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ABSTRACT
This study employed metronidazole skeletons based on the target branched molecules (TBMs) for achieving efficient anti-corrosion of mild steel in HCl solution. In contrast, the reference linear molecules (RLMs) carrying a single metronidazole framework were also made. The excellent corrosion resistance performance of the target dendrimers for mild steel electrodes in HCl solution was demonstrated. It is shown that the TBMs displayed a superior anti-corrosion effect for mild steel over RLMs in HCl medium at 298 K (at 0.15 mol/L, TBM1, 97.70% versus RLM1, 90.89%). It is shown that the standard Gibbs free energy changes of the adsorption of the TBMs on mild steel surface are below −33 kJ/mol (TBM1, −34.58 kJ/mol), thus an enhanced adsorption film was formed.
Acknowledgements
We shall express our appreciation to the National Natural Science Foundation of China for financial supporting (# 21376282, 21676035, 21878029). We also appreciate financial supporting by the Chongqing Science and Technology Commission (# 2022NSCQ-MSX1298). Y.-T S. thanks Graduate Student Research Innovation Project, Chongqing University (CYB18046). The authors thank the warm help from Analytical and Testing Center of Chongqing University.
Disclosure statement
No potential conflict of interest was reported by the authors.