AQA GCSE Design and Technology · 8552
Paper 1
Revise: Surface treatments and finishesGalvanising coats steel or iron with zinc to protect against corrosion. In hot-dip galvanising, the metal is cleaned, immersed in molten zinc, then removed and cooled. Here, the protective layer is a metal, not paint or polymer powder.
- Revise: Applying surface treatments
Coating iron or steel with zinc to protect it against rusting.