Susceptibility to hydrogen absorption and hydrogen thermal desorption of titanium alloys immersed in neutral fluoride solution under applied potential

Ken'ichi Yokoyama, Katsutoshi Takashima, Jun'ichi Sakai

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    3 Citations (Scopus)

    Abstract

    The susceptibility to hydrogen absorption and hydrogen thermal desorption of titanium alloys has been investigated in a neutral 2.0% NaF solution at 37°C under various applied cathodic potentials. Ti-0.2Pd, Ti-6A1-4V and Ti-11.3Mo-6.6Zr-4.3Sn alloys absorb hydrogen under less noble potentials than -1.5 V, -1.9 V and -1.4 V versus a saturated calomel electrode, respectively. The amounts of absorbed hydrogen of Ti-0.2Pd, Ti-6A14V and Ti-11.3Mo-6.6Zr-4.3Sn alloys under an applied potential of -2.0V for 24h are approximately 1200, 100 and 1100 mass ppm, respectively. Upon immersion in the 2.0% NaF solution under an applied potential, the hydrogen thermal desorption behavior of Ti-0.2Pd alloy differs from those immersed in acid fluoride solutions, whereas the hydrogen thermal desorption behaviors of Ti-6A1-4V and Ti-11.3Mo-6.6Zr-4.3Sn alloys are similar to those immersed in acid fluoride solutions. The present results indicate that in a neutral fluoride solution, the effects of an applied potential on the hydrogen absorption and desorption behaviors of Ti-6A1-4V alloy are considerably smaller than those of commercial pure titanium reported previously, Ti-0.2Pd and Ti-11.3Mo-6.6Zr-4.3Sn alloys.

    Original languageEnglish
    Pages (from-to)1661-1666
    Number of pages6
    JournalMaterials Transactions
    Volume49
    Issue number7
    DOIs
    Publication statusPublished - 2008 Jul

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    Keywords

    • Corrosion
    • Fluoride
    • Hydrogen embrittlement
    • Thermal desorption analysis
    • Titanium

    ASJC Scopus subject areas

    • Materials Science(all)
    • Metals and Alloys

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