In 1984, the Ministry of Transportation initiated a research study to quantify the corrosion rates of weathering steel coupons. This report presents the results of long-term outdoor corrosion tests performed on A588 weathering steel in a variety of environments representative of those in which bridges are situated. Data were obtained over a five-year period, from approximately 50 coupons exposed at five separate sites in southern Ontario. The data are compared to findings from other jurisdictions. The coupon corrosion rates were quite variable. Although the corrosion rates varied with time, after 5 years the rates of corrosion ranged from 4.7 micrometers/year in an open exposure to 65.9 micrometers/year in a busy freeway environment. The major factors influencing the corrosion rate were the effect of sheltering and the presence of chlorides.

  • Corporate Authors:

    Ontario Ministry of Transportation

    Research and Development Branch, 1201 Wilson Avenue
    Downsview, Ontario  Canada  M3M 1J8
  • Authors:
    • Pianca, F
  • Publication Date: 1994-3


  • English

Media Info

  • Features: Figures; Tables;
  • Pagination: 12 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00724684
  • Record Type: Publication
  • Report/Paper Numbers: MAT-94-01
  • Files: TRIS
  • Created Date: Aug 29 1996 12:00AM