This image shows concrete pouring onsite

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Overall, concrete is a great host for rebar—its high alkalinity means the steel reinforcing bars are passivated by an iron oxide film (i.e. Fe2O3) providing a protective layer against corrosion. However, while hardening, concrete develops minute pores, which allow potential ingress of corrosive agents that damage this layer. Without the passive film protecting the steel, corrosion occurs at a much faster rate.

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An area’s climate also has a great influence on corrosion rate. For example, the whatsapp number database Gulf Coast has an extremely aggressive environment, characterized by high ambient temperature and humidity, severe ground salinity with high levels of chlorides, and sulphates in the groundwater. Other factors include poor quality of construction materials—particularly aggregates—and the presence of high concentrations of sulphate salts in the service environment. (For more, consult Sam Mathew’s Concrete Corrosion: Methods to Control this Perennial Problem in the Middle East.)