Aluminum is not damaged by hydrogen. Hydrogen is generally a problem only at high pressure. Before we had "natural gas", we had "lamp gas", hydrogen and carbon

Aluminum is not damaged by hydrogen. Hydrogen is generally a problem only at high pressure. Before we had "natural gas", we had "lamp gas", hydrogen and carbon monoxide delivered via cast-iron pipes. The usual form of stored bulk hydrogen will be cryogenic liquid at only a little above atmospheric pressure. That said, ammonia is a more practical storage medium. Unlike methane, it only needs universally available feedstocks: hydrogen from water and nitrogen from air, and may be stored at room temperature under not very high pressure.