Correlation between corrosion level and fatigue strength of high-strength galvanized steel wires

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• By introducing a digital image color analysis system in this study, the white rust unique to zinc and the red rust unique to iron from corroded wires and quantitatively grasp the rust color distribution rate were able to classify. Furthermore, by setting corrosion levels based on rust color distribution ratio, it has become possible to quantitatively categorize the levels. • Additionally, from the quantitatively categorized corrosion levels, it has become possible to comprehend the relationship visually and quantitatively between cross-sectional loss rate and corrosion depth tendency, based on the increase or decrease in the rust rate. • In the specimens obtained from the corrosion levels set in this study, fatigue strength showed results that were equivalent to or higher than those of new wires. The tensile strength also showed similar results. Therefore, it is considered that the corrosion levels (1 and 2) set in this study may not have a significant impact on fatigue strength. However, it should be noted that this may be due to insufficient consideration of variations resulting from the small number of specimens or the possibility that corrosion did not progress sufficiently to affect fatigue strength.

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