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 Ni81P19 and Fe40Ni38Mo4B18 and crystalline pure nickel and palladium, as well as low carbon steel. It was shown that the hydrogen solubility in Ni81P19 amorphous alloy is much bigger than in the Fe40Ni38Mo4B18 glassy alloy and in the crystalline pure nickel, palladium and low carbon steel. Also that a terminal hydrogen solid solubility of 1232.0+/-34.1 mol H m(-3) is attained in the Fe40Ni38Mo4B18 amorphous alloy by forming a hydride phase, while, under the same conditions, the Ni81P19 glassy alloy dissolves 11645.0+/-41 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.