Rust & Corrosion Explained: Formation, Types, Prevention Guide
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21 cards
Question: What is 'moisture' as defined here?
Answer: Water vapour dissolved in the air that makes the air moist.
Question: What is rust?
Answer: A red-brown solid that forms on a metal and flakes off easily.
Question: What is corrosion?
Answer: Chemical attack on the surface of a metal, causing it to break down.
Question: What does it mean when a metal 'oxidises'?
Answer: It combines with oxygen.
Question: What is electroplating (electrolysis) in this content?
Answer: The bonding of a thin layer of metal to another type of metal using an electric current.
Question: Write the chemical equation given for the formation of rust.
Answer: Iron + Oxygen → Iron Oxide
Question: How does rust form on metals when exposed to air?
Answer: Oxygen in the air dissolves in moisture; the iron reacts with the oxygen in the moisture and forms rust (iron oxide).
Question: List three physical characteristics of rust mentioned.
Answer: Rust is red-brown, flaky, and solid.
Question: How does rust affect the strength of metal structures?
Answer: Rust causes corrosion that weakens metal, reducing its ability to support weight and leading to potential failure of support structures.
Question: How does rust affect electrical and magnetic properties of metals?
Answer: Rust acts as an insulator, hindering electrical conductivity, and it affects the magnetic properties of metals.