Orientation dependence and bonding during pitting corrosion of HCP metals.

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The orientation dependence of pitting in single crystal beryllium (Be) is compared to the observations for single crystal zinc (Zn) reported by other investigators. The pit walls in stable propagating pits for prism planes were always square; in the (ioio) surface the walls were normal to the [0001] and [{bar 1}2{bar 1}0] directions while in the (110) surface the walls were normal to the [0001] and [{bar 1}100] directions. In addition, for the (ioio) and (11{bar 2}0) surfaces the pit interiors were characterized by crystallographically oriented parallel plates of unattacked Be. The orientation of these lamella was quite different than ... continued below

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9 p.

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Lillard, Robert Scott January 1, 2002.

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Description

The orientation dependence of pitting in single crystal beryllium (Be) is compared to the observations for single crystal zinc (Zn) reported by other investigators. The pit walls in stable propagating pits for prism planes were always square; in the (ioio) surface the walls were normal to the [0001] and [{bar 1}2{bar 1}0] directions while in the (110) surface the walls were normal to the [0001] and [{bar 1}100] directions. In addition, for the (ioio) and (11{bar 2}0) surfaces the pit interiors were characterized by crystallographically oriented parallel plates of unattacked Be. The orientation of these lamella was quite different than those observed in Zn. To explain this difference, the electron density distributions in the metal lattices are analyzed. A conceptual model for crystallographic pitting is introduced. In this model it is proposed that the crystallographic pits observed in single crystal hcp metals reflects the bond energy in the lattice.

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9 p.

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  • Submitted to: Proceedings of the Electrochemical Society, P4.2001-22.

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  • Report No.: LA-UR-02-0035
  • Report No.: LA-UR-02-35
  • Grant Number: none
  • Office of Scientific & Technical Information Report Number: 975929
  • Archival Resource Key: ark:/67531/metadc925645

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Office of Scientific & Technical Information Technical Reports

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  • January 1, 2002

Added to The UNT Digital Library

  • Nov. 13, 2016, 7:26 p.m.

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  • Dec. 12, 2016, 12:38 p.m.

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Lillard, Robert Scott. Orientation dependence and bonding during pitting corrosion of HCP metals., article, January 1, 2002; United States. (digital.library.unt.edu/ark:/67531/metadc925645/: accessed October 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.