The thermochemistry of the corrosion of ceramic coating materials in extreme environments provides the fundamental basis for understanding their phase stability equilibria which is used to improve their durability in aerospace applications.  Corrosion of gas turbine engine ceramic coatings by molten silicate debris is an excellent example for such a thermochemistry study. Here, we explore high temperature calorimetric techniques to evaluate the energetics of corrosion of ceramic coating materials and their binary oxide components by silicate melts with varying mol percentages of the network former SiO2 in the CaO-MgO-Al2O3-SiO2 (CMAS) system. The measured enthalpies indicate that the energetic stability of coating materials and their binary oxide components with the CMAS melts depends on the difference between their acid-base character and melt speciation. Corrosion was found to be become stronger with increasing difference in acid-base character between the coatings and the silicate melts. Moreover, the reactivity between coating materials and the melt is expected to increase as their formation enthalpies become less exothermic (more positive). Implications of these results on strategies predicting the energetic contribution of each binary oxide component on the silicate-induced corrosion of the coating materials and melt structure are discussed.