LABORATORY STUDY ON THE EFFECT OF SULFATE IONS ON REBAR CORROSION

This paper presents the findings of a laboratory investigation in which the role of sulfate ions on reinforcing steel corrosion has been investigated. 1020 carbon steel specimens were immersed in saturated ca(oh)2 solutions containing different concentrations of sulfate ions and the corrosion rate was determined by linear polarization resistance and ac impedance techniques. The tests were carried out at 22 degrees c and 50 degrees c. The test results indicate that in the presence of sulfate ions and at 22 degrees c, active corrosion results from modification of the protective passive film to a sulfate film which is less protective than that of the original iron oxide film. Moreover, the combined effect of sulfate ions and elevated temperature results in a seven fold increase in corrosion rate compared to that of the well known chloride ions at normal temperature. (a)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00088846
• Authors:
  • Al-Tayyib, A J
  • Somuah, S K
  • Boah, J K
  • Leblanc, P
  • Al-mana, A L
• Publication Date: 1988-9

Language

• English

Media Info

• Pagination: p. 774-82
• Serial:
  • Cement and Concrete Research
  • Volume: 18
  • Issue Number: 5
  • Publisher: Elsevier
  • ISSN: 0008-8846
  • Serial URL: http://www.sciencedirect.com/science/journal/00088846

Subject/Index Terms

• TRT Terms: Concrete; Corrosion; Material reinforcement; Reinforced concrete; Reinforcing materials; Steel; Sulfates
• ITRD Terms: 4755: Concrete; 5252: Corrosion; 4794: Reinforced concrete; 3471: Reinforcement (in mater); 4542: Steel; 7310: Sulphate
• Subject Areas: Construction;

Filing Info

• Accession Number: 00483387
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Files: ITRD, TRIS
• Created Date: May 31 1989 12:00AM