3. When metal are mixed to form
alloys there are 3 possibilities:
• Completely soluble, i.e. atoms of one will fit
exactly into the structure of the other without
disturbing it. (e.g. copper and nickel)
• Partially soluble, i.e. the atoms cannot form
structures together but crystals of each will mix.
(e.g. copper and zinc i.e. brass)
• Insoluble, e.g. molten iron will float on molten
lead, they will not mix
5. When metal are mixed to form
alloys there are 3 possibilities:
• Completely soluble, i.e. atoms of one will fit
exactly into the structure of the other without
disturbing it. (e.g. copper and nickel)
• Partially soluble, i.e. the atoms cannot form
structures together but crystals of each will mix.
(e.g. copper and zinc i.e. brass)
• Insoluble, e.g. molten iron will float on molten
lead, they will not mix
7. When metal are mixed to form
alloys there are 3 possibilities:
• Completely soluble, i.e. atoms of one will fit
exactly into the structure of the other without
disturbing it. (e.g. copper and nickel)
• Partially soluble, i.e. the atoms cannot form
structures together but crystals of each will mix.
(e.g. copper and zinc i.e. brass)
• Insoluble, e.g. molten iron will float on molten
lead, they will not mix
16. Some of the main non-ferrous
alloys used in construction
•
•
•
•
Copper
Zinc
Aluminium
Lead
17. The 3 grades of copper are
• Deoxidised copper, used for copper tube, suitable
for welding.
• Fire refined tough pitch copper, had higher
strength, thermal and electrical conductivity and
resistance to corrosion. Used for roof coverings.
These turn a pleasant green as surface corrosion
occurs. This corrosion product may stain adjacent
materials.
• Electrolytic tough pitch high conductivity copper.
Contains fewer impurities, has higher electrical
conductivity, used for electrical conductors.
