Noble (cathodic or protected) end
Platinum,
gold
Silver
Titanium
Stainless steels, passive
Nickel, passive
High duty bronzes
Copper
Nickel, active
Millscale
Naval brass
Lead, tin
Stainless steels, active
Iron, steel, cast iron
Aluminium alloys
Aluminium
Zinc
Magnesium
Ignoble (anodic or corroding) end