Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
The compatibility of several binary and ternary alloys in a magma environment was studied. Binary alloys containing molybdenum and ternary alloys containing chromium and molybdenum were exposed to basaltic lava at 1150°C for periods of 24 and 96 hours. A cover gas was used to produce oxygen and sulfur fugacities corresponding to those of the gases dissolved in basaltic melts. Three base metals were used. These included iron, nickel, and cobalt. The primary reactions in binary alloys were found to be sulfidation. Oxide scales with a spinel layer formed on ternary alloys. The synergistic effect of molybdenum and chromium additions in ternary alloys exhibited superior corrosion resistance to binary alloys which formed base-metal sulfides down grain-boundaries. Extensive analyses of the reaction products by scanning electron microscopy, X-ray energy dispersive analysis, electron microprobe analysis, and metallography are presented for each alloys. The products formed are discussed with reference to thermodynamic stability diagrams, and the reaction path concept is used to explain some of the corrosion.
Effect of Molybdenum Plus Chromium on the Corrosion of Iron-, Nickel-, and Cobalt-base Alloys in Basaltic Lava and Simulated Magmatic Gas at 1150°C.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
The compatibility of several binary and ternary alloys in a magma environment was studied. Binary alloys containing molybdenum and ternary alloys containing chromium and molybdenum were exposed to basaltic lava at 1150°C for periods of 24 and 96 hours. A cover gas was used to produce oxygen and sulfur fugacities corresponding to those of the gases dissolved in basaltic melts. Three base metals were used. These included iron, nickel, and cobalt. The primary reactions in binary alloys were found to be sulfidation. Oxide scales with a spinel layer formed on ternary alloys. The synergistic effect of molybdenum and chromium additions in ternary alloys exhibited superior corrosion resistance to binary alloys which formed base-metal sulfides down grain-boundaries. Extensive analyses of the reaction products by scanning electron microscopy, X-ray energy dispersive analysis, electron microprobe analysis, and metallography are presented for each alloys. The products formed are discussed with reference to thermodynamic stability diagrams, and the reaction path concept is used to explain some of the corrosion.
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
The compatibility of several binary and ternary alloys in a magma environment was studied. Binary alloys containing molybdenum and ternary alloys containing chromium and molybdenum were exposed to basaltic lava at 1150°C for periods of 24 and 96 hours. A cover gas was used to produce oxygen and sulfur fugacities corresponding to those of the gases dissolved in basaltic melts. Three base metals were used. These included iron, nickel, and cobalt. The primary reactions in binary alloys were found to be sulfidation. Oxide scales with a spinel layer formed on ternary alloys. The synergistic effect of molybdenum and chromium additions in ternary alloys exhibited superior corrosion resistance to binary alloys which formed base-metal sulfides down grain-boundaries. Extensive analyses of the reaction products by scanning electron microscopy, X-ray energy dispersive analysis, electron microprobe analysis, and metallography are presented for each alloys. The products formed are discussed with reference to thermodynamic stability diagrams, and the reaction path concept is used to explain some of the corrosion.
Energy Research Abstracts
Author:
Publisher:
ISBN:
Category : Power resources
Languages : en
Pages : 1696
Book Description
Publisher:
ISBN:
Category : Power resources
Languages : en
Pages : 1696
Book Description
The Scientific Driller
Author:
Publisher:
ISBN:
Category : Boring
Languages : en
Pages : 488
Book Description
Publisher:
ISBN:
Category : Boring
Languages : en
Pages : 488
Book Description
Interference Problems on Wing-fuselage Combinations in Inviscid, Incompressible Flow
Author: Aeronautical Research Council (Great Britain)
Publisher:
ISBN: 9780114709266
Category : Airplanes
Languages : en
Pages : 1212
Book Description
Publisher:
ISBN: 9780114709266
Category : Airplanes
Languages : en
Pages : 1212
Book Description
Masters Theses in the Pure and Applied Sciences Accepted by Colleges and Universities of the United States and Canada
Author: Wade H. Shafer
Publisher: Springer
ISBN: 9780306416613
Category : Science
Languages : en
Pages : 354
Book Description
This series lists applicable thesis titles published in the United States and Canada. Volume 40 covers thesis year 1995. All back volumes are still available.
Publisher: Springer
ISBN: 9780306416613
Category : Science
Languages : en
Pages : 354
Book Description
This series lists applicable thesis titles published in the United States and Canada. Volume 40 covers thesis year 1995. All back volumes are still available.
Geothermal Energy Technology
Author:
Publisher:
ISBN:
Category : Geothermal engineering
Languages : en
Pages : 470
Book Description
Publisher:
ISBN:
Category : Geothermal engineering
Languages : en
Pages : 470
Book Description
Government Reports Announcements & Index
Author:
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 1702
Book Description
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 1702
Book Description
Government Reports Annual Index
Author:
Publisher:
ISBN:
Category : Government reports announcements & index
Languages : en
Pages : 1166
Book Description
Publisher:
ISBN:
Category : Government reports announcements & index
Languages : en
Pages : 1166
Book Description
Government Reports Annual Index: Keyword A-L
Author:
Publisher:
ISBN:
Category : Government reports announcements & index
Languages : en
Pages : 1216
Book Description
Publisher:
ISBN:
Category : Government reports announcements & index
Languages : en
Pages : 1216
Book Description
Survey of Portions of the Chromium-cobalt-nickel-molybdenum Quaternary System at 1200° C
Author: Sheldon Paul Rideout
Publisher:
ISBN:
Category : Chromium-cobalt-nickel-molybdenum alloys
Languages : en
Pages : 92
Book Description
A survey was made of portions of the Chromium-cobalt-nickel-molybdenum quaternary system at 1200 degrees C by means of microscopic and x-ray diffraction studies. Since the face-centered cubic (alpha) solid solutions form the matrix of almost all practically useful high-temperature alloys, the solid solubility limits of the quaternary alpha phase were determined up to 20 percent molybdenum. The component cobalt-nickel-molybdenum, chromium-cobalt-molybdenum, and chromium-nickel-molybdenum ternary systems were also studied. The survey of these systems was confined to the determination of the boundaries of the face-centered cubic (alpha) solid solutions and of the phases coexisting with alpha at 1200 degrees C.
Publisher:
ISBN:
Category : Chromium-cobalt-nickel-molybdenum alloys
Languages : en
Pages : 92
Book Description
A survey was made of portions of the Chromium-cobalt-nickel-molybdenum quaternary system at 1200 degrees C by means of microscopic and x-ray diffraction studies. Since the face-centered cubic (alpha) solid solutions form the matrix of almost all practically useful high-temperature alloys, the solid solubility limits of the quaternary alpha phase were determined up to 20 percent molybdenum. The component cobalt-nickel-molybdenum, chromium-cobalt-molybdenum, and chromium-nickel-molybdenum ternary systems were also studied. The survey of these systems was confined to the determination of the boundaries of the face-centered cubic (alpha) solid solutions and of the phases coexisting with alpha at 1200 degrees C.