Effect of Sulfate Concentration and Associated Cation Type on Chloride-Induced Reinforcement Corrosion

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Title: Effect of Sulfate Concentration and Associated Cation Type on Chloride-Induced Reinforcement Corrosion

Author(s): H. A. F. Dehwah, M. Maslehuddin, and S. A. Austin

Publication: Special Publication

Volume: 192

Issue:

Appears on pages(s): 369-384

Keywords: concretes; corrosion; reinforcement; sulfates

Date: 4/1/2000

Abstract:
This investigation was conducted to evaluate the effect of sulfate concentration and associated caution type on chloride-induced reinforcement corrosion. Reinforced concrete specimens were exposed to chloride-sulfate environments for a period of 600 days and reinforcement corrosion was evaluated by measuring corrosion potentials and corrosion current density. The corrosion current density increased with increasing sulfate concentration and the action type associated with the sulfate ions significantly influenced chloride-induced reinforcement corrosion. Reinforcement corrosion in the concrete specimens exposed to sodium chloride plus magnesium sulfate solution was more than that in the concrete specimens exposed to sodium chloride plus sodium sulfate solution.