Characteristics of Anodic and Corrosion Films on Zirconium PDF Download
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Author: R. D. Misch
Publisher:
ISBN:
Category : Metals
Languages : en
Pages : 32
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Book Description
Zirconium anodizes similarly to tungsten in respect to the change of interference colors with applied voltage. However, the oxide layer on tungsten cannot reach as great a thickness. Hafnium does not anodize in the same way as zirconium but is similar to tantalum. By measuring the interference color and capacitative thicknesses on zirconium (Grades I and III) and a 2.5 wt.% tin alloy, the film was found to grow less rapidly in terms of capacitance than in terms of interference colors. This was interpreted to mean that cracks develop in the oxide as it thickens. The effect was most pronounced on Grade III zirconium and least pronounced on the tin alloy. The reduction in capacitative thickness was especially noticeable when white oxide appeared. Comparative measurements on Grade I zirconium and 2.5 wt.% tin alloy indicated that the thickness of the oxide film on the tin alloy (after 16 hours in water) increased more rapidly with temperature than the film on zirconium. Tin is believed to act in ways to counteract the tendency of the oxide to form cracks, and to produce vacancies which promote ionic diffusion.
Author: R. D. Misch
Publisher:
ISBN:
Category : Metals
Languages : en
Pages : 32
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Book Description
Zirconium anodizes similarly to tungsten in respect to the change of interference colors with applied voltage. However, the oxide layer on tungsten cannot reach as great a thickness. Hafnium does not anodize in the same way as zirconium but is similar to tantalum. By measuring the interference color and capacitative thicknesses on zirconium (Grades I and III) and a 2.5 wt.% tin alloy, the film was found to grow less rapidly in terms of capacitance than in terms of interference colors. This was interpreted to mean that cracks develop in the oxide as it thickens. The effect was most pronounced on Grade III zirconium and least pronounced on the tin alloy. The reduction in capacitative thickness was especially noticeable when white oxide appeared. Comparative measurements on Grade I zirconium and 2.5 wt.% tin alloy indicated that the thickness of the oxide film on the tin alloy (after 16 hours in water) increased more rapidly with temperature than the film on zirconium. Tin is believed to act in ways to counteract the tendency of the oxide to form cracks, and to produce vacancies which promote ionic diffusion.
Author:
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Category :
Languages : en
Pages :
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Book Description
Zirconium anodizes similarly to tungsten in respect to the change of interference colors with applied voltage. However, the oxide layer on tungsten cannot reach as great a thickness. Hafnium does not anodize in the same way as zirconium but is similar to tantalum. By measuring the interference color and capacitative thicknesses on zirconium (Grades I and III) and a 2.5 wt.% tin ailoy, the film was found to grow less rapidly in terms of capacitance than in terms of iaterference colors. This was interpreted to mean that cracks develop in the oxide as it thickens. The effect was most pronounced on Grade III zirconium and least pronounced on the tin alloy. The reduction in capacitative thickness was especially noticeable when white oxide appeared. Comparative measurements on Grade I zirconium and 2.5 wt.% tin alloy indicated that the thickness of the oxide film on the tin alloy (after 16 hours in water) increased more rapidly with temperature than the film on zirconium. Tin is believed to act in ways to counteract the tendency of the oxide to form cracks, and to produce vacancies which promote ionic diffusion. (auth).
Author: Nels Roland Nelson
Publisher:
ISBN:
Category : Zirconium
Languages : en
Pages : 224
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Author: R. D. Misch
Publisher:
ISBN:
Category : Corrosion resistant materials
Languages : en
Pages : 92
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Zirconium of varying quality was tested by anodizing at constant voltage and at constant current density. The pattern of film growth was found to be sensitive to metal composition and surface preparation. The relation of anodic film growth to corrosion must take into account certain characteristics peculiar to anodizing. These are chiefly concerned with the electrical field in the oxide and the effect of the electrolytes.
Author: R. D. Misch
Publisher:
ISBN:
Category : Electric conductivity
Languages : en
Pages : 42
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Oxide films were produced on zirconium and zirconium-titanium alloys by anodizing and by exposure to oxygen and water at high temperatures. The electrical resistances of the films were measured in air at room temperature and in vacuum at temperatures up to 290 deg C.
Author: L. E. Colteryahn
Publisher:
ISBN:
Category : Zirconium
Languages : en
Pages : 16
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Author: Laurence Charles Archibald
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ISBN:
Category :
Languages : en
Pages :
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Author: C. M. Schwartz
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ISBN:
Category : Oxide coating
Languages : en
Pages : 28
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Author: Heather L. Jensen
Publisher:
ISBN:
Category : Nuclear reactors
Languages : en
Pages : 314
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Author: Boris Grigorevich Parfenov
Publisher:
ISBN:
Category : Zirconium
Languages : en
Pages : 204
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