Record Display for the EPA National Library Catalog


Main Title Effects of Sheltering and Orientation on the Atmospheric Corrosion of Structural Metals.
Author Carter, J. P. ; Linstrom, P. J. ; Flinn, D. R. ; Cramer, S. D. ;
CORP Author Bureau of Mines, Avondale, MD. Avondale Research Center.;Environmental Protection Agency, Research Triangle Park, NC. Atmospheric Sciences Research Lab.
Year Published 1987
Report Number EPA/600/D-87/098;
Stock Number PB87-174827
Additional Subjects Metal protection ; Atmospheric corrosion tests ; Shelters ; Orientation ; Exposure ; Dissolving ; Precipitation ; Alloys ; Zinc ; Copper ; Sulfur dioxide ; Particles ;
Library Call Number Additional Info Location Last
NTIS  PB87-174827 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 26p
The Bureau of Mines, U.S. Department of the Interior, is conducting atmospheric corrosion tests on five alloys and two coated-steel products at five sites as part of the National Acid Precipitation Assessment Program. Tests have been conducted on samples boldly exposed to the atmosphere, sheltered from the atmosphere, and facing skyward and groundward. Details of the corrosion process related to orientation and sheltering and involving particulates, corrosion film chemistry and morphology, and the dissolution/reprecipitation process were established. The corrosion film on zinc saturates with sulfur at around 7 wt pct with increasing ambient sulfur dioxide concentration. Zinc corrosion on the skyward side appears to be cathodically protected in two-sided old exposures. Only large particulates are present on the surface of sheltered copper and zinc; small particulates dissolve and disperse into the corrosion film. The dissolution/reprecipitation process occurs primarily during the final stages of drying. The information is essential to the development of damage models for the effects of acid deposition of metallic materials.