Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 815, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2019.152338
Keywords
Carbon dots; Corrosion; 1 M HCl; Adsorption film
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Funding
- Program of Qingjiang Excellent Young Talents, Jiangxi University of Science and Technology
- Natural Science Foundation of Jiangxi Province [20181BBE58001]
- Natural Science Foundation of Jiangxi Education Department [GJJ180431]
- Research and Development Project of Ganzhou
- Science and Technology Innovation Talents Program of Ganzhou
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N doped carbon dots (N-CDs) were prepared by hydrothermal method in methacrylic acid and n-butylamine precursors. The inhibition behavior of N-CDs on Q235 steel in hydrochloric acid environment was discussed via weight loss test, surface characterizations and electrochemistry measurements. Results showed that the as-prepared N-CDs could effectively protect Q235 steel and the inhibition efficiency reached up to 94.96% at 200 mg/L of N-CDs. In the meantime, the impedance modulus was greatly enhanced and the corrosion current density was reduced by one order of magnitude after the addition of N-CDs. Moreover, it could adhere to the steel surface by diffusion and agglomeration effect, resulting in the formation of adsorption film on steel surface. The adsorption mechanism of N-CDs almost complied with the Langmuir adsorption model, containing chemical and physical adsorptions. (C) 2019 Elsevier B.V. All rights reserved.
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