Opto‐Mechanical Hybrid Energy Management System for All‐Weather Continuous Metal Protection and Its Corrosion Resistance Mechanism

Corrosion of metal materials in marine environments threatens the safety and durability of ships, offshore platforms, and coastal infrastructure. Conventional protection strategies often suffer from limited sustainability and poor adaptability under fluctuating marine conditions. Here, a hybrid power‐driven corrosion protection system (PTEG) integrating a photoanode, a triboelectric nanogenerator (TENG), and an electromagnetic generator (EMG) is developed to enable all‐weather cathodic protection. Under light illumination, the system generates a photocurrent density of 0.284 mA cm −2 , shifting the metal potential to − 0.845 V (vs. SCE). Under mechanical excitation alone, the synergistic TENG‐EMG unit delivers regulated DC output through an integrated power management circuit, achieving a protection potential of − 0.885 V (vs. SCE). Notably, only 93 s of wave energy input sustains effective protection for up to 5734 s. This work demonstrates a viable strategy for converting intermittent environmental energy into stable cathodic protection, offering a sustainable solution for corrosion mitigation in complex marine environments.