![]() ![]() Please contact Austral Wright Metals for details of Factory Pre-Patinated Copper Architecture.Ĭopper and copper alloys are widely used in architectural applications to take advantage of their inherent range of colours of patina on copper. Since some of the pre-patinated sheets have a variation in their final colour, it is recommended that the architect review material samples before final specifications. The patina is a chemical conversion process whereby the top molecular surface of the copper sheet is enhanced and forced to produce a natural patina. The large number of requests by the architectural community for a man-made copper patina has prompted copper mills to research and develop pre-patinated copper sheet products. In arid desert environments, the patina formation may never occur and the copper surface may remain a dark brown or bronze colour. In rural atmospheres, with relatively clean air patina formation may occur in 10 to 14 years. ![]() In industrial and marine atmospheres, the natural patina generally forms in 5 to 7 years. The natural weathering of copper from its bright pink to the characteristic blue-green colour (patina) is a direct consequence of its reaction to the corrosive action of the atmosphere. Factory Pre-Patinated Copper Table of Contents ![]()
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