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GCSE Design and Technology · key term
The deterioration of a material through chemical reactions with its environment; rusting of iron and steel is an example.
Used by AQA
Paper 1
Revise: Surface treatments and finishesCorrosion is deterioration caused by reactions between a material and its environment. Iron and steel rust when exposed to water and oxygen. This involves oxidation: reaction with oxygen to form oxides.
The gradual deterioration of a material through chemical reactions with substances in its environment.
Distinguish appearance from performance. Colour and gloss are aesthetic benefits; reduced corrosion, staining or friction are functional benefits.
Distinguish rusting from corrosion: rusting applies specifically to iron.
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