The corrosion of metallic materials poses a threat to the safety and reliability of metallic fa-cility and equipment,as well as exacerbating environmental pollution and economic losses.However,the use of sustainable,renewable and economical raw materials to prepare green corrosion inhibitors is still a challenging issue at this stage.Herein,biomass-based carbon dots(CDs)were prepared with lychee leaves as raw material,and their corrosion inhibition performance on Q235 steel in 1 mol/L HCl was as-sessed by means of mass loss measurement,electrochemical impedance spectroscope,and potentiody-namic polarization measurement.Results indicate that the obtained biomass-derived CDs contain numer-ous oxygen and nitrogen functional groups,which enable them to remain stable in 1 mol/L HCl solution and exhibit long-term stable corrosion inhibition performance.
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