Sodium Metabisulfite (10%)

Specialty

Composition

10g Na₂S₂O₅, 100ml H₂O

10%

Method

Immersion

Time

30s

Alternative Names

Prior austenite grain boundaries

For revealing prior austenite grain boundaries in quenched and tempered steels. Important for heat treatment analysis.

Prior austenite boundaries dark

Method:immersion

Typical Time:30 seconds

Dissolve 10g sodium metabisulfite (Na₂S₂O₅) in 100ml distilled water. Prepare fresh solution.

Immerse sample for 30-60 seconds. Swab gently if needed. Rinse with water.

Prepare fresh for best results. Solution decomposes over time. Important for heat treatment analysis.

Store in dark bottle. Prepare fresh when needed. Shelf life: 1-2 days.