Method for reducing formation of electrically resistive layer on ferritic stainless steels

Rakowski, James M.

Title: Method for reducing formation of electrically resistive layer on ferritic stainless steels

Patent · Tue Sep 10 00:00:00 EDT 2013

OSTI ID:1092912

Rakowski, James M.

A method of reducing the formation of electrically resistive scale on a an article comprising a silicon-containing ferritic stainless subjected to oxidizing conditions in service includes, prior to placing the article in service, subjecting the article to conditions under which silica, which includes silicon derived from the steel, forms on a surface of the steel. Optionally, at least a portion of the silica is removed from the surface to placing the article in service. A ferritic stainless steel alloy having a reduced tendency to form silica on at least a surface thereof also is provided. The steel includes a near-surface region that has been depleted of silicon relative to a remainder of the steel.

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Research Organization:: National Energy Technology Laboratory (NETL), Pittsburgh, PA, Morgantown, WV (United States)

Sponsoring Organization:: USDOE

DOE Contract Number:: FC26-05NT42513

Assignee:: ATI Properties, Inc. (Albany, OR)

Patent Number(s):: 8,529,709

Application Number:: 12/042,751

OSTI ID:: 1092912

Country of Publication:: United States

Language:: English

References (6)

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The Oxidation of Ferritic Stainless Steels in Simulated Solid-Oxide Fuel-Cell Atmospheres Hammer, J. E.; Laney, S. J.; Jackson, R. W. Oxidation of Metals, Vol. 67, Issue 1-2, p. 1-38 https://doi.org/10.1007/s11085-006-9041-y	journal	January 2007
Production of Ferritic Stainless Steel with Improved Drawing Properties Schneider, Stephen; Hultgren, Frank; Barclay, William https://doi.org/https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/3650848 US Patent Document 3,650,848	patent	March 1972
Effect of minor elements and a Ce surface treatment on the oxidation behavior of an Fe–22Cr–0.5Mn (Crofer 22 APU) ferritic stainless steel Alman, D. E.; Jablonski, P. D. International Journal of Hydrogen Energy, Vol. 32, Issue 16, p. 3743-3753 https://doi.org/10.1016/j.ijhydene.2006.08.032	journal	November 2007
Protective coating on stainless steel interconnect for SOFCs: oxidation kinetics and electrical properties Chen, Xuan; Hou, Peggy Y.; Jacobson, Craig P. Solid State Ionics, Vol. 176, Issue 5-6, p. 425-433 https://doi.org/10.1016/j.ssi.2004.10.004	journal	February 2005
Method for reducing the resistivity of the corrosion-induced oxide layer, and applications Wind, Jorg; Nitschke, Felix https://doi.org/https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/6290790 US Patent Document 6,290,790	patent	September 2001

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