Metallographic Etchants (Micro Etchants)

Metallographic etchants are chemicals that can reveal microstructural details that would otherwise not be evident on an as-polished sample. The etchant will selectively corrode microstructural features, such as grains or grain boundaries. These features can then be studied with a microscope.

  • Acidic Ferric Chloride
  • Adler's Reagent
  • Alpha Case, 2% HF
  • Cu Etch
  • Ferric Chloride Etchant
  • Fry's Reagent
  • Hydrochloric Acid Solution, 5%
  • Kalling's 2 Reagent
  • Keller's Reagent
  • Kroll's Reagent
  • Marble's Reagent
  • Murakami's Reagent
  • Nital Etch (2% to 5%)
  • Oxalic Etching Solution
  • Picral Etch
  • Superalloy Etch (Modified Kalling's)
  • Vilella's Reagent

Weld Inspection Etchants (Macro Etchants)

Weld inspection etchants are formulated by metallurgists to show weld nugget, heat affected zone, penetration depth, etc. These macro etching chemicals are very effective for visual inspection of welds.

  • Nital Etch
  • Fry's Reagent
  • Ammonium Persulfate Solution
  • Stainless Steel Weld Etch
  • Caustic Etching Solution
  • Copper Etch