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C15: Using Our Resources - Coggle Diagram
C15: Using Our Resources
15.1 Rusting
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Sacrificial protection protects against rusting by attaching a more reactive metal (zinc, magnesium, or aluminium)
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15.4 Glass, ceramics, and composites
Soda glass is made by heating sand, limestone, and sodium carbonate
Borosilicate glass is made from sand and boron trioxide (melts at a higher temperature than soda-lime glass)
Clay ceramics include pottery & bricks, made by shaping wet clay then heating in a furnace
Composites are usually made of 2 materials, one acting as a binder which improving a desired property neither could offer alone (e.g. concrete, plywood)
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15.2 Useful alloys
Harder than pure metals, the regular layers in a pure metal are distorted by a different sized atom
Copper, gold, aluminium are all alloyed with other metals to make them harder
Carefully controlled quantities of carbon and other elements are added to iron to make steel alloys with different properties
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