High temperature corrosion studies are more relevant than ever to meet today’s challenges in energy production. Fundamental and applied research in this field plays an essential role in the successful shift from the conversion or combustion of fossil fuels to heterogeneous renewable fuels and renewable energies. Associated with the shift to renewable and carbon neutral processes are generally higher temperatures, novel process conditions and media such as salt melt exposures. Additionally, the common process gases and complex environments often change, sometimes with higher amounts of H2 or H2O. Therefore, it is essential to provide alloy designs that deliver stronger high-temperature oxidation and corrosion resistance, while retaining mechanical properties. Another approach to achieving these goals is the combination of load bearing substrates with advanced coatings.