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Scientists patent corrosion-resistant nano-coating for metals
Date:3/25/2009

of ways suited to a particular application. In one embodiment, it starts as a liquid solution that can be sprayed onto the metal, or the metal can be dipped into it. The metal is then subjected to one or more treatment steps, sometimes including heating for a period of time, to trigger cross-linking reactions between the compounds, and simultaneously, to form corrosion-inhibiting metal oxide nanoparticles, such as environmentally benign cerium-based oxides.

"Among the key factors that ensure the maximum corrosion-mitigating performance of these ultrathin coating films are the great water-repellency, the deposition of metal oxide nanoparticles over the metal's surface, and their excellent adhesion to metal. The combination of these factors considerably decreased the corrosion of metals," said Sugama.

The corrosion resistance of these coatings can be comparable, and even superior, to chromium-based coatings, he said. In fact, these new coatings provide even better coverage of metal surfaces than chromium coatings. Sugama added, "This is particularly advantageous when the metal to be coated possesses fine structural detail."

Because the method deposits such a thin coating of material, it is highly economical and efficient.


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Contact: Karen McNulty Walsh
kmcnulty@bnl.gov
631-344-8350
DOE/Brookhaven National Laboratory
Source:Eurekalert

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