Etchant | Conc. | Conditions | Comments |
---|---|---|---|
Adlers Etchant Ferric chloride Copper ammonium chloride Hydrochloric acid Distilled water |
45 gm 9 gm 150 ml 75 ml |
Immerse for several seconds. | A very effective etchant for 300 series, austenitic, duplex stainless steels |
Carpenter Etchant Ferric chloride Cupric chloride Alcohol Hydrochloric acid Nitric acid |
8.5 gm 2.4 gm 122 ml 122 ml 6 ml |
Immerse for several seconds. | A nice etchant for 300 series, austenitic, duplex stainless steels |
Kalling' No. 2 Cupric chloride Hydrochloric acid Alcohol |
12 gm 20 ml 225 ml |
Immerse or swab - seconds to minutes | For 400 series or martensitic stainless steel |
Modified Murakami's K3Fe(CN)6 Potassium hydroxide Distilled water |
30 gm 30 gm 150 ml |
1 second to several minutes by immersion or swabbing |
Mix potassium hydroxide into water before adding K3Fe(CN)6. |
Hydrochloric acid Selenic acid Ethyl alcohol |
20-30 ml 1-3 ml 100 ml |
Immerse at room temperature for 1-4 minutes | Color etching. Colors carbides and gamma prime phase in heat resisting steels |
Ammonium bifluoride Potassium metabisulfite Distilled water |
20 gm 0.5 gm 100 ml |
Immersion at room temperature for 1-2 minutes | Color etching. Etching of austenitic stainless steel and welds. Reveals delta ferrite in welds. |
431 Stainless Steel, etched with Modified Murakami's, Mag. 400X (DIC) |
PACE Technologies
3601 E. 34th St.
Tucson, Arizona 85713
+1-520-882-6598
FAX +1-520-882-6599
email: pace@metallographic.com
https://www.metallographic.com