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

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.
Inventors:
Issue Date:
OSTI Identifier:
1345380
Assignee:
ATI Properties LLC NETL
Patent Number(s):
9,580,789
Application Number:
13/873,272
Contract Number:
FC26-05NT42513
Resource Relation:
Patent File Date: 2013 Apr 30
Research Org:
ATI Properties LLC, Albany, OR (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Works referenced in this record:

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
journal, November 2007

The Oxidation of Ferritic Stainless Steels in Simulated Solid-Oxide Fuel-Cell Atmospheres
journal, January 2007
  • Hammer, J. E.; Laney, S. J.; Jackson, R. W.
  • Oxidation of Metals, Vol. 67, Issue 1-2, p. 1-38
  • DOI: 10.1007/s11085-006-9041-y

Protective coating on stainless steel interconnect for SOFCs: oxidation kinetics and electrical properties
journal, February 2005
  • Chen, Xuan; Hou, Peggy Y.; Jacobson, Craig P.
  • Solid State Ionics, Vol. 176, Issue 5-6, p. 425-433
  • DOI: 10.1016/j.ssi.2004.10.004