0.5% Hydrofluoric AcidHF 0.5%
0.5% HF
Material Specific
Composition
0.5ml HF, 99.5ml H₂O
0.5%
Method
Immersion
Time
10s
Alternative Names
Tags
Reveals
Grain boundaries, precipitates
Typical Results
Light etchant for aluminum alloys. Less aggressive than Keller's reagent. Good for sensitive microstructures.
Color Effects
Grain boundaries dark
Compatible Materials
Incompatible Materials
Application Method
Method:immersion
Typical Time:10 seconds
Preparation Notes
CAUTION: HF is extremely hazardous. Mix 0.5ml HF with 99.5ml water in plastic container. Use fume hood and proper PPE.
Application Notes
Immerse sample for 10-20 seconds. Swab if needed. Rinse immediately with copious water.
Troubleshooting
HF causes severe burns. Use in fume hood with proper PPE. Have calcium gluconate gel available. Less aggressive than Keller's reagent.
Storage Notes
Store in plastic container. Label clearly. Extremely hazardous.
Alternative Etchants
- Keller's Reagent
- Al-NaOH Etchant
Similar Etchants
- Keller's Reagent