Question

List different etching agents used for specimen preparation

Answer 1

Different etching agents used for specimen preparation are as follows

1. Nitric acid used for low carbon and medium carbon steel

2. Picric acid used for all grades carbon steel

3. Ferric chloride: used for copper and brass

4. Mixed acid: used for Lead, and Tin alloy

5. Ferric Chloride and HCl: used for stainless steel

These are the common etching agents, used for specimen preparation of different materials.