PaintSquare.com


The First Word in Protective & Marine Coatings

A Product of Technology Publishing / PaintSquare
JPCL | PaintSquare News | Durability + Design | Paint BidTracker

Resource Guide Extreme Temperatures

Paint and Coatings Industry News

Main News Page


Zapping Steel Seen to Halt Corrosion

Thursday, October 13, 2011

More items for Program/Project Management

Comment | More

Pulses, rather than paint, may prove to be the next big thing in protecting structural steel from corrosion.

Researchers at the UK’s University of Hertfordshire have found that applying high-intensity electromagnetic fields (EMF) to steel dramatically increases the material’s resistance to corrosion.

 International Molybdenum Association

 International Molybdenum Association

Researchers say the technique has dramatically increased corrosion resistance in high-strength, low-alloy (HSLA) steels.

Exactly how and why that happens remain the subjects of continuing research—specifically, a new, two-year FP7 Marie Curie International Incoming Fellowship (IIF) project to investigate the effect of EMF on the properties of structural metals. The fellowship carries a €278,680 (about $382,000 US) grant.

Microstructural Effects

“Our previous work has shown that using electromagnetic treatment as a post-processing routine increases corrosion resistance in steel by about 50 percent,” said Dr. Andreas Chrysanthou, founder and leader of the university’s Materials Research Group.

“Now, we need to understand the microstructural effects that take place when the field acts on the steel.”

The results have been replicated in seven previous studies conducted with the school’s Dr. Anatoli Babutskyi, Chrysanthou said. But the researchers still don’t fully understand how the currents affect the electrochemical corrosion mechanism.

One possible factor, they say: Pulsed electric current (PEC) treatment relaxes the mechanical stresses that lead to metal defects and causes “homogenization” of the stress structures, the scientists wrote in research published in 2009 in the journal Strength of Materials.

By manipulating the composition of the material at the microstructure level, the scientists hope to produce a “more uniform structure” that will then reduce corrosion levels, Chrysanthou recently told The Engineer, a UK publication.

2 Techniques, 1 Outcome

The researchers have tested two techniques. One involves passing an electric current through a material; the other, applying an electromagnetic field to a material for two to three minutes. Most of the testing has focused on the first technique, but both have produced the same effect, Chrysanthou says.

Most of the tests have used sheet material ranging 0.8mm to 1.5mm in thickness; one was done on a 10mm-diameter cylindrical bar, The Engineer reported.

Although research shows that the electrical current treatment “substantially affects corrosion of metals,” Chrysanthou has written, the results haven’t always been positive.

The treatment increased corrosion resistance in high-strength, low-alloy (HSLA) steel and in 5182 aluminum alloy (the metal used primarily for the bottoms of soda cans in North America).

However, the same treatment dramatically reduced corrosion resistance in 5754 aluminum alloy, commonly used in Europe in pressure vessels, tanks and boat hulls, the scientists found.

Corrosion’s Cost

Corrosion is a high-stakes issue worldwide, and Europe is no exception, with most EU countries spending 3 to 4 percent of their GDP on corrosion control and remediation, according to Chrysanthou.

Globally, 10 to 30 percent of the annual production of iron is irreversibly lost to corrosion every year, and corrosion accounts for 90% of failures in oil-field pipes, he has written.

“When we have established how exactly this technique works,” he says, “it will be a useful cost-saving tool for the automotive, construction, defense and aerospace industries.”

   

Tagged categories: Aluminum; Corrosion resistance; Research; Steel

Comment from jesse chasteen, (10/14/2011, 5:18 PM)

I am at a loss...How does this differ from Cathodic Protection?


Comment from Tom Schwerdt, (11/3/2011, 11:38 AM)

Jesse, this appears to be a one-time treatment in the shop rather than the ongoing electrical potential imposed by CP


Comment Join the Conversation:

Sign in to our community to add your comments.

SAFE Systems, Inc.
Portable Dust Collectors for Tough Environments

Trailer and skid-mounted models in numerous sizes, powered by electric and/or diesel. Sloped roofs, multiple dust inlets, high static, dampered fans. Lockable power & drive compartments.


Minerals Research & Recovery

HIGH PERFORMANCE ABRASIVES


“Made in the USA!”

Why recycle waste from other countries? Go FASTER, CLEANER, at 1/3 THE COST with MR&R “All-American” Sharpshot®HP!!

WATCH THE VIDEO


Blastrac
HORIZONTAL AND VERTICAL SHOT BLASTING SYSTEMS

The 900VMB is the latest in Vertical Steel Shot Blasters, ideally suited for medium and large- sized vertical steel blast cleaning jobs and applications. It is remote controlled for operator safety, comfort, and productivity. See Video.
1-800-256-3440 www.blastrac.com


Atlantic Design, Inc.
GOING PLACES YOU ONLY DREAM ABOUT!

We custom design.
We sell new & used.
We upgrade.
We retrofit.
We rent.
What are your equipment needs?
Cleverly simple. Clearly ADI. 866.Call.ADI


Simpson Strong-Tie
Repair, Protect & Strengthen

Need a coating? Turn to Fox. We have solutions to repair, protect and strengthen concrete, steel and wood substrates. Call 888-760-0369 or email info@foxind.com


GMA Garnet USA
GMA Garnet™
Natural Abrasives

- Superior cleaning
  performance
- Even Profile
- Low Dust
- Cost-Effective
- Environmentally friendly
- Recyclable up to 5 times
Tel : +1 832 243 9300


ABKaelin, LLC
Quality is our bottom line

Services include:
• Environmental, Health &
  Safety
• Contractor QP Certification
• Quality Assurance Programs
  and Auditing
• SSPC C3/C5 and other
  Training
• Coatings
• Design/Construction
See our website at abkaelin.com or contact us today abkaelin@comcast.com

 
 
 
Technology Publishing

The Technology Publishing Network

The Journal of Protective Coatings & Linings (JPCL) PaintSquare
Durability + Design Paint BidTracker JPCL Europe

 
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
 

© Copyright 2000-2014, Technology Publishing / PaintSquare, All rights reserved
2100 Wharton Street, Suite 310, Pittsburgh PA 15203-1951; Tel 1-412-431-8300; Fax 1-412-431-5428; E-mail webmaster@paintsquare.com