What does corrosion involve?
Oxidation of metals
Reduction of metals
Thermal decomposition
What is needed for rusting to occur?
Air only
Water only
Air and water
Magnesium metal can be attached to a steel pipeline to prevent rusting. What name is given to this type of protection provided by magnesium?
Barrier
Sacrificial
Anodising
Rusting is the term used to describe the corrosion of which metal?
Zinc
Iron
Aluminium
Which metal is used in galvanising?
Magnesium
Copper
Which metal is usually electroplated onto the inside of steel food cans?
Tin
Which method of rust prevention is best suited to a bicycle chain?
Oiling
Painting
Coating with plastic
What is an alloy?
A pure metal
A metal with another metal mixed in
A soft type of metal
Why are alloys used?
Alloying improves the properties
Alloying makes the metal more reactive
Alloying makes the metal less toxic
Why does the structure of an alloy alter its strength?
Only strong metals are used
Alloying does not alter the strength
Different size particles disrupt the metallic structure