Degradation of concentrating solar thermal reflectors in acid rain atmospheres

Main corrosion features that appeared in the reflective area of Type 1 silvered-glass reflectors at the end of the different corrosion tests. K_0_25 is the test at 0 dm3 SO2, 25 °C, K_0_40 is the test at 0 dm3 SO2, 40 °C, K_0_50 is the test at 0 dm3 SO2, 50 °C, K_0.2_40 is the test at 0.2 dm3 SO2, 40 °C, K_1_25 is the test at 1 dm3 SO2, 25 °C, K_1_40 is the test at 1 dm3 SO2, 40 °C, K_1_50 is the test at 1 dm3 SO2, 50 °C, K_2_40 is the test at 2 dm3 SO2, 40 °C, N is the sum of the number of corrosion spots visible to the naked eye at the end of testing on a 300 cm2 total reflector surface, Max. Pen. is the maximum penetration of corrosion near the edge (μm), Δρλ,φ is the mean increment in monochromatic specular reflectance on reflector surfaces not predamaged (-), Total Corr. is the mean total corrosion of the whole reflector surface (%).361