miscellaneous definitions Flashcards
1
Q
corrosion
A
The reaction of the surface of the metal with oxygen (from the air), water, acid or other chemicals. Corrosion is a chemical reaction.
2
Q
tarnishing
A
Metal loses its shine because a layer of corrosion forms on the surface eg. Aluminium or Silver. It is usually due to the metal reacting with chemicals in the air.
3
Q
rusting
A
Specifically the corrosion of iron (requires water and oxygen)
4
Q
diffusion
A
when particles move from a high concentration to a low concentration
5
Q
oxidation
A
the reaction of a substance with oxygen
6
Q
combustion
A
a chemical reaction between substances, usually including oxygen and usually accompanied by the generation of heat and light in the form of flame - exothermic
