Effect of Etching Methods in Metallographic Studies of Duplex Stainless Steel 2205

详细

Three different etching methods are used to uncover the ferrite-austenite structure and precipitates of secondary phases in stainless steel 22.5% Cr – 5.4% Ni – 3% Mo – 1.3% Mn. The structure is studied under a light microscope. The chemical etching is conducted in a glycerol solution of HNO₃, HCl and HF; the electrochemical etching is conducted in solutions of KOH and NaOH.