You are being redirected because this document is part of your ASTM Compass® subscription.
    This document is part of your ASTM Compass® subscription.


    Measuring the Rate of Corrosion of Steel in Concrete

    Published: 0

      Format Pages Price  
    PDF (360K) 17 $25   ADD TO CART
    Complete Source PDF (4.3M) 197 $55   ADD TO CART


    A study on the relationship of pH, chloride concentration, and oxygen concentration shows that a drying cycle, which locally concentrates chloride and oxygen, initiates the corrosion of steel in concrete. Once corrosion is initiated, the pH at the anodic areas decreases allowing corrosion to proceed more easily. Oxygen controls the rate of corrosion, but chloride affects the number of sites where corrosion initiates.

    Using a small portable computer system that applied the technique of polarization resistance with current interruption for elimination of iR error, the voltage measurement error generated when current flows through a resistive media, the corrosion of steel in concrete was measured in the laboratory. The portable system was then used to perform preliminary rate of corrosion measurements on reinforcing steel in three bridge decks in Frederick County, Maryland.


    bridge deck deterioration, chloride concentration, corrosion of steel, corrosion rate measurement, effect of pH, iR error, oxygen concentration, polarization resistance, reinforcing steel in concrete, corrosion, steels, concrete

    Author Information:

    Escalante, E
    Metallurgist, National Bureau of Standards, Gaithersburg, MD

    Ito, S
    Research scientist, Nippon Steel Corporation, Kawasaki,

    Committee/Subcommittee: G01.11

    DOI: 10.1520/STP25017S