Iron-based alloys with corrosion resistance to oxygen-sulfur mixed gases

Patent Application · Thu Mar 01 00:00:00 EST 1990

OSTI ID:5845717

Natesan, K

The invention is directed to iron-based alloys whose resistance to attack by corrosive gases is improved by surface modification via implantation of Nb or Zr to the surface portion of the alloy. The resulting alloy composition preferably contains chromium with optional levels of nickel and a small content of Nb or Zr principally within the surface portion of the alloy and primarily below the scale at the surface. Protection is achieved without high temperature annealing at 1000--1100{degrees}C. The surface modification may be carried out by techniques to diffuse the additive into the surface portion and preferably is carried out by ion implantation. 2 tabs.

• Research Organization: Argonne National Lab., IL (USA)
• Sponsoring Organization: USDOE; USDOE, Washington, DC (USA)
• DOE Contract Number: W-31109-ENG-38
• Assignee: Dept. of Energy
• Patent Number(s): PATENTS-US-A7486665
• Application Number: ON: DE91011686; PPN: US 7-486665
• OSTI ID: 5845717
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
01 COAL, LIGNITE, AND PEAT
CHROMIUM ALLOYS
CORROSION RESISTANCE
COAL GASIFICATION PLANTS
CORROSION PROTECTION
COMBUSTORS
CHROMIUM OXIDES
INVENTIONS
ION IMPLANTATION
IRON BASE ALLOYS
NIOBIUM IONS
OXIDATION
PROTECTIVE COATINGS
SCALING
SULFIDATION
THERMAL GRAVIMETRIC ANALYSIS
ZIRCONIUM IONS
ALLOYS
CHALCOGENIDES
CHARGED PARTICLES
CHEMICAL ANALYSIS
CHEMICAL REACTIONS
CHROMIUM COMPOUNDS
COATINGS
GRAVIMETRIC ANALYSIS
INDUSTRIAL PLANTS
IONS
IRON ALLOYS
OXIDES
OXYGEN COMPOUNDS
QUANTITATIVE CHEMICAL ANALYSIS
THERMAL ANALYSIS
TRANSITION ELEMENT COMPOUNDS
360105* - Metals & Alloys- Corrosion & Erosion
010404 - Coal
Lignite
& Peat- Gasification
014000 - Coal
Lignite
& Peat- Combustion