For cobalt and Co-Al alloys:

  • Adler’s reagent

For magnesium and Mg-Mn, Mg-Al, Mg-Al-Zn, Mg-Zn-Zr alloys:

  • Nital Etch, 2%

For pure nickel and high nickel alloys:

  • Marble’s reagent (aggressive)

For refractory metals:

  • Murakami’s reagent (Cr, Mo, Re, Ta-Mo, W, V, WC-Co, and sintered carbides)

For Ni-Ti Nitinol alloy:

  • ASTM 151

For T22/P22 steel replica:

  • Nital Etch, 5%

For T91/P91 steel replica:

  • Vilella’s Reagent
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