Material Corrosion Investigations for Urea SCR Diesel Exhaust Systems Tenneco, Incorporated

Format:

Conference/Event

Author/Creator:

Floyd, Ryan, author.

Conference Name:

SAE 2009 Commercial Vehicle Engineering Congress & Exhibition (2009-10-06 : Rosemont, Illinois, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2009

Summary:

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

Notes:

Vendor supplied data

Publisher Number:

2009-01-2883

Access Restriction:

Restricted for use by site license