1-Benzyl-3-phenyl-2-thiourea (BPTU) is a thiourea derivative that contains benzene rings and polar groups. Its inhibition efficiency is related to the polar functions, acting as active centers for the adsorption. In addition, the presence of multiple benzene rings may increase the molecular coverage density. Therefore, BPTU is expected to become a potential corrosion inhibitor. The results showed that BPTU with a concentration of 2 × 10?4 M and at the temperature of 30°C could protect the steel surface with the highest inhibition efficiency of 94.99% and 94.30%. High temperature decreased BPTU’s ability to inhibit steel corrosion[1].
