UV BOX - Senze-Instruments

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Process & Quality Control


Coatings & Industry > Corrosion + Ageing > Accelerated Weathering Test
UV BOX simulates the effects of sunlight with ultraviolet rays using UV fluorescent lamps and also reproduces dew and rain using moisture condensation and water spray.
The accelerated UV aging test reproduces the damage caused by sunlight, rain and dew. In a few days or weeks of exposure of the samples inside the UV BOX, damages occurring in months or years of outdoor exposure can be reproduced.
To simulate aging due to external atmospheric agents, UV BOX subjects the materials to alternating cycles  of  UV  radiation  and  humidity  at  controlled  high  temperatures.  The  instrument  simulates  the effects of sunlight through the use of special UV fluorescent lamps and the simulation of the effect of dew and rain occurs through condensation or a spray of water (Spray option).
UV  radiation  is  responsible  for  almost  all  the  processes  of photo  degradation of  durable  materials
exposed to the external environment. The fluorescent lamps used in the UV BOX simulate critical UV short  waves  and  realistically  reproduce  the  damage  caused  by  sunlight.  The  types  of  damage  that can be simulated with the UV BOX are the following: color change, loss of gloss, chalking, cracking, cracks, blistering, veiling, brittleness, loss of strength and oxidation.
Dew is mainly responsible for most of the moisture that occurs during out door exposure, much more than rain.
The condensation system of the UV BOX realistically simulates dew and amplifies its effect through the use of high temperatures.
The  condensation  process  automatically  purifies  the  network  water  used  in  the  system.  This is because  the  process  of  evaporation  and  condensation  of  water  on  samples  is  actually  a  distillation process, which allows to remove all impurities.
UV BOX can accommodate up to 48 standard samples (75mm x 150mm) and it is possible to create special sample holders according to customer specifications.
UV lamps
UV  fluorescent  lamps  are  more  stable  than  other  types  of  lamps,  including  xenon  arc  lamps.  The spectral distribution (SPD) is not changed with the aging of the lamp, even after thousands of hours of operation, and this feature involves in more reproducible results, less frequent lamp replacements and a reduction in operating costs

Lamp s UVA-340:
UVA -340 lamps offer the best simulation of sunlight in the critical wavelength region from 365 nm up to the solar cut-off value of 295 nm.

Lamps UVB-313:
UVB-313  lamps  maximize  acceleration  through  the  use  of  the  most  aggressive  UV  short  waves compared  to those  normally  arriving  on  the  earth's  surface.
As  a  result,  for  some  materials  these lamps can produce too severe and unrealistic results
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