Abstract
The influence of phytate ions (IP6) on the corrosion resistance of carbon steel with and without passive films in simulated concrete pore solutions with chloride ions was investigated using various electrochemical measurements and surface characterization techniques. The results show that IP6 can effectively improve the corrosion resistance of the bare carbon steel. However, IP6 is confirmed to be detrimental to the naturally formed passive films, thus decreasing the corrosion resistance of the pre-passivated carbon steel. Moreover, owing to the synergistic degradation effects of IP6 and chloride ions, the more pronounced pitting corrosion is highlighted for the pre-passivated carbon steel.
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