Etching agent acc. to CZOCHRALSKI
The Czochralski etchant consists of distilled water, fuming hydrochloric acid, sodium thiosulfate-5-hydrate and chromium(IV) oxide solution. It is a special solution for metallography and scientific laboratories. One of the main fields of application is the etching of surfaces of Sb alloys (antimony alloys), where the grain structure and its boundaries are to be studied.
Chemically, the etchant consists of a combination of aqua dest. (H2O), hydrochloric acid (HCl, 37%), sodium thiosulfate-5-hydrate (Na2S2O3-5H2O), and chromic acid (H2CrO4, 10% solution). The chemical reactions are complex, but particularly concern the surface oxidation of antimony by chromium(VI) and its subsequent reduction, as well as the solubility of metals in the acidic solution.
The results of the application of the etchant depend on the exact composition of the alloy, the etching time and the temperature during the etching process. Usually, after successful application, a clear representation of the grain structure and any phases present in the metal surface being examined is seen.
In metallography, the etchant is used to make grain structures visible for microscopy. In this process, solution A and B are mixed in a 1:1 ratio as soon as chromium(VI) oxide solution is added just before use. The etching time varies from a few seconds to minutes. The Czochralski etchant is thus primarily used for the examination of Sb alloys.
Chemically, the etchant consists of a combination of aqua dest. (H2O), hydrochloric acid (HCl, 37%), sodium thiosulfate-5-hydrate (Na2S2O3-5H2O), and chromic acid (H2CrO4, 10% solution). The chemical reactions are complex, but particularly concern the surface oxidation of antimony by chromium(VI) and its subsequent reduction, as well as the solubility of metals in the acidic solution.
The results of the application of the etchant depend on the exact composition of the alloy, the etching time and the temperature during the etching process. Usually, after successful application, a clear representation of the grain structure and any phases present in the metal surface being examined is seen.
In metallography, the etchant is used to make grain structures visible for microscopy. In this process, solution A and B are mixed in a 1:1 ratio as soon as chromium(VI) oxide solution is added just before use. The etching time varies from a few seconds to minutes. The Czochralski etchant is thus primarily used for the examination of Sb alloys.
Article no.: 18997
Microetching agent for Sb alloys
Important Information
Sales restriction: no private users!
Warning labels:
Lagerung: 15 … 25 °C
Haltbarkeit: 24 Monate
product information
Relevant Incredients:
• Hydrochloric Acid 37%
• Sodium thiosulfate • 5 H2O
• Chromic Acid 10 %
Hazard and safety instructions
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