<p>Electrified fish guidance racks offer an innovative approach to improve downstream fish migration at hydropower plants by deterring fish from hydropower intakes. Compared to mechanical racks, they allow for larger bar spacings, reducing hydraulic losses and the risk of clogging. While initial field studies have confirmed their effectiveness, severe corrosion has been observed on the positively electrified steel elements. Previous experiments have shown that pulsed AC significantly reduces corrosion. However, a different technical solution is required to achieve full protection. This study investigates the applicability of cathodic protection (CP) to electrified fish guidance systems through controlled laboratory experiments. Steel electrodes with various electrification configurations were tested, and the effects of protective current densities and electrode potentials on corrosion rates were analysed. The results demonstrate that knowledge on stray current interference with AC can also be applied to electrified fish guidance racks. Despite the use of pulsed rather than sinusoidal currents, corrosion did not occur when the currents were compensated within a short time frame. Based on these findings, a cathodic protection module is currently being developed to regulate the protection current without interfering with the system's electrical function.</p>