Material Corrosion Investigations for Urea SCR Diesel Exhaust Systems

Paper #:
  • 2009-01-2883

Published:
  • 2009-10-06
DOI:
  • 10.4271/2009-01-2883
Citation:
Floyd, R., Kotrba, A., Martin, S., and Prodin, K., "Material Corrosion Investigations for Urea SCR Diesel Exhaust Systems," SAE Technical Paper 2009-01-2883, 2009, doi:10.4271/2009-01-2883.
Pages:
8
Abstract:
New emissions standards for oxides of nitrogen (NOx) in on-road diesel vehicles are effective in 2010, and a common approach applies urea selective catalytic reduction (SCR). Urea is injected into the exhaust and decomposes to form ammonia, which chemically reacts with NOx as it passes through an SCR catalyst. Ammonia is corrosive and negatively affects typical stainless steels used in exhaust applications, but these corrosive impacts have not yet been quantified in an exhaust system. Two unique corrosion tests are performed on a number of various stainless steel samples, illustrating such performance concerns with 409, while offering alternatives with much better performance, including cost-effective options. The method applied is described, yielding performance criteria through appearance, weight loss, and corrosion pit depth.
Access
Now
SAE MOBILUS Subscriber? You may already have access.
Buy
Select
Price
List
Download
$27.00
Mail
$27.00
Members save up to 40% off list price.
Share
HTML for Linking to Page
Page URL

Related Items

Article
2016-02-02
Technical Paper / Journal Article
2003-10-27
Book
2009-02-27
Technical Paper / Journal Article
2003-10-27
Training / Education
2013-04-09
Article
2016-02-02