Rust and Corrosion: Chemistry, Causes & Prevention Guide
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22 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) as described here?
Answer: The bonding of a thin layer of metal to another type of metal using an electric current.
Question: Write the chemical description given for the formation of rust.
Answer: Iron + Oxygen → Iron Oxide.
Question: What conditions lead to metals rusting according to the content?
Answer: Exposure to air with moisture; oxygen in the air dissolves in the moisture and reacts with the iron in the metal to form rust.
Question: What are the observable properties of rust listed?
Answer: Rust is red-brown, flaky, and solid.
Question: How does rust cause danger to support structures?
Answer: Rust weakens metal support structures so they cannot support as much weight as they should.
Question: How does rust affect electrical properties of metals?
Answer: Rust acts as an insulator, hindering electrical conductivity.