Iron

Physical identification

Forged and cast iron objects with potentially unstable corrosion. Record dimensions, weight, manufacture, surfaces, repairs, labels, mounts and inscriptions before cleaning or treatment.

Key cautions

• Chlorides can drive deterioration.
• Removing rust may erase evidence.
• Low humidity may be necessary.

Provenance and lawful movement

Document texture, joins, deposits, corrosion, movement and prior treatment. Stop handling when surfaces powder, flakes lift, corrosion appears active or cracks move.

Authenticity and conservation

Condition and authenticity can be intertwined. Artificial deposits, modern joins and restored surfaces may disguise manufacture. No single photograph, certificate or test proves the complete history of an object.