PaintSquare.com
Follow us on Twitter Follow us on LinkedIn Like us on Facebook Follow us on Instagram Visit the TPC Store
Search the site

 

Advertisement

PaintSquare


Coatings Industry News

Main News Page


MIT: Self-Healing Metal Oxides Provide Corrosion Protection

Thursday, April 5, 2018

More items for Quality Control
More items from North America

Comment | More

Researchers based out of the Massachusetts Institute of Technology have discovered that a solid oxide protective coating for metals can deform as a liquid would, filling gaps and providing corrosion protection.

According to the research, the thin layer of coating could help prevent leakage of tiny molecules that can penetrate through most materials, such as radioactive tritium that forms inside the cores of nuclear power plants.

Corrosion Protection

Ju Li, a professor of nuclear engineering and science at MIT and senior author of the research paper, said that “we were trying to understand why aluminum oxide and silicon dioxide are special oxides that give excellent corrosion resistance.”

In conducting research, the team used instruments to observe the surface of metals coated with these “special” oxides to monitor what happened when they were exposed to an oxygen environment and placed under stress.

Christine Daniloff/Massachusetts Institute of Technology

Researchers based out of the Massachusetts Institute of Technology have discovered that a solid oxide protective coating for metals can deform as a liquid would, filling gaps and providing corrosion protection.

According to MIT, metals under stress from pressure inside a reactor vessel, exposed to superheated steam, can corrode quickly if not protected properly. A solid protective layer may also lead to cracks that allow the oxygen to penetrate to the bare metal.

“We want an oxide that is liquid-like and crack-resistant,” said team leader Yang Yang.

Aluminum oxide seems to be the solution, as it has the desired liquid-like behavior even at room temperature, granted that its applied in a thin enough coating—about 2 to 3 nanometers thick.

Yang noted that the traditional assumption in regard to the oxide is that it’s brittle and subject to cracking. Up until recently, no one had been able to prove otherwise due to difficulty observing the material under realistic conditions. Thanks to the use of a transmission electron microscope (E-TEM), this was made possible.

“For the first time, we’ve observed this at nearly atomic resolution,” said Li.

The analysis revealed that an aluminum oxide layer, when applied thinly, is almost as deformable as a comparably thin layer of aluminum metal. When aluminum oxide is coated onto a bulk piece of aluminum, the liquid-like flow “keeps the aluminum covered," Li noted.

With the help of the E-TEM, researchers demonstrated that aluminum with an oxide coating could be stretched to more than double its length without cracks opening. Even with the stress, the oxide “forms a very uniform conformal layer that protects the surface, with no grain boundaries or cracks,” said Li.

The material is technically a kind of glass, but it behaves like a liquid and can coat the surface as long as it is applied thinly enough.

Application opportunities for the coating are reportedly wide and varied, given the crack-free surface the coating can provide.

The paper was published in the journal Nano Letters, with the research being partially supported by the National Science Foundation.

   

Tagged categories: Corrosion; Corrosion protection; Quality control; Research and development

Comment Join the Conversation:

Sign in to our community to add your comments.

Advertisements
 
HoldTight Solutions Inc.
 
NO FLASH RUST - NO CONTAMINANTS
 
Our HoldTight®102 salt remover & flash rust
preventer prevents flash
rust by removing surface contaminants. Contact us
for your nearest distributor.
(800) 319.8802 sales@holdtight.com
 

 
Fischer Technology Inc.
 
DUALSCOPE®FMP100 with DataCenter IP
 
Transfer customized inspection plans from PC to FMP100 using step-by-step guidance with prompts and pictures throughout the measurement procedure
 

 
Tarps manufacturing, Inc.
 
QUALITY MADE IN AMERICA —Available near you!
 
CLICK to get a behind-the-scenes look at how Tarps Manufacturing makes the highest-quality tarps right here in the USA — available nationwide.
 

 
SABRE Autonomous Solutions
 
Repeatability
 
The ALPHA1 provides reliable results consistently allowing you to cost your next job with confidence.
 

 
KTA-Tator, Inc. - Corporate Office
 
KTA-TATOR LABORATORY SERVICES
 
• Coating failure analysis
• Independent testing
• Accelerated weathering testing
• Abrasives Testing
• Oil & Gas Material Qualification
• A2LA Certificate #2455.01
Contact: Rob Leggat
at 412-788-1300 x176
 

 
DeFelsko Corporation
 
PosiTector SHD Shore Hardness Durometer
 
PosiTector SHD measures the hardness of non-metallic materials. Features a measurement timer, auto ignore mode and internal memory. Shore A or D available.
 

 
Bullard
 
Bullard Made in the USA
 
 

 
CHLOR*RID International Inc.
 
SOLUTIONS THAT WORK
 
Companies that invest in corrosion control use CHLOR RID products
  • Soluble salt removal liquid
  • Test kits to verify contamination levels
  • Surface passivation to hold the blast
INFO@CHLOR-RID.COM 800.422.3217
 

 
Blastox/The TDJ Group, Inc.
 
Blastox® - One Step Lead Abatement
 
Sandblast additive delivered to jobsite pre-blended to eliminate hazardous abrasive wastes. Why mix, meter or apply at the job-site? Blast with ease and
Let your painters paint!
1(800)-252-7869
 

 
Vector Technologies Ltd.
 
The Original Performance Proven Vacuum Solutions
 
VecLoader® 616 Double Dump, Continuous Vacuum, 170 HP w/ 2,400 CFM & 28” Hg. 33% More Efficient than traditional vacuum systems! Choose Vector for the most powerful and the most reliable trailer mounted vacuums in the industry! Email us at: inquiry@vector-vacuums.com or call us at: 800-832-4010
 

 
 
 

Technology Publishing Co., 1501 Reedsdale Street, Suite 2008, Pittsburgh, PA 15233

TEL 1-412-431-8300  • FAX  1-412-431-5428  •  EMAIL webmaster@paintsquare.com


The Technology Publishing Network

Durability + Design PaintSquare the Journal of Protective Coatings & Linings Paint BidTracker

 
EXPLORE:      JPCL   |   PaintSquare News   |   Interact   |   Buying Guides   |   Webinars   |   Resources   |   Classifieds
REGISTER AND SUBSCRIBE:      Free PaintSquare Registration   |   Subscribe to JPCL   |   Subscribe to PaintSquare News
MORE:      About PaintSquare.com   |   Privacy Policy   |   Terms & Conditions   |   Support   |   Site Map   |   Search   |   Contact Us