Kroll's Reagent

Material Specific

Composition

2-3ml HF, 5ml HNO₃, 100ml H₂O

2-3%

Method

Swabbing

Time

Alternative Names

Alpha-beta phases, grain boundaries

Standard etchant for titanium alloys. Reveals alpha and beta phases with good contrast.

Alpha phase light, beta phase dark

Method:swabbing

Typical Time:5 seconds

CAUTION: HF is extremely hazardous. Mix 2-3ml HF, 5ml HNO₃, and 100ml water in plastic container. Use fume hood and proper PPE.

Swab sample for 5-15 seconds. Do not immerse. Rinse immediately with copious water.

HF causes severe burns. Always use in fume hood with proper PPE. Have calcium gluconate gel available.

Store in plastic container. Label clearly. Extremely hazardous - follow safety protocols.