Standard Practice for Operating UVC Lamp Apparatus for Exposure of Materials

Importancia y uso:

5.1 Material resistance to photodegradation caused by exposure to artificial UVC light sources is a growing concern due to the use of ultraviolet germicidal irradiation (UVGI) to mitigate the spread of infectious diseases.

5.2 Materials and products intended for direct sunlight exposure are typically designed to resist the effects of the UVA and UVB light reaching the earth’s surface, but generally they are not tested to determine the effects of exposure to UVC, which is filtered out by the atmosphere.

5.3 Compared to light in the UVA and UVB regions of the electromagnetic spectrum, UVC light, when absorbed by a material, can cause photodegradation to proceed at different rates and by different mechanisms as well as confining degradation to a thinner surface layer.

5.4 Indoor materials and products, which typically are not designed to withstand significant ultraviolet light exposure, are at even greater risk of premature degradation when subjected to UVC exposure.

5.5 This practice is intended to induce property changes consistent with those experienced by materials exposed to artificial UVC light sources with a similar spectral irradiance distribution to those specified in this practice.

Subcomité:

G03.03

Volúmen:

14.04

Número ICS:

29.140.30 (Fluorescent lamps. Discharge lamps)

Palabras clave:

accelerated; durability; exposure; germicidal lamp; low pressure mercury lamp; non-metallic materials; UVC; UVGI;