The Influence of the Method of Obtaining Titanium Hydride on its Corrosion, Surface-Kinetic, and Acidic Properties
The Influence of the Method of Obtaining Titanium Hydride on its Corrosion,
Surface-Kinetic, and Acidic Properties
Tovmasyan Martun,
Galstyan Ani
Summary
Key words: crystal structure, corrosion resistance, direct hydrogenation, chemical reduction, electrochemical method, mechanochemical method
Titanium hydride (TiH₂) is an important material in metallurgy, hydrogen energy, and catalysis. Its physicochemical and surface properties largely depend on the method of production. TiH₂ samples obtained by different methods demonstrate different structural, corrosive, and acidic properties. This article compares the corrosion properties of titanium hydride obtained by direct hydrogenation and self-propagating high-temperature synthesis in various acidic media. The analysis shows that the production method determines not only the crystal structure of the hydride, but also the stability of its surface, the reaction rate in acidic media, and corrosion resistance. The studies were carried out in solutions of acids HCl, HF, HNO₃, H₂SO₄, CH3COOH of various concentrations. The corrosion patterns for samples obtained by both methods are the same, however, there are significant differences between the rates of mass loss and the rates of hydrogen evolution; these rates are higher for samples obtained by self-propagating high-temperature synthesis (SHS) (approximately 1.2 times).
DOI: https://doi.org/10.58726/27382923-2025.2-16