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Abstract
In this study seventy six standard specimens were taken from flanges and webs of three severely corroded steel beams that were recovered from a petrochemical site. The specimens were measured carefully for data on depth of corrosion and corrosion pitting; and also they were subjected to cyclic loads using a servo-hydraulic machine in order to obtain each specimen's fatigue capacity. Because of the irregularities on corroded surfaces, the measured roughness was expressed as maximum roughness, Rmax, mean roughness, Rm, and standard deviation of roughness, Sd. These measurements were found to increase linearly with increase in corrosion depth. It was observed from fatigue tests that there is a reduction in fatigue life of corroded steel specimens with corrosion pitting that are due to the “notch factor” effect. This method can indirectly yield a quantitative relationship between the pitting corrosion and the corresponding remaining fatigue life of a corroded steel structure by simple measuring of the loss in thickness.
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