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  United States  61820

  Champaign Ill

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

Media Info

• Pagination: 31 p.

Subject/Index Terms

• TRT Terms: Chlorides; Corrosion protection; Fracture mechanics; Galvanizing; Life expectancy; Protective coatings; Reinforced concrete; Reinforcing materials; Salts; Sensitivity; Steel; Test procedures; Zinc; Zinc coatings
• Old TRIS Terms: Hot dip galvanizing
• Subject Areas: Geotechnology; Highways; Materials; Society;

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