Hydrogen solubility in amorphous and crystalline materials

Abstract

Electrochemical hydrogen permeation tests were performed in an electrolyte of 0.1 N NaOH at 313 K with the objective of studying the hydrogen solubility in metallic amorphous and crystalline materials. Samples were prepared from the amorphous metallic alloys Ni 81 P 19 and Fe 40 Ni 38 Mo 4 B 18 and crystalline pure nickel and palladium, as well as low carbon steel. It was shown that the hydrogen solubility in Ni 81 P 19 amorphous alloy is much bigger than in the Fe 40 Ni 38 Mo 4 B 18 glassy alloy and in the crystalline pure nickel, palladium and low carbon steel. Also that a terminal hydrogen solid solubility of 1232.0±334.1 mol H m - 3 is attained in the Fe 40 Ni 38 Mo 4 B 18 amorphous alloy by forming a hydride phase, while, under the same conditions, the Ni 81 P 19 glassy alloy dissolves 11645.0±341 mol H m - 3 as a partial hydrogen solid solubility without transforming into hydride. The cathodic hydrogen generation potential used in the hydrogen permeation tests was shown to influence the hydrogen permeation kinetics.)