ASTM D5894-16
涂覆金属循环烟雾/紫外线曝光的标准实施规程 (在雾/干柜和紫外线/凝结柜中交替曝光)

Standard Practice for Cyclic Salt Fog/UV Exposure of Painted Metal, (Alternating Exposures in a Fog/Dry Cabinet and a UV/Condensation Cabinet)

被代替

ASTM D5894-16 发布历史

ASTM D5894-16由美国材料与试验协会 US-ASTM 发布于 2016。

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ASTM D5894-16 发布之时，引用了标准

• ASTM D1654 用于评估腐蚀性环境的涂层或涂层样品的标准测试方法
• ASTM D4587 用荧光紫外线曝光曝水装置对涂料及有关涂层和材料进行测试的标准实施规程
• ASTM D610 评定涂漆钢表面锈蚀程度的标准试验方法
• ASTM D714 油漆起泡等级评定的标准试验方法
• ASTM G113 与非金属材料自然和人工风蚀试验相关的标准术语
• ASTM G147 自然与人工老化试验用非金属材料的修整和维护标准规程
• ASTM G151 利用实验室光源的加速试验装置中非金属材料曝光的标准实施规程
• ASTM G154 材料暴露用荧光紫外（UV）灯装置操作的标准实施规程
• ASTM G85 改进的盐喷雾(雾化)试验

ASTM D5894-16的历代版本如下：

• 2021年 ASTM D5894-21 涂漆金属的周期性盐雾/紫外线暴露的标准实施规程（雾/干燥柜和紫外线/冷凝柜中的交替暴露）
• 2016年 ASTM D5894-16 涂覆金属循环烟雾/紫外线曝光的标准实施规程 (在雾/干柜和紫外线/凝结柜中交替曝光)
• 2010年 ASTM D5894-10 彩色金属循环盐雾/紫外线暴露的标准操作（雾/干柜和UV /冷凝柜中的交替曝光）
• 2005年 ASTM D5894-05 镀膜金属暴露于循环盐雾/紫外线的标准实施规程(交替暴露在雾/干室和紫外线/冷凝室中)
• 1996年 ASTM D5894-96 镀膜金属暴露于环流盐雾/紫外线的标准实施规范(交替暴露在雾/干室和紫外线/冷凝室)

5.1 The outdoor corrosion of painted metals is influenced by many factors, including: corrosive atmospheres, rain, condensed dew, UV light, wet/dry cycling, and temperature cycling. These factors frequently have a synergistic effect on one another. This practice is intended to provide a more realistic simulation of the interaction of these factors than is found in traditional tests with continuous exposure to a static set of corrosive conditions.

5.2 Results obtained from this practice can be used to compare the relative durability of materials subjected to the specific test cycle used.

5.3 No single exposure test can be specified as a complete simulation of actual use conditions in outdoor environments. Results obtained from exposures conducted according to this practice can be considered as representative of actual outdoor exposures only when the degree of rank correlation has been established for the specific materials being tested. The relative durability of materials in actual outdoor service can be very different in different locations because of differences in UV radiation, time of wetness, temperature, pollutants, and other factors. Therefore, even if results from a specific artificial test condition are found to be useful for comparing the relative durability of materials exposed in a particular exterior environment, it cannot be assumed that they will be useful for determining relative durability for a different environment.

5.4 Even though it is very tempting, it is not recommended to calculate an “acceleration factor” relating x hours of laboratory exposure to y months of exterior exposure. Different materials and different formulations of the same material can have significantly different acceleration factors. The acceleration factor also varies depending on the variability in rate of degradation in the laboratory test and in actual outdoor exposure.

5.5 This practice is best used to compare the relative performance of materials tested at the same time in the same exposure device. Because of possible variability between the same type of exposure devices, it is not recommended to compare the amount of degradation in materials exposed for the same duration at separate times, or in separate devices running the same test condition. This practice should not be used to establish a “pass/fail” approval of materials after a specific period of exposure unless performance comparisons are made relative to a control material exposed simultaneously, or the variability in the test is rigorously quantified so that statistically significant pass/fail judgments can be made.

5.6 This practice has been found useful for air-dry industrial maintenance paints on steel3,4,5,6,7 and zinc-rich primers but its applicability ......

标准号

ASTM D5894-16

发布

2016年

发布单位

美国材料与试验协会

替代标准

ASTM D5894-21

当前最新

ASTM D5894-21

 

 

引用标准

ASTM D1654 ASTM D4587 ASTM D610 ASTM D714 ASTM G113 ASTM G147 ASTM G151 ASTM G154 ASTM G85

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