SEDL / STP / STP965-EB / STP25862S

A Study of the Effects of Dry and Wet Deposition on Galvanized Steel and Weathering Steel: A Three-year Field Exposure

Spence, JW
Research chemist, U.S. Environmental Protection Agency, Research Triangle Park, NC

Haynie, FH
Chief of special techniques group, U.S. Environmental Protection Agency, Research Triangle Park, NC

Stiles, DC
Senior engineer and principal scientist, Northrop Services Inc., Research Triangle Park, NC

Edney, EO
Senior engineer and principal scientist, Northrop Services Inc., Research Triangle Park, NC

Pages: 15    Published: Jan 1987

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Abstract

At an exposure site located at Research Triangle Park, NC an automatic covering device was installed to partition the effects of dry and wet deposition on the corrosion of galvanized steel and weathering steel samples. Mass loss was used as the measure of corrosion of both metals. Meteorological and air quality were recorded continuously during the 36-month exposure study and evaluated to eliminate errors and to estimate missing data. Models were derived to describe the corrosion of galvanized steel and weathering steel. Rainfall was found to be a significant factor for the corrosion of both metallic materials.