Page 406 - Corrosion Engineering Principles and Practice

374 C h a p t e r 9 A t m o s p h e r i c C o r r o s i o n 375

FIGURE 9.47 Triad by Ted Bieler completed in 1984 using stainless steel.

by a short production of 17 planes for the U.S. Navy. Unfortunately, the
Conestoga was not a success, due to undesirable handling qualities, and
a further contract for 180 planes was canceled.

9.7.2 Copper and Copper Alloys
Copper and its alloys are not exposed to the atmosphere in great quantities
when compared with steel. However, this material brings aesthetic value
to building construction, in addition to excellent corrosion resistance. The
black and then green patina formed on the surface provides an attractive
decorative finish, while sealing the metal from further corrosion. As a
consequence, some copper has been used for roofs, gutters, and as
flashings on wood or composition shingled roofs.
Extensive tests have been made of the corrosion resistance of copper
and its alloys. Various alloys were exposed in rural, industrial, and marine