Two common antihistamine drugs as high-efficiency corrosion inhibitors for copper in 0.5M H2SO4

Experiments and theoretical calculations to explore the potential of anti-corrosion performance corresponding dioxopromethaxine hydrochloride(DPZ) and promethazine hydrochloride(PZ) for copper in 0.5 M H2SO4 solution. The electrochemical test results and topography information indicated that corrosion inhibition ability of PZ outshines DPZ, the suppression efficiency was high to 96.98% and 93.43%, respectively. The results indicated that two corrosion inhibitor adsorption models follow the Langmuir. Combing XPS and FTIR confirmed that the DPZ and PZ can adsorp on the copper surface. The molecular dynamics simulation(MD) calculation based on DFT theory verifies the DPZ and PZ successful adsorptionon Cu(1 1 1) surface. (c) 2021 Taiwan Institute of Chemical Engineers. Published by Elsevier B.V. All rights reserved.

Automated summary

Experiments and theoretical calculations were conducted to explore the anti-corrosion potential of dioxopromethaxine hydrochloride (DPZ) and promethazine hydrochloride (PZ) for copper in 0.5 M H2SO4 solution. The results showed that PZ exhibited higher corrosion inhibition ability compared to DPZ, with suppression efficiencies of 96.98% and 93.43% respectively. Both corrosion inhibitors were found to follow the Langmuir adsorption model, and XPS and FTIR analysis confirmed their adsorption on the copper surface.