Institute of Materials Engineering represented at MI(N)T-Mach-Saturday
Julia Richter, Lisa Ott and Johanna Frenck (photo from left) had a lot of fun presenting the Institute's research topics to the visitors and were delighted with the many interested people at their stand. Here, the mainly younger visitors were able to diligently microscope and also see how copper coins are "dyed" gold. In addition to a corroded steel pipe and a copper coin, any object within reach of the microscope could be examined under the microscope. There were no limits to the imagination of the little ones, who were able to examine clothing, skin and even jewelry. The microscope, which is an elementary tool for material analysis, aroused great interest among the visitors and was therefore in constant use.
The three women were also "on the trail of the secret of corrosion", as advertised on their poster. Copper coins were coated with a layer of zinc in an alkaline zinc powder suspension. The coins were then held in a burner flame, causing the zinc layer to react with the copper layer on the coin to form a brass alloy.