Qinsun UV Aging Test Chamber Artificially Accelerated Aging Experiment

The UVA-340 lamp tube equipped with Qinsun UV aging test box provides a new solutio.
UVA-340 UV light source can simulate the short-wave ultraviolet light (<365nm part) of the solar spectrum wel.
Since the solar short-wave ultraviolet light simulated by the UVA-340 ultraviolet light source is usually the main cause of polymer damage, theoretically, the test results of this method have a good correlation with outdoor natural agin.
Shanghai Qianshi Precision Electromechanical Technology C.
, Lt.
can provide UV aging testers, and customers in need are welcome to inquir.
To verify this, we conducted a series of experiments on the correlation between natural outdoor exposure and artificially accelerated aging using a UVA-340 UV light sourc.
In this experiment, epoxy coatings, polyurethane coatings and polyester coatings were selected, and the ultraviolet artificial accelerated aging test and outdoor natural exposure were respectively carried out, and the changes in the gloss and color of the samples were recorde.
Artificial accelerated aging test: The artificial accelerated aging test is performed in accordance with ASTM G154 "Test Method for Ultraviolet Aging of Non-metallic Materials.
The experimental equipment is a UV accelerated aging teste.
The test box has a closed-loop feedback loop system control, which can set and control the UV light irradiation intensit.
The test uses UVA-340 ultraviolet lamp, the peak light intensity is 343nm, and the cut-off point is 295n.
In order to exclude the influence of different temperatures on the experimental results, the test temperature was uniformly set at 50 °.
The experiments were tested under three different cycle conditions: Condition 1: 4h UV light irradiation, 4h condensation; the irradiation point of the UVA-340 lamp was controlled at 83W/(m2·nm)@340nm; the temperature of the entire test cycle was controlled at 50°.
The intensity of UV radiation in this test cycle is equivalent to sunlight at noon in summe.
Condition 2: 4h ultraviolet light irradiation, 4h condensation; the irradiation point of UVA-340 lamp is controlled at 35W/(m2·nm)@340nm; the temperature of the whole test cycle is controlled at 50.
Condition 2 is basically similar to Condition 1, but with stronger irradianc.
Condition 3: 4h UV irradiation (100% UV irradiation, no condensation, no dark cycle); the irradiation point of the UVA-340 lamp is controlled at 35W/(m2·nm)@340nm; the temperature of the entire test cycle is controlled at 50.
Outdoor Natural Exposure Experiments: Since natural outdoor exposures vary widely from place to place, in order to accurately evaluate the experiment, three different typical climate types were selected: subtropical climate (Miami, Florida), desert climate (Phoenix, Arizona) and Northern industrial climate (Cleveland, Ohio.
Outdoor natural exposure is strictly implemented in accordance with ASTM G7 "Non-metallic Materials Outdoor Natural Exposure Test Standard.
The back plate of the tested sample is a plywood with a thickness of 6mm, and the sample holder is 45°, facing sout.