1999HB/Z 339.1-1999 Analytical method of chromic acid anodic oxidation solution of aluminum alloy Determination of free chromium trioxide and total chromium trioxide content by potentiometric titration
1979HB/Z 5104-1978 Analysis method of aluminum alloy anodic oxidation solution
HB/Z 5104-1978 Analysis method of aluminum alloy anodic oxidation solution was changed to HB/Z 339.1-1999 Analytical method of chromic acid anodic oxidation solution of aluminum alloy Determination of free chromium trioxide and total chromium trioxide content by potentiometric titration.