Performance of Juglone as a Natural Extract for Inhibiting SRB-Induced Corrosion of Q235 Steel in Seawater
Ke Wang·Zhenhua Yu·Hailong Zhang·Xinru Ge·MATHIVANAN KRISHNAMURTHY·Ruiyong Zhang·Xinyi Zeng·Jie Zhang
Juglone (5-hydroxy-1,4-naphthalenedione), a natural compound derived from walnut husks, was investigated as a sustainable dual-function antibacterial agent and corrosion inhibitor for Q235 steel in sulfate-reducing bacteria (SRB)-containing seawater. Juglone was synthesized via an improved one-pot method, and its performance was evaluated through antibacterial assays, weight loss measurements, surface characterization (SEM, XPS, XRD), and electrochemical techniques (EIS, PDP). Juglone exhibited