Effect of Sodium Sulfide on Hydrogen Absorption of Ti-6% Al-4% V Alloy

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

5 Scopus Citations
View graph of relations

Author(s)

Detail(s)

Original languageEnglish
Pages (from-to)374-380
Journal / PublicationCorrosion
Volume53
Issue number5
Publication statusPublished - May 1997
Externally publishedYes

Abstract

The hydrogenation inhibitive effect of sodium sulfide (Na2S) on Ti-6% Al-4% V alloy (UNS R56400) in aqueous sulfuric acid solution (H2SO4[aq]) was investigated qualitatively and quantitatively using optical microscopy, x-ray diffraction (XRD), and glow-discharge spectrometry (GDS). Introduction of Na2S into the electrolyte resulted in an obvious inhibitive effect of hydrogen absorption on as-received (covered with a thin thermal oxide film < 0.5 μm) and abraded specimens (free of thermal oxide film) irrespective of applied current density and operating period. The contrary effect of Na2S on Ti-6% Al-4% V alloy vs ferrous alloys could have resulted from the fact that molecular hydrogen sulfide (H2S), which adsorbed on the titanium surface as on the iron surface, facilitated formation of a thin layer of ε titanium hydride (TiH2). TiH2 effectively retarded ingress of hydrogen.

Research Area(s)

  • Cathodic polarization, Concentration depth profiles, Glow-discharge spectrometer, Hydrogen uptake efficiency, Hydrogenation, Inhibitors, Sodium sulfide, Thermal oxide film, Titanium alloys, Titanium hydride, X-ray diffraction

Citation Format(s)

Effect of Sodium Sulfide on Hydrogen Absorption of Ti-6% Al-4% V Alloy. / Wu, T. I.; Liu, C. T.; Wu, J. K.
In: Corrosion, Vol. 53, No. 5, 05.1997, p. 374-380.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review