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KIT: Etchant according to LICHTENEGGER and BLOECH

KIT: Etchant according to LICHTENEGGER and BLOECH consists of ammonium hydrogen difluoride (NH4HF2, CAS-No: 1341-49-7) and potassium metabisulfite (K2S2O5) in a 0.5% solution. It is successfully used for metallographic examination of austenitic CrNi steels and has proved useful in scientific laboratories. The main application is to color austenite and leave delta ferrite white.

The chemistry behind this product is based on the reaction between the two main components. The reaction of ammonium hydrogen difluoride and potassium metabisulfite creates a color etching solution that produces different colors on the metal surface depending on the exposure time.

The chemical properties of ammonium hydrogen difluoride allow it to etch glass and attack the metal surface during the etching process. Therefore, it is important to store the color etchant in a plastic container after the solution is prepared. The chemical reaction selectively attacks and colors the surfaces of the different phases in the steel, allowing a clear distinction between the austenitic and delta ferrite phases.

The results that can be obtained with this product depend on the exposure time: the longer the wet etching, the more intense the colors. This allows a detailed analysis of the microstructures and an improved classification of the examined crni-steels.

In summary, KIT: Etchant according to LICHTENEGGER and BLOECH is characterized by its application in the metallography of austenitic CrNi-steels.

Article no.: 18877

For austenitic CrNi steels.

  •   Container size and order number Net price Amount
    KIT: Etchant according to LICHTENEGGER and BLOECH - 100 ml
    Order number: 18877.00100
    19,05 €
    KIT: Etchant according to LICHTENEGGER and BLOECH - 250 ml
    Order number: 18877.00250
    20,63 €
    KIT: Etchant according to LICHTENEGGER and BLOECH - 500 ml
    Order number: 18877.00500
    36,06 €
    KIT: Etchant according to LICHTENEGGER and BLOECH - 1.000 ml
    Order number: 18877.01000
    72,53 €
    KIT: Etchant according to LICHTENEGGER and BLOECH - 2.500 ml
    Order number: 18877.02500
    159,70 €

Important Information

UN-Nummer: 3264

Warning labels:

Lagerung: 15 … 25 °C

Haltbarkeit: 24 Monate

safety data sheet

product information

Components of this kit:
• Ammonium hydrogen difluoride, Artikel-Nr.:18871
• Potassium metabisulphite 0,5 %, Artikel-Nr.:19330

Technical informations

specifications

Instructions / Protocol / Recommendations

Verwendung:

Farbätzmittel für austenitische CrNi- Stähle. Austenit wird bunt gefärbt. Delta - Ferrit bleibt weiß. Nassätzung mit s bis min Einwirkdauer. Nach dem Ansetzen der Lösung in Plastikbehälter aufzubewahren. Ammoniumhydrogendifluorid ätzt Glas!

Hazard and safety instructions

Signal Word 1: Gefahr
Signal Word 2: acid_red, exclam, ,
Warning labels: