Corrosion & Its Prevention (OCR GCSE Chemistry A (Gateway Science Suite)): Flashcards
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Corrosion definition
Corrosion definition
Process where metals deteriorate via chemical reactions with environment
Most well-known form of corrosion
Most well-known form of corrosion
Rusting
What iron reacts with to cause rusting
What iron reacts with to cause rusting
Oxygen and water
Chemical name for rust
Chemical name for rust
Iron oxide
Effect of corrosion on metals
Effect of corrosion on metals
Reduces structural integrity
How painting prevents corrosion
How painting prevents corrosion
Creates protective barrier preventing environmental contact
What electroplating involves
What electroplating involves
Coating metal with thin layer of another metal using electrical current
How greasing prevents corrosion
How greasing prevents corrosion
Barrier prevents moisture and oxygen contacting metal
Metal that forms protective coating naturally
Metal that forms protective coating naturally
Aluminium
Property of aluminium oxide layer
Property of aluminium oxide layer
Inert - doesn't react further with environment
What galvanisation involves
What galvanisation involves
Coating metal with more reactive metal like zinc
How zinc provides sacrificial protection
How zinc provides sacrificial protection
Zinc corrodes first, protecting underlying iron from rusting