1 23 Reaction Kinetics, Mechanisms and Catalysis ISSN 1878-5190 Volume 129 Number 2 Reac Kinet Mech Cat (2020) 129:1027-1046 DOI 10.1007/s11144-020-01738-3 Sodium sulfite as an oxygen scavenger for the corrosion control of mild steel in petroleum refinery wastewater: optimization, mathematical modeling, surface morphology and reaction kinetics studies Khalid H. Rashid & Anees A. Khadom