Research on the Thermal Stability in High-Temperature Air of Cr-Fe Composite Oxide Solar Coatings by Chemical-Colored of Stainless Steel

The stainless steel chemical coloration demonstrates excellent repeatability of process when adopted to fabricate solar selective absorber coatings (SSACs) on TTS445J1 base material. optical performance, morphology, and composition are characterized by UV-3600, IR-Affinity-1, SEM, EDS, etc. experimental results suggest that the Cr-Fe composite oxides with in a spinel structure obtained surface exhibit outstanding spectral selectivity, α/ε = 0.9334/0.1326. were generated direct reaction between substrate coloring solution, which changes traditional way combining coating physical methods. Comparing SEM images before after aging at 500 °C air, we noticed no significant interface substrate, indicating adhesion. At same time, grains did not change much oxidation resistance was weakened. Finally, oxide exhibited thermal stability air. Based upon microstructure analysis, Performance Creation (PC) is 0.01 for 200 h high-temperature primarily because loss H2O molecules from hydrates coatings. After 800 h, PC 0.0458. hours extended 1000 0.0762. During high temperature, maintained stable phase structures. decay performance due mainly reconstruction morphology as result largening grains.