Free Newsletters - Space News - Defense Alert - Environment Report - Energy Monitor
. Space Industry and Business News .




TECH SPACE
Silver corrosion provides clues about performance in atmospheric conditions
by Staff Writers
Houston TX (SPX) Dec 12, 2013


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 CORROSION journal, 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.

The paper, "Accelerated Atmospheric Corrosion Testing of Ag," written by Huang Lin and G.S. Frankel, appears in NACE International's journal, CORROSION, Nov. 2013, Vol. 69, No. 11, pp. 1060-1072.

.


Related Links
NACE International
Space Technology News - Applications and Research






Comment on this article via your Facebook, Yahoo, AOL, Hotmail login.

Share this article via these popular social media networks
del.icio.usdel.icio.us DiggDigg RedditReddit GoogleGoogle




Memory Foam Mattress Review
Newsletters :: SpaceDaily :: SpaceWar :: TerraDaily :: Energy Daily
XML Feeds :: Space News :: Earth News :: War News :: Solar Energy News





TECH SPACE
Citrus fruit inspires a new energy-absorbing metal structure
Heidelberg, Germany (SPX) Dec 12, 2013
It has been said that nature provides us with everything that we need. A new study appearing in Springer's Journal of Materials Science may lend credence to that claim. Researchers from the Foundry Institute of the RWTH Aachen University in Germany, and Plant Biomechanics Group of the University of Freiburg, Germany, have developed an aluminum hybrid that could be used to optimize technica ... read more


TECH SPACE
Citrus fruit inspires a new energy-absorbing metal structure

Intense 2-color double X-ray laser pulses: a powerful tool to study ultrafast processes

Highly insulating windows are very energy efficient, though expensive

Silver corrosion provides clues about performance in atmospheric conditions

TECH SPACE
US Navy Accepts MUOS-2 Satellite, Ground Stations After On-Orbit Testing

Boeing Tests Validate Performance of FAB-T Satellite Communications Program

Intelsat General To Provide Satellite Services To US Marines

Manpack Radios in Arctic Connect with MUOS Satellites Orbiting Equator

TECH SPACE
Kazakhstan to end Proton missions in 2025

Russian Proton-M rocket launches Inmarsat-5F1 satellite

Basic build-up is being completed for Arianespace's Soyuz to launch Gaia

Third time a charm: SpaceX launches commercial satellite

TECH SPACE
'Smart' wig navigates by GPS, monitors brainwaves

CIA, Pentagon trying to hinder construction of GLONASS stations in US

GPS 3 Prototype Communicates With GPS Constellation

Russia to enforce GLONASS Over GPS

TECH SPACE
End looms for US Air Force's 'Warthog' ground-attack jet

Iraq signs $1.1 bn deal to buy S. Korean fighters

India's Tejas fighter passes air-to-air missile firing test

Forecast: Growth ahead in military helicopter market

TECH SPACE
A step closer to composite-based electronics

50 Meters of Optical Fiber Shrunk to the Size of Microchips

Chips meet Tubes: World's First Terahertz Vacuum Amplifier

NIST demonstrates how losing information can benefit quantum computing

TECH SPACE
Juno Gives Starship-Like View Of Earth Flyby

China-Brazil satellite fails to enter orbit

Mysteries of Earth's radiation belts uncovered by NASA twin spacecraft

Mapping the world's largest coral reef

TECH SPACE
US top court examines rules on cross-border air pollution

Chinese newspaper blasts state TV for tribute to smog

Air pollution in Europe kills even at guideline levels

Hong Kong announces new air pollution index




The content herein, unless otherwise known to be public domain, are Copyright 1995-2014 - Space Media Network. AFP, UPI and IANS news wire stories are copyright Agence France-Presse, United Press International and Indo-Asia News Service. ESA Portal Reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. Advertising does not imply endorsement,agreement or approval of any opinions, statements or information provided by Space Media Network on any Web page published or hosted by Space Media Network. Privacy Statement