Using Lignin and Tannin as Green Corrosion Inhibitors for Carbon Steel Petrolum Tanks Abbas Hasan Faris, Amel Muhson Najib, Khaled J. Hamid, Raad Hameed Yousif and Mohamad Nasir Mohamad Ibrahim BIO Web Conf., 97 (2024) 00026 Published online: 05 April 2024 DOI: 10.1051/bioconf/20249700026