engleski

Pitting factor in use of galvanostatic pulse method for measuring the corrosion rate of reinforcement in concrete

Corrosion of steel reinforcement in concrete is the most common cause of deterioration of reinforced concrete structures which ultimately leads to structural failure. Maintenance and repair of concrete structures exposed to corrosion of reinforcement causes high costs worldwide. The simplest and at the same time practical mathematical model of corrosion degradation of reinforced concrete structures is to determine the remaining diameter of reinforcing bars based on the depth of corrosion penetration. The real depth of corrosion penetration differs from the corrosion depth that can be determined from the measured corrosion rates. To establish a relationship between the corrosion depths determined from measured corrosion rates and real depths of corrosion penetration, it is necessary to determ ine the socalled pitting factor. This paper will present the values of pitting factors for hot rolled and cold worked steel reinforcement bars embedded in concrete beam and slab specimens, using the galvanostatic pulse method and GalvaPulse measuring equipment.

STEEL RENFORCEMENT CORROSION, CORROSION RATE, PITTING FACTOR

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