Flashcards on Rust and Corrosion: Formation, Types, and Prevention
Rust & Corrosion Explained: Formation, Types, Prevention Guide
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Rust and Corrosion of Metals
21 cards
Card 1
Question: What is 'moisture' as defined here?
Answer: Water vapour dissolved in the air that makes the air moist.
Card 2
Question: What is rust?
Answer: A red-brown solid that forms on a metal and flakes off easily.
Card 3
Question: What is corrosion?
Answer: Chemical attack on the surface of a metal, causing it to break down.
Card 4
Question: What does it mean when a metal 'oxidises'?
Answer: It combines with oxygen.
Card 5
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.
Card 6
Question: Write the chemical equation given for the formation of rust.
Answer: Iron + Oxygen → Iron Oxide
Card 7
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).
Card 8
Question: List three physical characteristics of rust mentioned.
Answer: Rust is red-brown, flaky, and solid.
Card 9
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.
Card 10
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.