Free Newsletter
Register for our Free Newsletters
Newsletter
Zones
Advanced Composites
LeftNav
Aerospace
LeftNav
Amorphous Metal Structures
LeftNav
Analysis and Simulation
LeftNav
Asbestos and Substitutes
LeftNav
Associations, Research Organisations and Universities
LeftNav
Automation Equipment
LeftNav
Automotive
LeftNav
Biomaterials
LeftNav
Building Materials
LeftNav
Bulk Handling and Storage
LeftNav
CFCs and Substitutes
LeftNav
Company
LeftNav
Components
LeftNav
Consultancy
LeftNav
View All
Other Carouselweb publications
Carousel Web
Defense File
New Materials
Pro Health Zone
Pro Manufacturing Zone
Pro Security Zone
Web Lec
Pro Engineering Zone
 
 
 
News

Invisible graphene barrier wards off copper corrosion

Rice University : 27 September, 2012  (Technical Article)
An invisible coating has been shown to make copper nearly 100 times more resistant to corrosion, creating tremendous potential for metal protection, even in harsh environments.

In a paper published in the September issue of Carbon, researchers from Monash University and Rice University in the USA say their findings could mean fundamental changes in the development of anti-corrosion coatings using extremely thin graphene films.

Graphene, a microscopically thin layer of carbon atoms, is already in use in smartphone screens, and is attracting research attention for its possibilities as a means of increasing metal’s resistance to corrosion.

“We have obtained one of the best improvements that have been reported so far,” said study co-author Dr Mainak Majumder. “At this point we are almost 100 times better than untreated copper. Other people are maybe five or six times better, so it’s a pretty big jump.”

Dr Parama Banerjee, who performed most of the experiments for this study, said graphene had excellent mechanical properties and great strength. The polymer coatings that are often used on metals can be scratched, compromising their protective ability, but the invisible layer of graphene - although it changes neither the feel nor the appearance of the metal - is much harder to damage.

The researchers applied the graphene to copper at temperatures between 800 and 900 degrees, using a technique known as chemical vapour deposition, and tested it in saline water. “In nations like Australia, where we are surrounded by ocean, it is particularly significant that such an atomically thin coating can provide protection in that environment,” Banerjee said.

Initial experiments were confined to copper, but Banerjee says research is already under way on using the same technique with other metals. This would open up uses for a huge range of applications, from ocean-going vessels to electronics: anywhere that metal is used and at risk of corrosion.

The process is still in the laboratory-testing stage, but Majumder says the group is not only looking at different metals, but also investigating ways of applying the coating at lower temperatures, which would simplify production and enhance market potential.

Bookmark and Share
 
Home I Editor's Blog I News by Zone I News by Date I News by Category I Special Reports I Directory I Events I Advertise I Submit Your News I About Us I Guides
 
   © 2012 NewMaterials.com
Netgains Logo