1. Prevention of Corrosion

2. type 1
Cathodic Protection

3. Cladding Method: bonding layers of the aluminum alloy Examples:
so-called rolled gold, which consists of a brass or steel core with a layer of gold on the outside

5. Galvanizing
Method:
coating a base metal, such as iron or steel, with a thin layer of zinc to protect the base metal from corrosion
Advantage:
Zinc is applied with greater ease and lower cost

7. Similarities
find a lower metal on the Reduction Table in order to react before the Fe does

8. Cathodic Protection
" a metal lower on the Reduction Table (higher oxidation potential ) is attached to or brought near to the Fe"
Chemistry 12 Notes on Unit 5-Redox

9. Some common examples of Cathodic ProtectionMg
stainless steel

10. type 2

11. Ceramic Materials Method: coat metal with ceramic enamel Advantage:
harder, better corrosion resistance

13. cover materials to the metal, prevent the contact of the metal, oxygen, and moisture

14. type 3

15. Impressed current
a coltage is applied with an external power supply to keep the Fe slightly negative. Thus, the Fe surface has excess e-s so it doesn't have to oxidize in order to supply e-s to O2
P55 of the note