Rust & Protection

Fighting an unwanted cell

An interactive lesson with 5 steps, about 5 minutes: you predict, drag and solve, with instant feedback on every answer. It runs in your browser and needs JavaScript.

What you’ll learn

• Rusting is a galvanic cell: iron oxidised, oxygen reduced.
• Sacrificial anodes (Zn, Mg) corrode instead of iron.
• A less reactive metal touching iron makes iron rust faster.

Steps

1. Rust is a tiny battery
2. A drop on steel
3. Protect the hull
4. Galvanised versus tinned
5. Lady Liberty