 
 <prompt> Wetin dem dey call am when hydrogen dey purify? Based on di question wey dey above, write something wey get di answer inside. E fit be 1 - 20 sentences. Context: <response>: ```Hydrogen dey dissolve well well for plenti rare earth and transition metals and e fit dissolve for both nanocrystalline and amorphous metals. Hydrogen wey dey dissolve for metals dey affected by local distortions or impurities for the crystal lattice. These properties fit dey useful when hydrogen dey purified by passage through hot palladium disks, but the gas high solubility na metallurgical problem, e dey cause embrittlement for plenti metals, e dey make am hard for design pipelines and storage tanks.``` 