意义及用途
5.1 快速准确地评估和预测植物涂层的长期耐候性能的能力对于做出正确的业务和技术决策非常重要.

5.2 重要的是要包括已知现场特性的控制样本，以确定特定基材和涂层系统的实践效果. 这些控制样品可能包括已知对于所考虑的缺陷具有可接受和不可接受的现场特性的材料.

5.3 The results derived from this practice are better used to compare the relative properties of materials tested simultaneously in the same device.

5.4 The inclusion of control samples and their resulting data will help to deal with test variability caused by seasonal or annual changes in important climatic factors.

5.5 Extensive research was conducted in the development of this standard practice. The study showed that this approach was not useful for determining quantitative accelerators. 然而, this test is useful as a comparison test.

5.6 It is recommended that control samples and samples be repeated at least twice for statistical evaluation of the results. For additional guidance on determining the number of repeats, see Practice G169.

ASTM D5722-2014 使用集中自然阳光和土壤冻融程序加速工厂涂层压花硬纤维板户外风化的标准实践

步 1: 范围
1.1 This Practice includes techniques for accelerating the weathering effects of factory coated patterning hard fiberboard using the Practice G90’s 1st cycle (concentrated natural sunlight with periodic surface water spray) plus a soil-freeze-thaw cycle (参见章节 5 of this Practice).

1.2 Tests performed using the methods described in this practice may be used for qualitative assessment of weathering effects. The relative durability of coated cardboard can be well determined by comparing their test results with those of control samples from real-time exposure test experience.

1.3 以 SI 单位或英寸-磅单位表示的值应单独视为标准值. 每个系统中规定的值可能并不完全相同; 所以, 每个系统应独立使用. 组合两个系统的值可能会导致不合规.

1.4 本标准并非旨在解决所有安全问题, 如果有的话, 与其使用相关. 本标准的使用者有责任建立适当的安全和健康实践，并在使用前确定监管限制的适用性.