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.

"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 July 23, 2014 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 July 23, 2014).

Share This




More Matter & Energy News

Wednesday, July 23, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Robot Parking Valet Creates Stress-Free Travel

Robot Parking Valet Creates Stress-Free Travel

AP (July 23, 2014) 'Ray' the robotic parking valet at Dusseldorf Airport in Germany lets travelers to avoid the hassle of finding a parking spot before heading to the check-in desk. (July 23) Video provided by AP
Powered by NewsLook.com
Boeing Ups Outlook on 52% Profit Jump

Boeing Ups Outlook on 52% Profit Jump

Reuters - Business Video Online (July 23, 2014) Commercial aircraft deliveries rose seven percent at Boeing, prompting the aerospace company to boost full-year profit guidance- though quarterly revenues missed analyst estimates. Bobbi Rebell reports. Video provided by Reuters
Powered by NewsLook.com
Europe's Car Market on the Rebound?

Europe's Car Market on the Rebound?

Reuters - Business Video Online (July 23, 2014) Daimler kicks off a round of second-quarter earnings results from Europe's top carmakers with a healthy set of numbers - prompting hopes that stronger sales in Europe will counter weakness in emerging markets. Hayley Platt reports. Video provided by Reuters
Powered by NewsLook.com
9/11 Commission Members Warn of Terror "fatigue" Among American Public

9/11 Commission Members Warn of Terror "fatigue" Among American Public

Reuters - US Online Video (July 22, 2014) Ten years after releasing its initial report, members of the 9/11 Commission warn of the "waning sense of urgency" in combating terrorists attacks. Mana Rabiee reports. Video provided by Reuters
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:
from the past week

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