In many cases non-zinc anodes outperform actual zinc anodes, depending upon the type of metal you need to protect and the nature of the water in which the metal being protected is immersed. It all has to do with the voltage of the anode when referenced against a standard.
Chemical engineers use their knowledge of chemistry, physics, engineering and biology to find solutions to challenges involving things like materials manufacturing and food processing.
Pharmaceuticals. Chemical engineers working in the medical field can work on pharmaceuticals or perform research into new medical devices and procedures. A career in pharmaceuticals involves finding new medicines and medical solutions to diseases and other medical conditions.