Corrosion of Titanium Matrix Composites

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The corrosion behavior of unalloyed Ti and titanium matrix composites containing up to 20 vol% of TiC or TiB{sub 2} was determined in deaerated 2 wt% HCl at 50, 70, and 90 degrees C. Corrosion rates were calculated from corrosion currents determined by extrapolation of the tafel slopes. All curves exhibited active-passive behavior but no transpassive region. Corrosion rates for Ti + TiC composites were similar to those for unalloyed Ti except at 90 degrees C where the composites were slightly higher. Corrosion rates for Ti + TiB{sub 2} composites were generally higher than those for unalloyed Ti and increased ... continued below

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7 pp. (unnumbered)

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Covino, B.S., Jr. & Alman, D.E. September 22, 2002.

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Description

The corrosion behavior of unalloyed Ti and titanium matrix composites containing up to 20 vol% of TiC or TiB{sub 2} was determined in deaerated 2 wt% HCl at 50, 70, and 90 degrees C. Corrosion rates were calculated from corrosion currents determined by extrapolation of the tafel slopes. All curves exhibited active-passive behavior but no transpassive region. Corrosion rates for Ti + TiC composites were similar to those for unalloyed Ti except at 90 degrees C where the composites were slightly higher. Corrosion rates for Ti + TiB{sub 2} composites were generally higher than those for unalloyed Ti and increased with higher concentrations of TiB{sub 2}. XRD and SEM-EDS analyses showed that the TiC reinforcement did not react with the Ti matrix during fabrication while the TiB{sub 2} reacted to form a TiB phase.

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7 pp. (unnumbered)

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  • 15th International Corrosion Congress, Granada, Spain, Sept. 22-27, 2002 (sponsored by ICC--International Corrosion Congress)

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  • Report No.: DOE/ARC-2002-011
  • Grant Number: NONE
  • Office of Scientific & Technical Information Report Number: 821883
  • Archival Resource Key: ark:/67531/metadc780332

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  • September 22, 2002

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  • Dec. 3, 2015, 9:30 a.m.

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  • Nov. 2, 2016, 6:06 p.m.

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Covino, B.S., Jr. & Alman, D.E. Corrosion of Titanium Matrix Composites, article, September 22, 2002; (digital.library.unt.edu/ark:/67531/metadc780332/: accessed September 25, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.