UNPAINTED WEATHERING STEEL BRIDGES: CORROSION MECHANISMS AND MAINTENANCE ALTERNATIVES

The results are presented from a study sponsored by the Federal Highway Administration on corrosion mechanisms in weathering steel and on suitable surface preparation and coating alternatives for bridges built with weathering steel. The corrosion mechanism is explained, and the major contibuting variables, i.e., the operating environment and loaclized exposures to harmful conditions, are discused. The study attempted to develop accelerated weathering cyclic exposures in the laboratory that duplicate operational bridge weathering steel corrosion and pitting. The study also developed techniques to determine the level of surface contaminants present before and after surface preparation. The cleaning effectiveness of field surface preparation methods was evaluated, as well as the performance and the effect of surface preparation methods relevant to the service life of bridge coatings on corroded weathering steel. Interim field maintenance guidelines are presented.

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  • Corporate Authors:

    Technology Publishing Company

    24 S 18th Street
    Pittsburgh, PA  United States  15203
  • Authors:
    • Peart, J W
  • Publication Date: 1991-1

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Filing Info

  • Accession Number: 00603385
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Feb 28 1991 12:00AM