Corrosion and protection of galvanized steel in vegetation‐growing concrete in marine environment (I): Corrosion performance

Abstract

Galvanized steel has excellent corrosion resistance in atmospheric and soil corrosive environments, because a dense and passive zinc oxide film, formed on the surface could effectively inhibit the corrosion of the Fe substrate. The galvanized steel wire has been widely embedded in vegetation‐growing concrete for reinforcement and showed good corrosion resistance and strengthening performance. However, in the marine area, the corrosion rate of galvanized steel is accelerated, and the galvanized steel wire will be failed in vegetation‐growing concrete in a short time. This study has been carried out with a view to analyze the corrosion performance and corrosion mechanism of galvanized steel wire embedded in vegetation‐growing concrete in the marine environment. EIS and Tafel curves were employed to study the corrosion performance of galvanized steel under different chloride concentrations and temperatures in vegetation‐growing concrete lixivium. Results showed that the corrosion rate of galvanized steel increased with the increase of chloride concentration and the temperature in vegetation‐growing concrete lixivium.