Other Etchants

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%

 Oxalic etching solution

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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