March 31, 2025 – A dual-layer nanocoating system that significantly improves upon existing rust corrosion prevention methods on iron has been developed by Hebrew University of Jerusalem researchers.
As reported in a study in Angewandte Chemie, the coating combines a thin molecular primer with a durable polymer layer, creating a strong, long-lasting barrier against rust that provides 99.6% protection against iron corrosion. This innovation could significantly reduce maintenance costs and extend the lifespan of iron-based materials used in construction, transportation, and manufacturing.
Iron is widely used in industries such as construction, transportation, and manufacturing, but it is highly prone to rust when exposed to air and moisture. Rust weakens the metal, leading to structural damage and costly repairs. While protective coatings exist, many degrade over time, offering limited long-term protection.
“This discovery offers a major leap forward in protecting iron from corrosion,” said Prof. Elad Gross at the Hebrew University NanoCenter and Institute of Chemistry. “By using a specially designed primer, we created a coating that is not only highly effective but also long-lasting. This could reduce maintenance costs, extend the lifespan of iron-based materials, and provide industries with a much more reliable solution.”
The first layer is an ultra-thin coating made of N-Heterocyclic Carbene (NHC) molecules, which form a tight bond with the iron surface. This primer layer ensures that the second layer—a polymer-based coating—sticks firmly, creating a highly stable and durable protective shield. The improved adhesion keeps the coating intact even in harsh conditions, such as prolonged saltwater exposure.
This research was supported by the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation program (Grant Agreement No. 802769, ERC Starting Grant “MapCat”) and by the Israeli Ministry of Energy (project no. 222–11–090) and the Israeli Ministry of Innovation, Science and Technology (project no. 1001817851). L. A. acknowledges the Harvey M. Krueger Family Center for Nanoscience and Nanotechnology for their financial support.
The research paper titled “Self-Assembled Monolayer of N-Heterocyclic Carbene as a Primer in a Dual-Layer Coating for Corrosion Protection on Iron” is now available in Angewandte Chemie and can be accessed here.
Researchers:
Linoy Amar, Rajarshi Mondal, Omer Blumen, Lihi Rekanati, Iris Berg, Sara Harpaz, Daniel Sharon*, and Elad Gross
Institution:
Institute of Chemistry and the Center for Nanoscience and Nanotechnology, The Hebrew University
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