Carve Steel with Saltwater, Electricity and a Tin Earring (BB Video + Theo Gray + Popsci.com) скачать в хорошем качестве

Carve Steel with Saltwater, Electricity and a Tin Earring (BB Video + Theo Gray + Popsci.com)

Boing Boing Video (boingboingvideo.com) teamed up with Theo Gray and Popsci.com to produce this video that demonstrates how you can mold steel with electrochemical machining, using a soft, cheap piece of tin -- without any physical contact. Theo is the author of the book Mad Science, in which many other experiments like this are featured. Theo says: "I remember seeing a demonstration of a seemingly magic process at an engineering open house decades ago, in which a soft metal bit carved detailed shapes into far harder metals. It's called electrochemical machining (ECM), and it's so simple in principle that you can do it at home with a drill press, a battery charger and a pump for a garden fountain. "ECM is basically electroplating in reverse. In electroplating, you start with a solution of dissolved metal ions and run an electric current through the liquid between a positive electrode and the object you want to plate (the negative side). The ions deposit themselves as solid metal onto the surface of the object." - - - - Read the whole HOWTO over at popsci.com: Carve Steel with Saltwater, Electricity and a Tin Earring http://www.popsci.com/powersculpting