View article

In petrochemical engineering, a pressing challenge is the corrosion of N80 carbon steel (N80-CS) in strong acidic conditions like 15 wt% HCl, impacting both mechanical integrity and economic viability. Herein, the corrosive behavior of N80-CS in a 15 wt% HCl solution was evaluated with two thiazolidinediones, (Z)− 5-benzylidenethiazolidine-2,4-dione (BT) and 5-(4-fluorobenzylidene) thiazolidine-2,4-dione (FBT). The surface and interface phenomena were evaluated using electrochemical testing, Scanning electron microscope (SEM), atomic force microscopy (AFM), and computational modelling. Electrochemical impedance spectroscopy (EIS) revealed that, at optimum concentrations, the polarization resistance (R_p) manifested a notable increase from an initial 5.51 Ω cm² to 80.46 and 39.64 Ω cm² when BT and FBT were introduced, respectively. This corresponded to inhibition efficiencies of 93% for BT and 86 …