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紫外試驗(yàn)箱模擬雨水和露水對(duì)產(chǎn)品的影響

    在戶(hù)外的材料與濕氣接觸的時(shí)間，每天可以長(zhǎng)達(dá)12小時(shí)，研究結(jié)果表明造成這種戶(hù)外潮濕的主要原因是露水，而不是雨水。紫外老化試驗(yàn)箱通過(guò)一系列*的冷凝原理來(lái)模擬戶(hù)外的濕氣影響。在設(shè)備的冷凝循環(huán)圈中，在箱體的底部有一蓄水箱，并對(duì)其進(jìn)行加熱來(lái)產(chǎn)生水汽。熱蒸汽使試驗(yàn)箱內(nèi)的相對(duì)濕度維持在100％，并且保持一個(gè)相對(duì)高溫。產(chǎn)品的設(shè)計(jì)確保測(cè)試試件實(shí)際上構(gòu)成試驗(yàn)箱的側(cè)壁，從而試件的背面則暴露在室內(nèi)環(huán)境空氣中。室內(nèi)空氣的冷卻效用導(dǎo)致試件表面溫度下降到低于蒸汽溫度幾度的水平。這一溫差的出現(xiàn)導(dǎo)致試件在整個(gè)冷凝循環(huán)過(guò)程中，其表面始終有冷凝生成的液態(tài)水。這種冷凝產(chǎn)物是很穩(wěn)定的純凈蒸餾水。這種純凈水提高了試驗(yàn)的再現(xiàn)率，而同時(shí)避免了水漬問(wèn)題。

In the outdoor materials contact with moisture time, every day can be as long as 12 hours, results show that the main reason causing the outdoor wet dew, instead of the storm. Ultraviolet aging test chamber through a series of unique condensation principle to simulate moisture affects outdoor. In the condensation cycle equipment, in the box at the bottom of a water storage tank, and the water vapor heating to produce. Hot steam to relative humidity test chamber was maintained at , and maintain a relatively high temperature. Product design to ensure that the test specimen in fact constituted test box side wall, thereby specimen back exposure to indoor air pollutants. The utility of the indoor air cooling that lead to the drop surface temperature below the steam temperature a few degrees level. This difference leads to sample in the whole condensation cycle process, the condensation generated liquid water has its surface. The condensation products are pure distilled water is stable. The purified water to improve test reproducibility, while avoiding the water stain problem.

    由于戶(hù)外曝曬接觸潮濕的時(shí)間每天可以長(zhǎng)達(dá)12小時(shí)，因此紫外老化試驗(yàn)箱的潮濕周期一般持續(xù)幾小時(shí)。我們建議每一冷凝周期至少持續(xù)4小時(shí)。注意到設(shè)備中的UV曝曬和冷凝曝曬是分別進(jìn)行的，與實(shí)際氣候條件是一致的。

The outdoor exposure exposure to humid day can be up to 12 hours, so the ultraviolet aging test chamber drying period usually lasts a few hours. We recommend that every condensation cycle for at least 4 hours. Note that UV exposure and condensation exposure devices are respectively, are consistent with the actual weather conditions.

    對(duì)于某些應(yīng)用過(guò)程而言，水噴淋能更好的模擬終使用的環(huán)境條件。水噴淋在模擬由于溫度劇變和由于雨水沖刷所造成的機(jī)械侵蝕是極其有用的。屋面、汽車(chē)材料和在金屬建筑或結(jié)構(gòu)上使用的涂料經(jīng)常會(huì)遭遇到突然的溫度劇變。例如在炎熱的夏季中，當(dāng)熱量堆積后突然由于暴雨而消散。這種溫度劇變的后果對(duì)于許多材料而言是一種挑戰(zhàn)。紫外老化試驗(yàn)箱/噴淋型就是為再現(xiàn)這種條件而專(zhuān)門(mén)設(shè)計(jì)的。

For some applications, simulation of water spray can better end use conditions. The water spray in the simulation because of the temperature change and the rain erosion due to mechanical erosion caused by is extremely useful. Roof, auto materials and coatings used in metal building or structure will often encounter abrupt temperature. For example, in the hot summer, when the heat accumulation and dissipation due to heavy rain suddenly. The temperature change is the consequence of a challenge for many materials. UV accelerated weathering tester / spray type is designed to reproduce the conditions.

    由于經(jīng)常遭到來(lái)自雨水的沖刷，木材的涂料層，包括油漆和著色劑，會(huì)出現(xiàn)相應(yīng)的侵蝕現(xiàn)象。近期研究結(jié)構(gòu)表明，這種雨水沖刷動(dòng)作可以將材料表面有防降解作用的涂料層沖刷掉，從而將材料本身直接曝曬在UV和水分的破壞性影響之下。紫外老化試驗(yàn)箱這一過(guò)程可以重復(fù)多次，從而導(dǎo)致一種材料退化現(xiàn)象，而單靠冷凝方式是無(wú)法再現(xiàn)的

Because often suffer from rain, the coating layer including wood, paint and stain, there will be corresponding erosion phenomenon. The recent research shows that structure, the rain wash action can be the material surface with anti degradation of the coating layer is washed away, so that the material itself directly exposed to the damaging effects of UV and water. This process can be repeated several times, resulting in a material degradation, the condensation is unable to reproduce