University of Cambridge

CorTen Weathering Steel, Rocky Mountains

H. K. D. H. Bhadeshia

"CorTen" or Corten is a weathering steel invented in the USA. It contains small concentrations of copper (0.25-0.55 wt%) and chromium (0.5-1.25 wt%), that help it develop a layer of patina. This layer of rust is more adherent and less porous than conventional rust. The latter in fact forms in the water in front of the steel and hence detaches easily, whereas the patina on Corten adheres. The major advantage is that little or no maintenance is required and the steel does not need to be painted.

Harry was taken to visit the Rocky Mountains by David Matlock of the Colorado School of Mines.

Corten weathering steel, Harry Bhadeshia, Rocky Mountains, Metallurgy

Corten is a weathering steel that develops a protective patina. Here in the Rocky Mountains close to Golden, Colorado School of Mines. Frank Lloyd Wright made extensive use of Corten in the construction fo the visitor centre in the Rocky Mountains
Corten weathering steel, Harry Bhadeshia, Rocky Mountains, Metallurgy

Corten is a weathering steel that develops a protective patina. Here in the Rocky Mountains close to Golden, Colorado School of Mines
Corten weathering steel, Harry Bhadeshia, Rocky Mountains, Metallurgy

Rocky Mountains in April
Corten weathering steel, Harry Bhadeshia, Rocky Mountains, Metallurgy

Many of the fences in the Rocky Mountains near Golden are made from Corten, and hence require negligible maintenance. Corten is a weathering steel that develops a protective patina.


Corten weathering steel, Harry Bhadeshia, Rocky Mountains, Metallurgy

Corten is a weathering steel that develops a protective patina. Here in the Rocky Mountains close to Golden, Colorado School of Mines
Corten weathering steel, Harry Bhadeshia, Rocky Mountains, Metallurgy

Many of the fences in the Rocky Mountains near Golden are made from Corten, and hence require negligible maintenance. Corten is a weathering steel that develops a protective patina.
Corten weathering steel, Harry Bhadeshia, Rocky Mountains, Metallurgy

Corten is a weathering steel that develops a protective patina. Here in the Rocky Mountains close to Golden, Colorado School of Mines
Corten weathering steel, Harry Bhadeshia, Rocky Mountains, Metallurgy

Corten is a weathering steel that develops a protective patina. Here in the Rocky Mountains close to Golden, Colorado School of Mines
Corten weathering steel, Harry Bhadeshia, Rocky Mountains, Metallurgy

Corten is a weathering steel that develops a protective patina. Here in the Rocky Mountains close to Golden, Colorado School of Mines
Corten weathering steel, Harry Bhadeshia, Rocky Mountains, Metallurgy

Feels surprisingly warm to the touch. Corten is a weathering steel that develops a protective patina. Here in the Rocky Mountains close to Golden, Colorado School of Mines
Corten weathering steel, Harry Bhadeshia, Rocky Mountains, Metallurgy

Corten is a weathering steel that develops a protective patina. Here in the Rocky Mountains close to Golden, Colorado School of Mines
Corten weathering steel, Harry Bhadeshia, Rocky Mountains, Metallurgy

Corten is a weathering steel that develops a protective patina. Here in the Rocky Mountains close to Golden, Colorado School of Mines
Corten weathering steel, Harry Bhadeshia, Rocky Mountains, Metallurgy

Corten is a weathering steel that develops a protective patina. Here in the Rocky Mountains close to Golden, Colorado School of Mines
Corten weathering steel, Harry Bhadeshia, Rocky Mountains, Metallurgy

Corten is a weathering steel that develops a protective patina. Here in the Rocky Mountains close to Golden, Colorado School of Mines
Corten weathering steel, Harry Bhadeshia, Rocky Mountains, Metallurgy

Corten is a weathering steel that develops a protective patina. Here in the Rocky Mountains close to Golden, Colorado School of Mines
Corten weathering steel, Harry Bhadeshia, Rocky Mountains, Metallurgy

Corten is a weathering steel that develops a protective patina. Here in the Rocky Mountains close to Golden, Colorado School of Mines
Corten weathering steel, Harry Bhadeshia, Rocky Mountains, Metallurgy

Corten is a weathering steel that develops a protective patina. Here in the Rocky Mountains close to Golden, Colorado School of Mines
Corten weathering steel, Harry Bhadeshia, Rocky Mountains, Metallurgy

Corten is a weathering steel that develops a protective patina. Here in the Rocky Mountains close to Golden, Colorado School of Mines
Corten weathering steel, Harry Bhadeshia, Rocky Mountains, Metallurgy

Corten is a weathering steel that develops a protective patina. Here in the Rocky Mountains close to Golden, Colorado School of Mines
Corten weathering steel, Harry Bhadeshia, Rocky Mountains, Metallurgy

This is the creek that flows through Golden, Colorado. Corten is a weathering steel that develops a protective patina.
Corten weathering steel, Harry Bhadeshia, Rocky Mountains, Metallurgy

The bridge across the creek in Golden, Colorado, is made from Corten
Corten weathering steel, Harry Bhadeshia, Rocky Mountains, Metallurgy

The bridge across the creek in Golden, Colorado, is made from Corten


Weathering steel in London

Weathering steel, Corten, rust pedestrian bridge, near the old wall of London
Weathering steel pedestrian bridge, near the old wall of London
Weathering steel, Corten, rust pedestrian bridge, near the old wall of London
Weathering steel pedestrian bridge, near the old wall of London
Weathering steel, Corten, rust pedestrian bridge, near the old wall of London
Weathering steel pedestrian bridge, near the old wall of London
Weathering steel, Corten, rust pedestrian bridge, near the old wall of London
Weathering steel pedestrian bridge, near the old wall of London
Weathering steel, Corten, rust pedestrian bridge, near the old wall of London
Weathering steel pedestrian bridge, near the old wall of London
Weathering steel, Corten, rust pedestrian bridge, near the old wall of London
Weathering steel pedestrian bridge, near the old wall of London
Weathering steel, Corten, rust pedestrian bridge, near the old wall of London
Weathering steel pedestrian bridge, near the old wall of London
Weathering steel, Corten, rust pedestrian bridge, near the old wall of London
Weathering steel pedestrian bridge, near the old wall of London
Weathering steel, Corten, rust pedestrian bridge, near the old wall of London
Weathering steel pedestrian bridge, near the old wall of London






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