Microstructure of Nickel, Cobalt and their Alloys
Lucas’ Reagent
- 50 mL lactic acid
- 150 mL HCl
- 3 g oxalic acid
Lucas’s reagent for Fe-Ni, Ni- and Co-base superalloys. Use electrolytically at 1-2 V dc, for 10-20 s. Electrolyte can be made as a stock solution.
Molybdic Acid Reagent
- 100 mL water
- 100 mL HCl
- 100 mL HNO3
- 3 g molybdic acid
Molybdic acid reagent to reveal the dendritic structure of cast Ni-base superalloys. Mix and alloy to stand >1 h before use. Immerse specimen for several seconds. Can be stored.