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.
Staples are made of either mild steel alloys or aluminium or brass or zinc alloys... Staples are made out of metal or zinc plated steel. They have also been known to be made out of stainless steel (to provide rust proofing). The thickness of the staple depends on its use, be it stapling papers together or being used in construction. Staples are made by mending large pieces of metal together and then being bent into the shape of a staple. Imagine a long piece of thin metal in the shape of an upside down U (the staple shape). A sharp cutter then slices the staple into its appropriate size by moving down the metal (like corn on the cob).