WORKING WITH IRON AND CAST IRON

Iron finds are usually just lumps of rust.

Method 1: Electrolysis ⚡

The most effective method.

• A 9–12 V power supply
• Water + baking soda (electrolyte)
• **NEGATIVE** lead — to the find, **POSITIVE** lead — to the anode (an axe head/scrap iron)
• The pieces must not touch each other!
• Time: until the bare metal is exposed
• **Afterward:** preservation (oiling) is mandatory

Method 2: Azelit (for cast iron)

Soak for 1 minute, then brush off the crust.

Method 3: Heat + brush

• Heat with a torch until red-hot
• Scrub off the oxides with a wire brush
• Repeat, finishing with a final heating
• Dunk in hydraulic oil — for preservation

Method 4: Caustic soda

Soak, leave it for a while, then take it out and brush it clean.

Preserving iron

Bluing: heat to 200–300°C and dip in machine oil, or rub with linseed oil.