Corrosion And Prevention of corrosion

•   Corrosion is the oxidative deterioration of metal.
•   25% of steel produced goes to replace steel structures and products destroyed by corrosion.
•  Rusting of iron requires the presence of both oxygen and water.
•   Rusting results from tiny galvanic cells formed by water droplets.

Prevention of corrosion

•  Galvanizing: is the coating of iron with zinc. Zinc is more easily oxidized than iron, which protects and reverses oxidation of the iron.
•   Cathodic Protection: is the protection of a metal from corrosion by connecting it to a metal (a sacrificial anode e.g. Mg or Zn) that is more easily oxidized.
•   Electroplating.
•   By applying paint, grease, rubber to prevent contact of metal surface from air.