油漆和清漆 附着力拉拔试验

[中文适用范围]： 本文件规定了三种通过对油漆、清漆或相关产品的单层或多层涂层系统进行拉拔试验来确定附着力的方法。这些方法包括： — 方法 A：使用两个小推车，适用于测试刚性和可变形基材； — 方法 B：仅从一侧进行测试，使用单个小推车，仅适用于刚性基材； — 方法 C：使用小推车，其中一个为涂漆基材。这些测试方法已被发现可用于比较不同涂层的附着力行为。它最适用于为一系列表现出显著附着力差异的涂层面板提供相对评级。该测试可用于多种基材。根据基材是可变形的（例如薄金属、塑料和木材）还是刚性的（例如厚混凝土和金属板），给出了不同的程序。为了避免基材在拉伸试验期间变形，通常使用夹层结构。例如，出于特殊目的，可以将涂层直接涂在测试小推车的表面上。 [外文原描述]： This document specifies three methods for determining the adhesion by carrying out a pull-off test on a single coating or a multi-coat system of paint, varnish or related product. These methods include: — method A: using two dollies, suitable for testing both rigid and deformable substrates; — method B: testing from one side only, using a single dolly, suitable for rigid substrates only; — method C: using dollies, one as a painted substrate. These test methods have been found useful in comparing the adhesion behaviour of different coatings. It is most useful in providing relative ratings for a series of coated panels exhibiting significant differences in adhesion. The test can be applied using a wide range of substrates. Different procedures are given according to whether the substrate is deformable, e.g. thin metal, plastics and wood, or rigid, e.g. thick concrete and metal plates. To avoid distortion of the substrate during the tensile test, it is common to use a sandwich construction. For example, for special purposes, the coating can be applied directly to the face of a test dolly.