Calcium- and sulfur-rich deposits have been linked to failure of turbine components as a consequence of high temperature exposures (> 1000 °C). There are only limited studies on the effects of these deposits on the degradation behavior of turbine alloys. To gain further understanding of this phenomenon, a systematic study was undertaken with model binary nickel–chromium alloys. Three alloys with different chromium contents—low, medium and high—represented by Ni-5Cr, Ni-10Cr and Ni-18Cr, were exposed to CaSO₄-deposit-induced corrosion in the 900–1100 °C temperature range. At 1000 and 1100 °C, the decomposition of CaSO₄ (either by decomposition to CaO and SO₃ or by reacting with Cr₂O₃) led to the formation of calcium chromates and chromium sulfides. At the lower temperature, 900 °C, the limited decomposition of CaSO₄ allowed the formation of a continuous Cr₂O₃ scale.

富含钙和硫的沉积物与高温暴露（> 1000 °C）导致的涡轮机部件故障有关。关于这些沉积物对涡轮机合金退化行为的影响的研究非常有限。为了进一步了解这种现象，对模型二元镍铬合金进行了系统研究。以Ni-5Cr、Ni-10Cr和Ni-18Cr为代表的三种不同铬含量（低、中、高）合金在900-1100 °C温度范围内遭受CaSO _{4沉积诱导腐蚀。在 1000 和 1100 °C 时，CaSO 4}分解（通过分解为 CaO 和 SO ₃或通过与 Cr ₂ O ₃反应）导致形成铬酸钙和硫化铬。_{在较低温度（900 °C）下，CaSO 4}的有限分解允许形成连续的Cr ₂ O ₃垢。