Mechanism of Corrosion and Microbial Corrosion of 1,3-Dibutyl Thiourea Using the Quantum Chemical Calculations

An investigation of the inhibiting behavior of 1,3-dibutyl thiourea (DBTU) against corrosion and microbiological corrosion on carbon steels in highly salted (3.5% w/w NaCl) environments at ambient temperature and pressure was undertaken. That it works well at low doses for both corrosion and microbiological corrosion was established. The findings of the study show that DBTU inhibits corrosion well and in terms of microbial corrosion, it had a little impact on planktonic bacteria and a minor effect on sessile bacteria. On this compound’s damping effect, we used OCP, PD, and EIS. Afterward, the surface was characterized using quantum chemical computations. This study identified the optimal dose of 50 ppm. The findings indicated that inhibitor adsorption is the main source of inhibition procedure. The findings reveal that the inhibitor’s thin layer protected the carbon steel surface in highly corrosive salt conditions. An average of 95.36% of DBTU was found to have an inhibitory effect at a concentration of 50 parts per million. The connection between DBTU and the carbon steel surface was very strong and remained strong throughout a broad range of temperatures.