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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.

Article no.: 18997

Microetching agent for Sb alloys

  •   Container size and order number Net price Amount
    Etching agent acc. to CZOCHRALSKI - 100 ml
    Order number: 18997.00100
    21,56 €
    Etching agent acc. to CZOCHRALSKI - 250 ml
    Order number: 18997.00250
    27,12 €
    Etching agent acc. to CZOCHRALSKI - 500 ml
    Order number: 18997.00500
    32,08 €
    Etching agent acc. to CZOCHRALSKI - 1.000 ml
    Order number: 18997.01000
    42,35 €
    Etching agent acc. to CZOCHRALSKI - 2.500 ml
    Order number: 18997.02500
    84,96 €

Important Information

Warning labels:

Lagerung: 15 … 25 °C

Haltbarkeit: 24 Monate

product information

Relevant Incredients:
• Hydrochloric Acid 37%
• Sodium thiosulfate • 5 H2O
• Chromic Acid 10 %

Technical informations

specifications

Hazard and safety instructions

Signal Word 1: Gefahr
Signal Word 2: skull, silhouete, Aquatic-pollut-red, acid_red
Warning labels: