I am looking for a suitable etchant for Friction stir welded AL-6082 alloy. Please help me regarding this.
You can try with electro-polishing in 10% perchloric acid in ethanol, followed by anodisation, using Bakers reagent (5% HBF4 inpure water) at 30 V for about 1 min.
You can try electrolytic corrosion(perchloric acid and anhydrous ethanol)
Kroll's reagent (92 mL H2O, 6.0 mL HNO3, 2.0 mL HF)
and
Keller's etchant (95 mL H2O, 2.5 mL HNO3, 1.5 mL HCl, 1.0 mL HF)
It may be helpful to you
Keller's reagents
Keller's reagent (not too long)
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