Phosphoric Acid ElectrolyticElectrolytic Phosphoric
10% Phosphoric Acid (Electrolytic)
Electrolytic
Composition
10ml H₃PO₄, 100ml H₂O
10%
Method
Electrolytic
Time
30s
Alternative Names
Tags
Reveals
Grain boundaries, phases
Typical Results
Electrolytic etchant for stainless steels. Good for revealing grain structure without over-etching.
Color Effects
Grain boundaries dark
Compatible Materials
Incompatible Materials
Application Method
Method:electrolytic
Typical Time:30 seconds
Voltage:6 V
Current Density:0.1 A/cm²
Preparation Notes
Mix 10ml concentrated phosphoric acid (H₃PO₄) with 100ml distilled water. Use as electrolyte in electrolytic etching setup.
Application Notes
Use as electrolyte with stainless steel cathode. Apply 6V DC, 0.1 A/cm² current density for 30-60 seconds. Sample is anode. Rinse with water after etching.
Troubleshooting
Ensure good electrical contact. If no etching occurs, check connections and increase voltage slightly. If over-etching, reduce time or current density.
Storage Notes
Store in glass bottle. Shelf life: several months. Solution is stable.
Alternative Etchants
- 10% Oxalic Acid (Electrolytic)
- Chromic Acid (Electrolytic)
Similar Etchants
- 10% Oxalic Acid (Electrolytic)