<p>With the rapid development of urban rail transit, the corrosion of buried metallic structures caused by dynamic DC stray current from metro systems has become increasingly prominent. The corrosion behavior of ribbon zinc anodes – commonly used as sacrificial anodes or in drainage ground beds – under dynamic stray current conditions remains unclear. This study aims to elucidate the corrosion mechanisms of ribbon zinc anodes under dynamic DC stray current interference, clarify the influence of the dynamic period on their corrosion behavior, and establish a corrosion prediction model and service life calculation formula based on weight loss data. The research outcomes are expected to provide a theoretical basis and data support for selecting sacrificial anode materials, optimizing cathodic protection parameters, and designing drainage measures in environments affected by dynamic stray current, such as metro systems. Through square-wave polarization simulation tests conducted in a simulated soil solution under various dynamic periods, the corrosion rate, morphology, product composition, and potential behavior of the zinc anode were analyzed. The results indicate that at a current density of ±100 A/m², the corrosion rate of the zinc anode increases with the dynamic period, rising from 45.98 to 78.21 mm/a. The main corrosion product was identified as ZnO, with Zn(OH)₂ forming at shorter dynamic periods. Observations of corrosion morphology revealed that pitting corrosion intensifies as the dynamic period lengthens. Based on weight loss data, a predictive model for corrosion weight loss was developed, and a service life calculation formula for the ribbon zinc anode under stray current interference was further derived.</p>