Currently, most hydrogen is made this way from natural gas. An electrical current can also be used to separate water into its components of oxygen and hydrogen. This process is known as electrolysis. Some algae and bacteria, using sunlight as their energy source, even give off hydrogen under certain conditions.
Originally, metal roofs were made of corrugated galvanized steel: a wrought ironâsteel sheet was coated with zinc and then roll-formed into corrugated sheets. Another approach is to blend zinc, aluminum, and silicon-coated steel.
Galvanized Sheet Metal Ducts from The Duct Shop's. ductwork is manufactured from high quality galvanized steel in 3 foot lengths for easy handling. One end of each piece is crimped for easy fitting of consecutive joints or to sheet metal fittings and flexible duct.uctwork is manufactured from high quality galvanized steel in 3 foot lengths for easy handling. One end of each piece is crimped for easy fitting of consecutive joints or to sheet metal fittings and flexible duct.