Amar Linoy, Mondal Rajarshi, Blumen Omer, Rekanati Lihi, Berg Iris, Harpaz Sara, Sharon Daniel, Gross Elad
Institute of Chemistry and the Center for Nanoscience and Nanotechnology, The Hebrew University, Jerusalem, 91904, Israel.
Angew Chem Int Ed Engl. 2025 May;64(19):e202422879. doi: 10.1002/anie.202422879. Epub 2025 Mar 17.
The development of highly stable coatings on iron is essential for mitigating corrosion formation. Herein, it is demonstrated that a self-assembled monolayer of N-Heterocyclic Carbene (NHC) can be electrodeposited on iron foil and function as a binder for a secondary, crosslinked polymer network coating. The dual layer coating, constructed of a monolayer of NHCs and a polymer film, as a primary and a secondary coating, respectively, effectively preventes corrosion formation with a protective efficiency of 99.6 ± 0.2 %, as determined by polarization measurements in 3.5 wt.% NaCl solution. Spectroscopic analysis identified the formation of a chemical interaction between the NHC monolayer and the polymer film. The strong anchoring of NHC to iron along with its chemical interaction with the polymer film induced high stability and durability of the dual-layer coating to effectively protect the coated iron from corrosion formation.
在铁表面形成高度稳定的涂层对于减轻腐蚀的形成至关重要。在此，证明了可以在铁箔上电沉积一层自组装的N-杂环卡宾（NHC）单层，并作为二次交联聚合物网络涂层的粘合剂。由NHC单层和聚合物膜分别作为 primary 和 secondary 涂层构成的双层涂层，通过在3.5 wt.% NaCl溶液中的极化测量确定，其防护效率为99.6 ± 0.2%，有效地防止了腐蚀的形成。光谱分析确定了NHC单层与聚合物膜之间形成了化学相互作用。NHC与铁的强锚固作用及其与聚合物膜的化学相互作用，导致双层涂层具有高稳定性和耐久性，从而有效地保护涂层铁免受腐蚀形成。
