Research Article
Oct 1969
Aluminum Corrosion at Urban and Industrial Locations
Publication: Journal of the Structural Division
Volume 95, Issue 10
Abstract
Seven-year exposures of several aluminum alloys, mild steel and zinc demonstrate the excellent corrosion resistance of aluminum in urban and industrial environments. Panels of aluminum-manganese alloys (3000 series) of the types used for siding, roofing and flashing along with the structural aluminum-magnesium silicide alloys (6000 series) showed seven-year corrosion rates which never exceeded 0.151 mpy (mils per year) in even the very severe environment at Widnes, England. In the Chicago area the same alloys had rates less than 0.067 mpy. The atmospheres at Richmond, Virginia, and Manila, Philippine Islands, were relatively mild toward aluminum while that at Phoenix, Arizona, had almost no effect on any aluminum material. By comparison, the corrosion rates of mild steel and zinc were greater than those for aluminum at all locations. The corrosion of the aluminum alloys was predominantly of the pitting type (generally pits were deepest on the skyward side at Manila, Phoenix, and Widnes). Changes in mechanical properties were, in most cases, of a magnitude not to affect the structural strength of the aluminum. Pitting depths never penetrated the panels to a depth greater than 14 mils.
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Information
Published In
Journal of the Structural Division
Volume 95 • Issue 10 • October 1969
Pages: 2141 - 2160
Copyright
© 1969 American Society of Civil Engineers.
History
Published in print: Oct 1969
Published online: Feb 1, 2021
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Authors
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William H. Ailor Jr.
Sr. Corrosion Engr., Reynolds Metals Co., Metallurgical Research Div., Richmond, Va.
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Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.