Questions and Answers
What is the term used to describe the process of a metal being attacked by substances around it?
Corrosion
What is the colour of the coating formed on copper when it corrodes?
Green
Why are antioxidants added to food containing fats and oils?
To prevent oxidation
What is the result of corrosion on iron?
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What is the purpose of flushing bags of chips with nitrogen?
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What is the significance of corrosion of iron?
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Study Notes
Corrosion
- Iron articles appear shiny when new but develop a reddish brown powder over time, a process known as rusting.
- Rusting is a type of corrosion, where metals react with substances around them, such as moisture and acids.
- Corrosion can occur in other metals, resulting in distinct coatings, like black on silver and green on copper.
- Corrosion causes damage to metal objects, including car bodies, bridges, and iron railings, leading to significant financial losses.
- Iron corrosion is a particularly serious problem, with massive amounts of money spent on replacements annually.
Rancidity
- Fats and oils can become rancid when oxidized, changing their smell and taste.
- Rancidity can be prevented by adding antioxidants to food products containing fats and oils.
- Storing food in air-tight containers helps slow down oxidation.
- To prevent oxidation, manufacturers often flush bags of chips with nitrogen gas.
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Description
Learn about the process of corrosion, including rusting of iron, tarnishing of copper and silver, and how metals react with substances around them.
