CHLORIDE SENSITIVITY OF THE CORROSION RATE OF ZINC-COATED REINFORCING BARS

This laboratory study was undertaken to determine whether zinc coatings can be relied on for long-term protection of reinforcing bars subject to environments of variable salt concentrations. Hot-dip galvanized reinforcing bars were coupled to bare carbon steel rebars in various concentrations of CaCl2 in saturated Ca(OH)2-distilled water solutions. Galvanic current output was monitored as a function of time and percent CaCl2 for a zinc-steel couple with an anode-cathode area ratio of unity. Current output became stable after 20 days for CaCl2 concentrations less than 1 percent. For concentrations at 1 percent or greater, current fluctuations were cyclical, increasing in magnitude as percent CaCl2 increased. At 4 percent CaCl2, current output rose sharply. (Author)

  • Corporate Authors:

    Army Construction Engineering Research Laboratory

    P.O. Box 4005
    Champaign, IL  USA  61820

    Champaign Ill

    ,    
  • Authors:
    • Hahin, C
    • Cato, S
    • Mattheessen, W
  • Publication Date: 1976-9

Media Info

  • Pagination: 31 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00146032
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: CERL-IR-M-191 Intrm Rpt.
  • Files: TRIS
  • Created Date: Jan 16 1977 12:00AM