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




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.

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.

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

KTA-Tator, Inc. - Corporate Office
Instrument Service Department
Are you a QP certified contractor? KTA’s Instrument Service Department can help keep you compliant!
Click or call 1-800-KTA-GAGE.

HoldTight Solutions Inc.
Full Surface Protection for Up to One Year
HT 365 is a preservation, single component, anti-corrosive coating, a water displacing agent, a lubricant, and a penetrating fluid. It creates an imperceptible thin-film coating that offers excellent salt contaminant and humidity protection. Contact your HoldTight® representative or visit for more information.

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.

AME/Applied Materials & Engineering, Inc.
Applied Materials & Engineering
Consulting, Forensic Analysis and Testing Services for construction materials including concrete, steel, masonry and wood. Offering Petrographic and FTIR Analysis to identify composition of floor coatings, flashing and sealants, two-part epoxy resins, plastics, paints, colorings, and additives.

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.

Sidewinder/Persyst Enterprises, Inc.
Sidewinder Model M2
Load our Refrigeration Machine Distiller Reclaimer with dirty solvent, press the button, you're done. You will have clean gun wash and cleanup solvents, ready for reuse.

Industrial Vacuum Equipment Corp.
Hurricane Vacuums
& Dust Collectors
Vacuum and dust collector hose, filters and related accessories.

Novatek Corporation
Dustless Coatings Removal
Novatek Corporation, Dustless Coatings Removal Strip, clean and profile all dust free! Comply with new lead standards. Contact today: (866) 563-7800

Innovation without Boundaries
Preferred Applicator for Performance Coatings: Whitford, Dow Corning, Dupont, Sandstrom, Carboline, NIC, PPG, and more. Innovators behind Blackstone and Graphene coatings.


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

TEL 1-412-431-8300  • FAX  1-412-431-5428  •  EMAIL

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   |   Privacy Policy   |   Terms & Conditions   |   Support   |   Site Map   |   Search   |   Contact Us