7. Stainless Steel
Stainless steel does not corrode, rust, or stain like ordinary steel. It’s applications are various, from kitchen appliances to architecture to aircraft.
German Jewish chemist Hans Goldschmidt developed the process by which carbon-free chromium could be produced in 1893. Goldschmidt patented the thermite reaction in 1895, pursuing both its ability to produce very pure metals and its value in welding. Stainless steel is an alloy that is more than 10 percent chromium with a low carbon content, so Goldschmidt’s discovery allowed scientists to create what would now be considered stainless steel in the early 1900s.