alloy
Recipe No.: 3361
Primary Chemical Element in Material: Al
Sample Type: Bulk
Uses: Electrolytic thinning
Etchant Name: None
Type (Macro/Micro): Micro
Etching Method: Chemical etching and electrolytic etching
Etchant (Electrolyte) Composition: For cast alloy: a.) electrolytic etch in 2% hydrofluoric acid. b.) chemical etch in 0.5% hydrofluoric acid.
Procedure (Condition): Etch for fully heat treated alloy: 25% nitric acid at 70 C.
Note: 7075 alloy: 5.5-5.8% Zn, 2.1-2.6% Mg, 1.6-1.7% Cu.
Reference: E.D.Russo, et al., Met.Trans., Vol.4, No.4, April 1973, p. 1133.