Iron-based alloys with corrosion resistance to oxygen-sulfur mix

Details Iron-based alloys with corrosion resistance to oxygen-sulfur mix Iron-based alloys with corrosion resistance to oxygen-sulfur mix

1990-03-01

1992-11-17

Dean, R.

Stock material or miscellaneous articles

All metal or with adjacent metals

Composite; i.e., plural, adjacent, spatially distinct metal...

420 54, 4205841, 428610, 428661, 428662, 428941, B32B 1500, C22C 3848

Patent

active

051642700

ABSTRACT:
An iron-based alloy with improved performance with exposure to oxygen-sulfur mixed gases with the alloy containing about 9-30 wt. % Cr and a small amount of Nb and/or Zr implanted on the surface of the alloy to diffuse a depth into the surface portion, with the alloy exhibiting corrosion resistance to the corrosive gases without bulk addition of Nb and/or Zr and without heat treatment at temperatures of 1000.degree.-1100.degree. C.

REFERENCES:
patent: 2990293 (1961-06-01), Toulmin, Jr.
patent: 4470848 (1984-09-01), Natesan et al.
Conference Abstract entitled "Role of Alloying Additions in the Early Stage f Oxidation of Fe-Based Alloys", by K. Natesan and J. H. Park, Abstracts for the 118th Annual Meeting of TMS/AIME held Feb. 27-Mar. 2, 1989.
"Role of Alloying Additions in the Oxidation-Sulfidation of Fe-Base Alloys", K. Natesan and J. H. Park, Corrosion and Particle Erosion at High Temperatures, edited by V. Srinivasan and K. Vedula; The Minerals, Metals & Materials Society, 1989, [Proceedings of a Symposium at Las Vegas, Nev., Feb. 27-Mar. 3, 1989].

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