1. By: Daisy, Zoe, Poppy, Lois, Leo
Corrosion of Metals
By: Daisy, Zoe, Poppy, Lois, Leo

2. vocabulary corrosion is the gradual destruction of materia,
reddish fairly red in colour
patina a green, black or brown layer that forms on the surface of some metals
degrade to change or make stn change to a simpler chemical form
porous having many small holes that allow water or air to pass through slowly
underlying existing under the surface of sth else

3. air Cu 2Cu＋O2＋H2O＋CO2===Cu2（OH）2CO3 O2.H2O.CO2 The oxidation of Cu :
The Green Lady-The Statue of Liberty in New York Harbor
The oxidation of Cu :
2Cu＋O2＋H2O＋CO2===Cu2（OH）2CO3

4. The oxidation of Fe:
2Fe+3O2===2Fe2O3

5. Methods of protection from corrosion
Applied coatings
Plating, painting, and the application of enamel are the most common anti-corrosion treatments.
They work by providing a barrier of corrosion-resistant material between the damaging environment and the structural material.
Painted coatings are relatively easy to apply and have fast drying times although temperature and humidity may cause dry times to vary.
Galvanized surface
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6. Methods of protection from corrosion
Oxidation film
The aluminum oxide coating is tough and closely packed.It protects the underlying aluminum from further corrosion
Alter the internal structure of a metal
Add chromium and nickel to plain steel in order to make stainless steel
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7. 3e-
2e-
Oxidized reduced
reducing agent oxidizing agent

8. THE END,THANK YOU!