A process of covering one metal with another (usually achieved by pressure rolling, extruding, drawing, or swaging) until a bond is achieved.
In building construction, "cladding" may refer to the application of one material over another to provide a weather-proof layer intended to control the infiltration of weather elements. Cladding does not necessarily have to provide a water-proof condition but is instead a control element. This control element may only serve to safely direct water or wind in order to control run-off and prevent infiltration into the building structure. You can find further information on brick veneer / cladding here *Brick Cladding. Cladding applied to windows is often referred to as window capping and is a very specialized field. A number of excellent pictures illustrating window cladding can be found at http://www.windowcapping.com/ and many terms are also explained.
In nuclear reactors, cladding is the outer layer of the fuel rods, standing between the coolant and the nuclear fuel. It is made of a corrosion-resistant material with low absorption cross-section for thermal neutrons, usually Zircaloy or steel in modern constructions, or magnesium oxide with small amount of aluminium and other metals for the now-obsolete Magnox reactors. Cladding prevents radioactive fission fragments from escaping the fuel into the coolant and thereby from cantaminating it. So fuel is wrapped in a non-fuel-bearing material such as stainless steel or Zircaloy.
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Cladding is prevalently applied at the mill stage by the manufacturers of sheet, plate or tubing.
Cladding by pressing, rolling or extrusion can produce a coating in which the thickness and distribution can be controlled over wide ranges and the coatings produced free of porosity.
Among the principal uses are aluminum cladding in the aircraft industry, lead and cadmium sheathing for cables, lead-sheathed sheets for architectural applications and composite extruded tubes for heat exchangers.
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