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


UCSB Team Observes Pitting Corrosion in Real Time

Wednesday, September 20, 2017

Comment | More

Researchers at the University of California Santa Barbara say a new tool they’ve developed allows them to observe crevice and pitting corrosion in real time, helping them to understand when and where the process starts and what factors lead to it spreading quickly.

Corrosion
Images: UC Santa Barbara

The UCSB team's research could have far-ranging consequences in the field of corrosion protection.

The device, developed by chemical engineering professor Jacob Israelachvili and his team, is a type of surface forces apparatus, and it allows the observation of pitting corrosion in confined spaces at the micro and nano scale, something that’s difficult or impossible without the device.

The Study

Israelachvili and a team from both UCSB and Germany’s Max Planck Institut für Eisenforschung used the SFA to study the corrosion process at the interface of a nickel film on a mica surface, upon exposure to different pH-neutral sodium chloride solutions.

“With the SFA, we can accurately determine the thickness of our metal film of interest and follow the development over time as corrosion proceeds,” researcher Kai Kristiansen said.

Jacob Israelachvili

The research team is headed up by Jacob Israelachvili, of UCSB's chemical engineering program.

In their recent research, published in the current issue of Proceedings of the National Academy of Sciences of the United States of America, the team found that corrosion would initiate in very localized areas, most likely areas with tiny cracks or weak spots.

Other Observations

The scientists say their observations suggest “initial corrosion results in formation of an aggressive interfacial electrolyte that rapidly accelerates pitting, similar to crack initiation and propagation within the confined area.”

“One of the most important aspects of our finding is the significance of the electric potential difference between the film of interest and the apposing surface in initiating corrosion,” Kristiansen said. The nickel film, with higher potential energy than the relatively inert mica surface, experienced corrosion in the experiment while the mica did not.

The research into the origins and tendencies of the corrosion process could have wide-ranging implications, from helping to protect metal structures and industrial machinery to maintaining medical devices and even helping to develop new formulas for cement, the researchers say.

   

Tagged categories: Colleges and Universities; Corrosion; Research

Comment from gianni farina, (9/20/2017, 1:22 AM)

where can I get more inmfo onm nthe sub


Comment from Mario Colica, (9/20/2017, 2:55 AM)

We must assume that the pitting is regarding stainless steeel , even it's not clear fwhen reading the article . In order to appreciate the author's work , more info are needed


Comment Join the Conversation:

Sign in to our community to add your comments.

Advertisements
 
Fischer Technology Inc.
 
Highly Repeatable Ultrasonic Wall Thickness Gauge
 
Detect corrosion by monitoring wall thickness with the compact UMP series from Fischer.
 

 
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
 

 
SEMicro Division, M.E. Taylor Engineering, Inc.
 
Coatings Adhesion Testers
 
The PATTI® accurately measures the bond strength between coating & substrate. Outfitted properly, the surface can be rough, porous, or curved & >10K psi strong!
 

 
Safway Services
 
Your Access Advantage. QUIKDECK®
 
Provides safe, factory-floor-like working conditions. Can be engineered to fit almost any shape, structure or size. Modular platform easily assembled from just a few basic components. Excellent containment. Applications include vessels, offshore rigs and bridges.
 

 
Termarust Technologies
 
Termarust (HR CSA) Chemically Stops
Active Corrosion
 
Arch truss treated with Termarust's (HR CSA) in 2003. This steel arch bridge is rust free on all surfaces including the crevice corroded joints and connections.
 

 
Waterjet Technology Association (WJTA)
 
Click to register today!
 
See the latest automated and handheld UHP waterblasting tools/systems/products. Exhibits, live demos, educational sessions, waterjet short course, networking.
 

 
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.
 

 
DeFelsko Corporation
 
PosiTector SST Soluble Salt Tester
 
Measures the concentration of soluble salts on metal surfaces. Use with all Bresle patch types including the reusable, adhesive-free PosiPatch.
 

 
W Abrasives
 
Unrivaled Expertise for your Surface Preparation
 
As the global leader in steel abrasives, W Abrasives material is the efficient and eco-friendly solution blasting with you to reach the perfect profile.
 

 
PPG Protective and Marine Coatings Group
 
We Protect and Beautify the World
 
PPG is widely recognized as a world leader in protective and marine coatings, developing innovative, cutting-edge products and services.
 

 
 
 

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   |   Site Map   |   Search   |   Contact Us