C20 Flashcards
What is corrosion?
the destruction of a material through reactions with substances in the environment
What physical barriers can be used to protect against corrosion?
grease, paint, a thin layer of metal
What is sacrificial protection?
adding a more reactive metal to the surface of a material
How is rust formed?
reaction between iron, water, and oxygen
What are two alloys of copper?
brass and bronze
What are gold alloys in jewellery made from?
gold with copper, zinc, and silver
What are steel alloys made from?
iron, carbon, and other metals
What is a property of aluminium alloys?
generally have low densities
What is the main difference between soda-lime and borosilicate glass?
borosilicate glass has a much higher melting point
Give two examples of clay ceramics
pottery and bricks
What two things do the properties of polymers depend on?
monomers and the conditions under which they are formed
What is the main difference between thermosetting and thermosoftening polymers?
thermosetting polymers do not soften when heated, thermosoftening polymers do
What is a composite?
a mixture of a matrix and reinforcements
Name two composites.
plywood and reinforced concrete
