期刊
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
卷 636, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.colsurfa.2021.128058
关键词
Copper; Corrosion inhibitors; Neonicotinoids; EIS; SEM
资金
- Science and Technology Commission of Shanghai Municipality [17DZ2282800, 19DZ2271100]
Two neonicotinoid derivatives, IMT and IMP, have been developed as copper corrosion inhibitors in a NaCl solution, with inhibition efficiencies greater than 97% at 298 K. These compounds can form a protective film on the copper substrate and create a more hydrophobic surface to shield corrosive ions, making them potential alternatives for corrosion inhibitors in harsh industrial seawater systems.
Two neonicotinoid derivatives namely 1-[(2-Chloro-5-thiazolyl)-methyl] 4,5-dihydro-N-nitro-1H-imidazol-2-amine (IMT) and (2E) 1-[(6-Chloro-pyridin-3-yl)-methyl]-N-nitro-imidazolidin-2-imine (IMP), are developed as copper corrosion inhibitors in a NaCl solution for the first time. The inhibition performances of two inhibitors are investigated by electrochemical measurements combined with various detailed spectral characterizations techniques. The results indicate that the maximum inhibition efficiencies of both inhibitors are greater than 97% at 298 K. The two neonicotinoid compounds can fabricate a protective film on the Cu substrate and promote a more hydrophobic surface to shield corrosive ions. Theoretical calculations reveal that IMT and IMP molecules could absorb on the Cu surface through active sites of N-nitro terminal functional groups (-N-NO2), suggesting that neonicotinoid compounds can be a reasonable alternative as corrosion inhibitors for applications in harsh industrial seawater systems.
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