Metal Oxidation VS Electro-chemical Corrosion

Metal Oxidation and Prevention

Oxidation is a common corrosion in our daily lives  
Example: 4 Fe + 3 O2 2 Fe2O3       

Common prevention methods:

  • Insulation - Paint, Applied Coating, etc.
  • Passivation Materials - Stainless Steel, Aluminum, etc.

Electro-Chemical Corrosion


The Oxidation and Reduction chemical processes happening in electrolyte


The four components in Electro-Chemical Corrosion

l   Cathode

l   Anode

l   Electrolyte (sea water or soil)

l  Metallic path between Cathode and Anode


Cathode V.S. Anode 
Cathode is less active compared to anode, with a more positive potential