Sodium HydroxideNaOH
Al-NaOH Etchant
Material Specific
Composition
10-20g NaOH, 100ml H₂O
10-20%
Method
Immersion
Time
30s
Alternative Names
Tags
Reveals
Grain boundaries, precipitates
Typical Results
For aluminum alloys. Reveals grain structure.
Color Effects
Grain boundaries dark
Compatible Materials
Incompatible Materials
Application Method
Method:immersion
Typical Time:30 seconds
Temperature:50 °C
Preparation Notes
CAUTION: NaOH is caustic. Dissolve 10-20g NaOH in 100ml water. Use at 50°C.
Application Notes
Immerse sample at 50°C for 30-60 seconds. Rinse immediately with water.
Troubleshooting
Use hot for better results. CAUTION: Caustic - use proper PPE.
Storage Notes
Store in plastic container. Label clearly. Caustic hazard.
Alternative Etchants
- Keller's Reagent
Similar Etchants
- Keller's Reagent