You can try with:

50ml Poulton reagent + 25ml HNO3 +1ml HF+1ml H2O.

(Poulton reagent : 12mlHCl concentrated+6mlHNO3+1ml HF(48%)+1mlH2O).

time 5 s

Yogesh, some times keller´s is not effective showing grain boundaries, but you could try with Weck´s or Barker´s.

Modified poultons is best.

Thanks to all.....50% HF had given required results, with proper method.

Yogesh Krushna Dhage

Hii Yogesh, Can you please explain the procedure with 50% HF? I am struggling to get microstructure of 6061 alloy

CAN YOU PLEASE TELL THE EXACT COMPOSITION OF MODIFIED POULTONS REAGENT USED FOR ETCHING OF GRAIN BOUNDARIES IN ALUMINIUM ALLOY 6061

Palukuri Nageswararao Rao

Palukuri Nageswararao Rao Can you please mention "Modified Poulton's" contents?

COULD YOU PLEASE SHARE WITH US THE DETAILS OF 0.5% HF ETCHENT, i HAVE A DIFFICULT TIME WITH ETCHING 5083-T ALLOY

use Tucker's reagent etchant for aluminum 6082 : 25 ml of water, 15 ml HF, 25 ml HCl, 15 ml HNO3.

immerse or swabs of your specimen for 5 second.