Dual-function of N-substituted tetrabromophthalic inhibitors for eco-friendly control of microbiologically influenced corrosion in industrial cooling systems
K Vignesh, Sankar Sujithra, Vajjiravel Murugesan, Ramanathan Duraimurugan, Jayaraman Narenkumar, Sandhanasamy Devanesan, Mohammad Ahmad Wadaan, Rajaram Rajamohan, Aruliah Rajasekar, Tabarak Malik
Abstract
The microbiologically influenced corrosion (MIC) of mild steel 1010 caused by Vibrio injensis VS1, which was isolated from the industrial cooling tower system (CTS). The dual anticorrosion and biocidal properties of synthesized three molecules of N-substituted tetrabromophthalic inhibitors (N-TBI) were evaluated against corrosion and MIC. Among them, the 4,5,6,7 -tetrabromo-2- octylisoindoline-1,3-dione (TOID) exhibited the superior performance against the corrosion and inhibition of MIC. The i corr was decreased by 95% and 90% under abiotic and biotic conditions, respectively. Further the increasing of R ct 1972.4 Ω cm 2 and 1157.9 Ω cm 2 in abiotic and biotic conditions. The synergistic effects of TOID adsorption on metal surface, suppressed the iron oxide layer formation and bacterial colonization as confirmed by Fourier Transform Infrared Spectroscopy (FTIR) and X-ray Diffraction (XRD). This study highlights the potential of N-TBIs for environmentally friendly MIC control in CTS.