ACCELERATED PERFORMANCE TESTING OF BRIDGE PAINTS FOR SEACOAST ENVIRONMENTS

The design and operation are described of an accelerated-corrosion-environment chamber for evaluation of metal protective paints. The findings are discussed of experiments designed to test the reproducibility of the results obtained in the chamber and are correlated with the limited available data from an exterior weathering test fence at a tidal estuary in Brunswick, Georgia. The fundamental premise underlying the design of the chamber is that the primary stresses that account for paint-system failures on structural steel in seacoast environments are caused by continuing cycles of wetting and drying and heating and cooling in the presence of the corrosion-stimulating chloride ion. The major conclusions are that the chamber exhibits high precision of test results within runs and an exceptionally close similarity in a greatly accelerated test to the modes of panel failure observed in the field. The prospects for close laboratory-field correlation appear very good but, for general use, this correlation will require control system techniques that have been proposed but not yet validated by comprehensive experimental studies. /Author/

Media Info

  • Media Type: Print
  • Features: Figures; Photos; References; Tables;
  • Pagination: pp 14-23
  • Monograph Title: Adhesive materials, paints, and corrosion
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00300417
  • Record Type: Publication
  • ISBN: 0309028388
  • Files: TRIS, TRB
  • Created Date: Sep 29 1979 12:00AM