engleski

Tartrate as corrosion inhibitor in concrete - the pitting corrosion inhibition

Electrochemical measurements performed in a solution simulating concrete pore solution have shown that tartrate postpones pitting corrosion initiation of steel. EIS and capacitance measurements have shown that tartrate affects the electrochemical and semi-conductive properties of passive film. It was postulated that tartrate adsorbs on the passive film surface effectively competing with chloride ions in the pitting initiation process by blocking the surface active sites. ATR FTIR measurements have confirmed the presence of tartrate at the steel surface. The addition of tartrate to mortar was shown to affect the properties of fresh and hardened mortar resulting in increased compressive strength and penetrability resistance of mortar. Electrochemical measurements performed on rebar embedded in mortar and exposed to chloride media have shown significantly higher interfacial resistances of the samples to which the tartrate was admixed. Such behavior may be an indicator of an enhanced corrosion resistance of rebar.

steel; corrosion; inhibition; concrete

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