Which material is typically lightweight and corrosion resistant, such as aluminium or copper?

• A. Ferrous metal
• B. Thermoplastic
• C. Non-ferrous metal
• D. Design for recycling

Answer: (C)

Non-ferrous metals are metals that do not contain iron, so they don’t rust in the same way as ferrous metals and are often lighter. Aluminium is a classic example: it’s very light and forms a protective oxide layer that prevents further corrosion. Copper also resists many types of corrosion and maintains strength in harsh environments, though it can develop a patina over time. The other options don’t fit the description as well: ferrous metals contain iron and are more prone to rust, thermoplastics are plastics rather than metals, and design for recycling is a concept, not a material. So the category that matches lightweight and corrosion resistance is non-ferrous metal.