涂料与清漆.弯曲试验(圆柱形芯轴

[中文适用范围]： 本国际标准规定了一种经验性试验程序，用于评估油漆、清漆或相关产品的涂层在标准条件下绕圆柱形心轴弯曲时对金属或塑料基材开裂和/或脱落的抵抗力。对于多涂层系统，可以单独测试每个涂层，也可以测试整个系统。所规定的方法可以按以下方式执行 — 既可以作为“通过/失败”测试，使用单个指定尺寸的心轴进行测试，以评估是否符合特定要求； — 也可以使用连续较小的心轴重复该程序，以确定涂层开裂和/或从基材上脱落的第一个心轴的直径。规定了两种类型的设备，类型 1 适用于厚度不超过 0.3 毫米的测试板，类型 2 适用于厚度不超过 1.0 毫米的测试板。已发现两种类型的设备对相同涂层的结果相似，但通常只使用一种来测试给定的产品。 [外文原描述]： ISO 1519:2011 specifies an empirical test procedure for assessing the resistance of a coating of paint, varnish or related product to cracking and/or detachment from a metal or plastics substrate when subjected to bending round a cylindrical mandrel under standard conditions. For a multi-coat system, each coat can be tested separately or the complete system can be tested. The method specified can be carried out either as a “pass/fail” test, by carrying out the test with a single specified size of mandrel, to assess compliance with a particular requirement; or by repeating the procedure using successively smaller mandrels to determine the diameter of the first mandrel over which the coating cracks and/or becomes detached from the substrate. Two types of apparatus are specified, type 1 being appropriate for use on test panels of thickness up to 0,3 mm, and type 2 for use on test panels of thickness up to 1,0 mm. Both types of apparatus have been found to give similar results with the same coating, but normally only one will be used for testing a given product.