Nanotechnology Now

Our NanoNews Digest Sponsors

Heifer International

Wikipedia Affiliate Button

Home > Press > Scientists Patent Corrosion-Resistant Nano-Coating for Metals

Aluminum fins from a geothermal power plant subjected to 24,000 wet/dry cycles of exposure to briny conditions. The far left fin, with no protective coating, completely dissolved. The middle fin had a nano coating with a low level of cerium oxide, while the far right fin had a coating with a higher concentration of cerium oxide nanoparticles.
Aluminum fins from a geothermal power plant subjected to 24,000 wet/dry cycles of exposure to briny conditions. The far left fin, with no protective coating, completely dissolved. The middle fin had a nano coating with a low level of cerium oxide, while the far right fin had a coating with a higher concentration of cerium oxide nanoparticles.

Abstract:
Thinner, less toxic than existing coatings; efficient and economical to produce

Scientists Patent Corrosion-Resistant Nano-Coating for Metals

Upton, NY | Posted on March 25th, 2009

Scientists at the U.S. Department of Energy's Brookhaven National Laboratory have developed a method for coating metal surfaces with an ultrathin film containing nanoparticles - particles measuring billionths of a meter - which renders the metal resistant to corrosion and eliminates the use of toxic chromium for this purpose. The scientists have been awarded U.S. Patent number 7,507,480 for their method and the corrosion-resistant metals made from it. The technology is available for licensing.

"Our coating is produced right on the metal using a simple two- or three-step process to produce a thin film structure by crosslinking among the component compounds," said chemist Toshifumi Sugama, a guest researcher at Brookhaven Lab. "The result is a layer less than 10 nanometers thick that protects the metal from corrosion, even in briny conditions."

Corrosion resistance is essential for metals used in a wide range of applications, from electronics to aviation to power plants. Traditionally, compounds containing a toxic form of chromium have provided the best corrosion resistance. Scientists looking to develop chromium-free alternatives have been unable to achieve the thin layers desirable for many applications. "Ultrathin coatings reduce the amount of material needed to provide corrosion resistance, thereby reducing the cost," Sugama explained.

Sugama's approach achieves several goals - low toxicity and excellent corrosion resistance in a film measuring less than 10 nanometers that can be applied to a wide array of metals, including aluminum, steel, nickel, zinc, copper, bronze, and brass. According to Sugama, the coating should be of specific interest to industries that produce coated valves, pumps, and other components, as well as the manufacturers of aluminum fins used in air-cooled condensers at geothermal power plants, where preventing brine-induced corrosion is a high priority.

The coating can be made in a variety 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.

For information about licensing this technology, contact Brookhaven Lab Licensing Associate Poornima Upadhya, (631)-344-4711,

This research was funded by DOE's Office of Energy Efficiency and Renewable Energy.

####

About Brookhaven National Laboratory
One of ten national laboratories overseen and primarily funded by the Office of Science of the U.S. Department of Energy (DOE), Brookhaven National Laboratory conducts research in the physical, biomedical, and environmental sciences, as well as in energy technologies and national security. Brookhaven Lab also builds and operates major scientific facilities available to university, industry and government researchers. Brookhaven is operated and managed for DOE's Office of Science by Brookhaven Science Associates, a limited-liability company founded by the Research Foundation of State University of New York on behalf of Stony Brook University, the largest academic user of Laboratory facilities, and Battelle, a nonprofit, applied science and technology organization.

Contacts:
Karen McNulty Walsh

(631) 344-8350

Mona Rowe

(631) 344-5056

Copyright © Brookhaven National Laboratory

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related News Press

News and information

Sirrus's Issued Patent Portfolio Continues To Accelerate July 18th, 2018

FEFU scientists reported on toxicity of carbon and silicon nanotubes and carbon nanofibers: Nanoparticles with a wide range of applying, including medicine, damage cells of microalgae Heterosigma akashivo badly. July 18th, 2018

In borophene, boundaries are no barrier: Rice U., Northwestern researchers make and test atom-thick boron's unique domains July 17th, 2018

Tuning into quantum: Scientists unlock signal frequency control of precision atom qubits July 16th, 2018

Thin films

New optical sensor can determine if molecules are left or right 'handed' June 13th, 2018

Organic solar cells reach record efficiency, benchmark for commercialization April 23rd, 2018

High efficiency solar power conversion allowed by a novel composite material: A composite thin film developed at INRS improves significantly solar cells' power conversion efficiency April 10th, 2018

Researchers develop nanoparticle films for high-density data storage: April 3rd, 2018

Products

NEI Corporation introduces UV-Protect Technology to NANOMYTE® Coating Line April 9th, 2018

STMicroelectronics Peps Up Booming Social-Fitness Scene with Smart Motion Sensors for Better Accuracy, Longer Battery Life, and Faster Time to Market January 2nd, 2017

Cutting-edge nanotechnologies are breaking into industries November 18th, 2016

STMicroelectronics’ Semiconductor Chips Contribute to Connected Toothbrush from Oral-B That Sees What You Don’t: Microcontroller and Accelerometer help brushers clean their teeth more effectively October 4th, 2016

Materials/Metamaterials

In borophene, boundaries are no barrier: Rice U., Northwestern researchers make and test atom-thick boron's unique domains July 17th, 2018

Barium ruthenate: A high-yield, easy-to-handle perovskite catalyst for the oxidation of sulfides July 13th, 2018

Carbon is the new black: Researchers use carbon nanotubes to develop clothing that can double as batteries July 10th, 2018

High-power electronics keep their cool with new heat-conducting crystals July 6th, 2018

Announcements

Sirrus's Issued Patent Portfolio Continues To Accelerate July 18th, 2018

FEFU scientists reported on toxicity of carbon and silicon nanotubes and carbon nanofibers: Nanoparticles with a wide range of applying, including medicine, damage cells of microalgae Heterosigma akashivo badly. July 18th, 2018

In borophene, boundaries are no barrier: Rice U., Northwestern researchers make and test atom-thick boron's unique domains July 17th, 2018

Tuning into quantum: Scientists unlock signal frequency control of precision atom qubits July 16th, 2018

Patents/IP/Tech Transfer/Licensing

Sirrus's Issued Patent Portfolio Continues To Accelerate July 18th, 2018

Changing the grocery game: Manufacturing process provides low-cost, sustainable option for food packaging June 26th, 2018

Tunable diamond string may hold key to quantum memory: A process similar to guitar tuning improves storage time of quantum memory May 24th, 2018

Self-assembling 3D battery would charge in seconds May 22nd, 2018

Environment

FEFU scientists reported on toxicity of carbon and silicon nanotubes and carbon nanofibers: Nanoparticles with a wide range of applying, including medicine, damage cells of microalgae Heterosigma akashivo badly. July 18th, 2018

Nanomaterials could mean more algae outbreaks for wetlands, waterways: High tech metal particles may inadvertently take a toll on aquatic life June 26th, 2018

Squeezing light at the nanoscale: Ultra-confined light could detect harmful molecules June 17th, 2018

A nanotech sensor that turns molecular fingerprints into bar codes June 7th, 2018

NanoNews-Digest
The latest news from around the world, FREE



  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More











ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project