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10:04 Apr 26, 2019 |
English to Russian translations [PRO] Science - Physics | |||||||
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| Selected response from: Landsknecht Ukraine Local time: 14:23 | ||||||
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q-uvb exposure экспозиция Q-UVB (Испытания устойчивости внешнего вида лакокрасочных покрытий) Explanation: Fluorescent UV lamps are typically categorized as UVA or UVB lamps based on the wavelength of the UV output. • QUV-A 340 Testing: Simulates the effects of real sunlight with fluorescent ultraviolet UVA-340 lamps, which provide excellent simulation of sunlight in the critical short wavelength region from 365 nm down to the solar cutoff of 295 nm. This type of UV lamp is recommended for QUV testing by the global ASTM G154 Standard. UVA340 lamps are especially useful for comparison tests of different coating formulations. • QUV-B 313 Testing: To speed up acceleration testing, UVB-313 lamps are used. They produce not only the shortest ultraviolet rays that the sun emits, they also emit unnaturally, short-wavelengths below what is found on the earth’s surface, which can produce anomalous results. This type of UVB light can initiate chemical reactions to occur in the coating that would normally not be possible under natural, real-world sunlight exposures. This testing has been proven to have poor correlation to natural weathering. It can cause failures in good-quality coatings that would not occur in natural sunlight and false positives in coatings that contain low-quality pigmentation https://www.valsparcoilextrusion.com/opencms/export/sites/co... (2000) Ultraviolet exposure (UV-B) perturbations caused by the quasi-biennial oscillations (QBO) in ozone. J Geophys Res 105:29189–29193 Hermansdörfer I, ... https://books.google.com.ua/books?id=_lCFQkM2i_4C&pg=PA146&l... https://files.stroyinf.ru/Data2/1/4293768/4293768526.pdf |
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q-uvb exposure воздействие ультрафиолетовым излучением средневолнового диапазона Explanation: https://www.researchgate.net/figure/Polychromatic-and-photor... after 1000Hrs Q-UVB exposure = после воздействия ультрафиолетовым излучением средневолнового диапазона в течение 1000 часов |
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