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  • Title: Carbon Dots as Environment-Friendly and Efficient Corrosion Inhibitors for Q235 Steel in 1 M HCl.
    Author: Pan L, Li G, Wang Z, Liu D, Zhu W, Tong C, Zhu R, Hu S.
    Journal: Langmuir; 2021 Dec 14; 37(49):14336-14344. PubMed ID: 34856797.
    Abstract:
    To reduce the corrosion of Q235 steel, environment-friendly and efficient N-doped carbon dots (N-CDs) were synthesized using 4-amino salicylic acid (4-ASA) and l-histidine (l-His) as precursors. The corrosion inhibition behavior of N-CDs for Q235 steel in 1 M HCl solution was systematically investigated using a weight-loss experiment, an electrochemical test, and corrosion morphology. Results showed that N-CDs could effectively inhibit the corrosion of Q235 steel, and the inhibitory efficiency reached 93% at 50 mg L-1. Quantum chemistry and molecular dynamics were used to study the inhibition mechanism of N-CDs. The results demonstrated that N-CDs exhibited a strong adsorption force on metal and the adsorption process followed the Langmuir adsorption isotherm, indicating physical/chemical mixed adsorption.
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