Effect of corrosion-inhibitor-added deicing salts and salt substitutes on reinforcing steels: I. Influence of concentration

✍ Scribed by J.-W. Jang; I. Iwasaki; H.J. Gillis; P.W. Weiblen

• Publisher: Elsevier Science
• Year: 1995
• Tongue: English
• Weight: 769 KB
• Volume: 2
• Category: Article
• ISSN: 1065-7355
• DOI: 10.1016/1065-7355(95)90015-2

✦ Synopsis

Corrosion of reinforcing steel (rebar) samples was investigated in concrete-saturated solutions containing corrosion-inhibitor-added deicing salts and salt substitutes as well as in plain sodium chloride solutions. Galvanic cells were used to determine the effects of corrosion-inhibitor-added deicing salts and salt substitutes on rebar corrosion. The reinforcing steel samples were galvanically coupled and were recovered after 240 days. Pit depths and area percentages of corrosion were determined on the reinforcing steels with an optical microscope. Optimum concentrations were found to exist for the corrosion-inhibitor-added deicing salts and salt substitutes in reducing the rebar corrosion. Dramatic changes of pH values were noted in the concrete-saturated solutions containing corrosioninhibitor-added deicing salts and salt substitutes. The formation of precipitates caused by chemical reactions between a concretesaturated solution and corrosion-inhibitor-added deicing salts and salt substitutes was observed.