油漆和清漆 - 横切试验

[中文适用范围]： 本文件规定了一种测试方法，用于评估当直角格子图案被切入涂层并渗透到基材时，油漆涂层和清漆（包括木材着色剂）对与基材分离的抵抗力。 除其他因素外，由该经验测试程序确定的性能取决于涂层与前一涂层或基材的粘附力。 然而，该程序并不是测量粘附力的方法。 注 1：如果需要测量附着力，请参见 ISO 4624 中描述的方法。 注 2：虽然该测试主要用于实验室，但该测试也适用于现场测试。 所描述的方法可以用作通过/失败测试，或者在情况合适的情况下用作六步分类测试。 当应用于多层涂层系统时，可以评估涂层各层相互分离的阻力。 该测试可以在成品和/或专门准备的测试样本上进行。 虽然该方法适用于硬质（例如金属）和软质（例如木材和石膏）基材上的油漆，但这些不同的基材需要不同的测试程序（参见第8条）。 该方法不适用于总厚度大于 250 µm 的涂层或有纹理的涂层。 注 3：当该方法应用于旨在提供粗糙图案表面的涂层时，将给出显示过多变化的结果（另见 ISO 16276-2）。 [外文原描述]： This document specifies a test method for assessing the resistance of paint coatings and varnishes (including wood stains) to separation from substrates when a right-angle lattice pattern is cut into the coating, penetrating through to the substrate. The property determined by this empirical test procedure depends, among other factors, on the adhesion of the coating to either the preceding coat or the substrate. This procedure is not, however, a means of measuring adhesion. NOTE 1 Where a measurement of adhesion is required, see the method described in ISO 4624. NOTE 2 Although the test is primarily intended for use in the laboratory, the test is also suitable for field testing. The method described can be used either as a pass/fail test or, where circumstances are appropriate, as a six-step classification test. When applied to a multi-coat system, assessment of the resistance to separation of individual layers of the coating from each other can be made. The test can be carried out on finished objects and/or on specially prepared test specimens. Although the method is applicable to paint on hard (e.g. metal) and soft (e.g. wood and plaster) substrates, these different substrates need a different test procedure (see Clause 8). The method is not suitable for coatings of total thickness greater than 250 µm or for textured coatings. NOTE 3 The method, when applied to coatings designed to give a rough patterned surface, will give results which will show too much variation (see also ISO 16276-2).