Do you ever wonder how airplanes are made to survive the different elements in the sky? Or, how a space craft can sustain such high heat during launch and then the extremely cold temperatures while in orbit? What is it that manufacturers of these aircrafts use in order to make sure their products are reliable in extreme temperatures? Among others, they achieve this using protective coatings. In aircraft engines, for instance, conversion coatings of airfoils have the function of protecting the base alloys (nickel-, iron-, and cobalt-based alloys) to prevent against corrosion at high operating temperatures. For manufacturers of these aircraft and their parts, it is critical to ensure that the materials will not fail. Here at Eurofins EAG Laboratories (EAG) we are skilled in the testing of these materials using Elemental Depth Profiling.