Modified Marble's Reagent

material specific

Composition

4g CuSO₄, 20ml HCl, 20ml H₂O

Mixed

Method

immersion

Time

30s

Basic Information

Category:Material Specific

Composition:4g CuSO₄, 20ml HCl, 20ml H₂O

Concentration:Mixed

Reveals:Grain boundaries, gamma prime, carbides

Typical Results:Variant of Marble's reagent for nickel-niobium superalloys (Inconel 718, Rene 41). Lower copper-sulfate loading gives gentler attack appropriate for the precipitate-strengthened microstructure.