C10 Using resources - Triple

Which is NOT used as a prevention of corrosion?

• greasing

• painting

• electroplating

• thermosetting

What is corrosion?

• The destruction of materials by chemical reactions with substances in the environment

• When a coating is more reactive than the metal used. E.g. zinc is used to galvanise iron.

• When a material with a matrix or binder surrounding and binding the fibres or fragments of the other material, provides reinforcement.

• When a material is decomposed by microorganisms

What is needed for rusting?

• Both water and air

• Air only

• Water only

• Both oxygen and carbon dioxide

What is sacrificial protection?

• The destruction of materials by chemical reactions with substances in the environment

• When a coating is more reactive than the metal used. E.g. zinc is used to galvanise iron.

• When a material with a matrix or binder surrounding and binding the fibres or fragments of the other material, provides reinforcement.

• When a material is decomposed by microorganisms

Name an alloy

• bronze

• gold

• silver

• platinum

Why are alloys used?

• To provide better properties than the main metal.

• To save money

• To reduce the use of limited resources

• To provide energy

What is a thermosoftening polymer?

• They melt when they are heated.

• They conduct electricity

• They are ductile

• They are brightly coloured

What is a thermosoftening polymer?

• They do not melt when they are heated.

• They conduct electricity

• They are ductile

• They are brightly coloured

What is a composite?

• The destruction of materials by chemical reactions with substances in the environment

• When a coating is more reactive than the metal used. E.g. zinc is used to galvanise iron.

• It is made of two or more materials, usually with a matrix or binder surrounding and binding the fibres or fragments of the other material, providing reinforcement.

• When a material is decomposed by microorganisms

Which is not a ceramic?

• glass

• pottery

• bricks

• metal