ISO 29601:2011规定了检测钢或其他金属基材上任何厚度的防护涂料系统中是否存在孔隙的程序。给出的程序基于使用两种不同类型试验设备的方法，设备的选择取决于干膜厚度。这些程序仅适用于油漆系统中不导电部件的测试。 规定的试验方法主要用于新涂层，但也可用于已使用一段时间的涂层。在后一种情况下，重要的是要记住，在使用过程中，涂层可能已被与涂层接触的物质穿透。

ISO 29601:2011 specifies procedures for detecting the presence of porosity in a protective paint system of any thickness on a steel or other metallic substrate. The procedures given are based on methods using two different types of test equipment, the choice of equipment depending on the dry film thickness. These procedures are only applicable to the testing of electrically non-conductive parts of a paint system. The test methods specified are mainly intended for use with new coatings, but can also be used for coatings which have been in service for some time. In the latter case, it is important to bear in mind that the coating might have been penetrated by substances in contact with the coating during service.