Abstract
This study investigated the influence of electrochemically generated hydrogen on the passivation of Ni-Ti alloy surfaces. The hydrogen charging process, conducted using galvanostatic polarization, led to an increase in the passive current density. Electrochemical Impedance Spectroscopy and Mott-Schottky analysis revealed an increase in the conductivity of the film, related to an increase in defect density following hydrogen charging. Auger electron spectroscopy reported a decrease in film thickness, and X-ray Photoelectron Spectroscopy indicated compositional changes. A critical finding was the increased electrochemical conductivity of the passive film, which can be attributed to hydrogen adsorption and/or absorption.
Published Version
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