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IGCSE Metal :red_flag: :red_flag:, ? (Painting), Mild Steel - Coggle…
IGCSE Metal
:red_flag: :red_flag:
Reactivity Series
The order of reactivity (from high to low)
Al
C
Mg
Zn
Na
Fe
Ca
Sn
K
Pb
Metal Extraction
Reactivity and Reduction
iron is less reactive than carbon,so it can react with carbon monoxide,but aluminium is more reactive,so it just can extract by electrolysis
Extraction of iron
by reduction with carbon monoxide (blast furnace),5chemical equations
Extraction of aluminium.By electrolysis,anode should change regularly,cryolite function also important
Prevent Rusting
electroplating
painting
oiling
plastic covering
Prevent Corrosion
Methods
Electroplating
Galvanising
Plastic coatings
Sacrificial protection
Metal and Alloy
Metal
Properties
Uses
Fe
Cast iron
Girders
Utensils
Castings
rails
Stainless steel
Cutlery
Surgical instrument
Al
Cu
Wires
Alloy
Properties
High melting point
Hard
Uses
Displacement Reaction
metals compete for oxygen or anions
Oxidization is loss of.electrons :Reduction is gain of electron
?
Painting
Mild Steel
Car bodies