Featured Research

from universities, journals, and other organizations

Accelerated corrosion testing of silver provides clues about performance in atmospheric conditions

Date:
December 3, 2013
Source:
NACE International
Summary:
Gaining a deeper understanding of how environments containing humidity and ozone combined with sodium chloride surface contamination and ultraviolet illumination affect the corrosion rate of silver will enable researchers to create new models to better predict real-world atmospheric corrosion rates.

Scanning electron microscope (SEM) images revealed clusters of metallic silver and silver chloride compound.
Credit: Courtesy of Fontana Corrosion Center, Department of Materials Science and Engineering, The Ohio State University, Columbus, Ohio

Small test strips made of silver or other metals, called "coupons," are frequently used to assess and predict the speeds at which metals used in outdoor environments -- pipelines, aircraft, bridges, as well as countless other types of infrastructure and machinery -- will succumb to corrosion.

Related Articles


"Silver is commonly used as a coupon, so it's important to understand what controls its corrosion rate," explains Gerald Frankel, director of the Fontana Corrosion Center, Department of Materials Science and Engineering, The Ohio State University.

In a paper recently published in the journal Corrosion, Frankel and co-author Huang Lin, a graduate research associate at the Fontana Corrosion Center, describe their work delving into accelerated atmospheric corrosion testing of silver in atmospheres containing humidity and ozone, with sodium chloride (salt) surface contamination and ultraviolet (UV) illumination.

By exploring the effects of all of these corrosive parameters on silver coupons in a "home-built" environment chamber, the researchers discovered that ozone, UV, and relative humidity all play significant roles in silver's corrosion rate.

Gaining a deeper understanding of the roles that the individual atmospheric parameters each play in influencing the corrosion rate of metals, such as silver, will enable the development of new models to better predict atmospheric corrosion rates and, ultimately, performance.

"Our work also involved finding appropriate accelerated lab tests to generate corrosion quickly, and then understanding how the performance of these tests might relate to the performance in real-world atmospheric conditions," Frankel notes.

Next, the researchers plan to study other metals that corrode uniformly, such as copper; and metals that corrode in a localized manner, such as aluminum alloys, painted metals, and galvanically coupled dissimilar metals.


Story Source:

The above story is based on materials provided by NACE International. Note: Materials may be edited for content and length.


Journal Reference:

  1. Huang Lin, G. S Frankel. Accelerated Atmospheric Corrosion Testing of Ag. Corrosion, 2013; 130416094255005 DOI: 10.5006/0926

Cite This Page:

NACE International. "Accelerated corrosion testing of silver provides clues about performance in atmospheric conditions." ScienceDaily. ScienceDaily, 3 December 2013. <www.sciencedaily.com/releases/2013/12/131203144335.htm>.
NACE International. (2013, December 3). Accelerated corrosion testing of silver provides clues about performance in atmospheric conditions. ScienceDaily. Retrieved April 1, 2015 from www.sciencedaily.com/releases/2013/12/131203144335.htm
NACE International. "Accelerated corrosion testing of silver provides clues about performance in atmospheric conditions." ScienceDaily. www.sciencedaily.com/releases/2013/12/131203144335.htm (accessed April 1, 2015).

Share This


More From ScienceDaily



More Matter & Energy News

Wednesday, April 1, 2015

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

7-Year-Old Girl Gets 3-D Printed 'robohand'

7-Year-Old Girl Gets 3-D Printed 'robohand'

AP (Mar. 31, 2015) Although she never had much interest in prosthetic limbs before, Faith Lennox couldn&apos;t wait to slip on her new robohand. The 7-year-old, who lost part of her left arm when she was a baby, grabbed it as soon as it came off a 3-D printer. (March 31) Video provided by AP
Powered by NewsLook.com
Dutch Architects Show Off 3D House-Building Prowess

Dutch Architects Show Off 3D House-Building Prowess

Reuters - Innovations Video Online (Mar. 31, 2015) Dutch architects are constructing a 3D-printed canal-side home, which they hope will spark an environmental revolution in the house-building industry. Jim Drury reports. Video provided by Reuters
Powered by NewsLook.com
Solar Plane Stops in China

Solar Plane Stops in China

Reuters - News Video Online (Mar. 31, 2015) Solar Impulse 2 stops over in China&apos;s Chonqing, completing the fifth leg in its bid to become the first solar powered plane to travel around the globe. Rough Cut (no reporter narration). Video provided by Reuters
Powered by NewsLook.com
Solar Impulse Lands in China After 20-Hour Flight from Myanmar

Solar Impulse Lands in China After 20-Hour Flight from Myanmar

AFP (Mar. 31, 2015) Solar Impulse 2 lands in China, the world&apos;s biggest carbon emitter, completing the fifth leg of its landmark global circumnavigation powered solely by the sun. Duration: 00:55 Video provided by AFP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Space & Time

Matter & Energy

Computers & Math

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins