<b><i>Technical Note:</i></b>Some Observations on Auto Body Rust Layers

Cleary, H. J.

doi:10.5006/1.3581926

Cited by 5 publications

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“…The formation and composition of atmospheric rust films on carbon steel and weathering steels has been discussed extensively in the literature (10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20)(21)(22).…”

Section: The First Is the Reaction Of Metal A With Environmental Specmentioning

confidence: 99%

Environmental Effects on Metallic Corrosion Products Formed in Short-Term Atmospheric Exposures

Flinn

Cramer

Carter

et al. 1986

ACS Symposium Series

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The Bureau of Mines has measured short-and long-term atmospheric corrosion damage on five metals and two metal-coated steel products at four sites in the east and northeast United States as part of the National Acid Precipitation Assessment Program to evaluate the effects of acid deposition on materials. The composition of the corrosion product on carbon steel, weathering steel, copper, zinc, and galvanized steel is relatively unchanged in 1-and 3-month exposures over a wide variety of environmental conditions. Spalling and runoff losses are observed on all metals. Massive reorganization of the corrosion film by a mechanism of cyclic dissolution and precipitation was observed on carbon steel, Cor-Ten A, zinc, and galvanized steel. Loss of corrosion product from zinc in runoff was a function of both dissolution in rain water and neutralization by hydrogen ion loading, with dissolution contributing the greater portion of the loss.The corrosion of metallic materials in the atmosphere has been studied extensively (1).The majority of the work in this area has been to determine the performance of materials and to evaluate mitigation techniques in environments of interest.With only a few exceptions (see for example references 2, 3), attempts have not been made in studies conducted in the United States to fully characterize the environment and to determine the relationships between components of the environment and the performance of the material of interest (see reference 4 for a recent assessment of this area). Adherent corrosion products are often characterized, but no attempts have been made, except in laboratory studies (5), to quantitatively relate the corrosion film chemistry to environmental parameters.In 1981, a field study was initiated by the Bureau of Mines to determine the effects of the environment, including acid deposition, on the corrosion of a number of commonly used metallic materials of construction.This study, which is fully described in a recent paper (6_), is being conducted at field sites where continuous air This chapter not subject to U.S.

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