Full-scale trails of ten paint systems applied on the plate girders of the Loudwater Viaduct are described. A general conclusion is that aluminum pigment should be excluded from conventional micaceous iron oxide paints. In several instances aluminum has been leached out as aluminum salts leading to deterioration of the paint system and rusting of the substrate. The best performance after four years of exposure is given by a solventless epoxy system, but its application requirements were stringent and may be difficult to meet in practice. For high corrosivity sites, a chlorinated rubber paint system should give a good performance with easy application, although transportation damage between fabrication shop and site may be a problem. The importance of the micro-climate to which sheltered bridge steel work is exposed is discussed. Steel girders are not washed by rain and the combination of corrosive contaminants and long periods of wetness can be a particularly severe condition for paint coatings under a bridge deck. Further research on the characterization of bridge sites and evaluation of priming paints has been initiated. /AUTHOR/

  • Corporate Authors:

    Transport and Road Research Laboratory (TRRL)

    Wokingham, Berkshire  United Kingdom 
  • Authors:
    • BISHOP, R R
  • Publication Date: 1973


  • English

Media Info

  • Features: Photos; References;
  • Pagination: 27 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00083317
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Report/Paper Numbers: R&D Rept.
  • Files: ITRD, TRIS
  • Created Date: May 29 1975 12:00AM