ISO 18089:2015描述了恒电位控制下测定不锈钢临界缝隙温度（CCT）的程序。 该试验的主要优点是在一个试验程序中可以快速测量CCT。本国际标准中确定的CCT可作为性能的相对指标，例如，用于比较不同等级不锈钢的相对性能。 本国际标准中所述的试验不用于确定在使用中发生缝隙腐蚀的温度。 本方法不适用于根据ISO 17864测量的临界点蚀温度（CPT）值低于20°C的材料，当在相同试验溶液和相同电位下测量时

ISO 18089:2015 describes the procedure for determining the critical crevice temperature (CCT) for stainless steels under potentiostatic control. The principal advantage of the test is the rapidity with which the CCT can be measured in a single test procedure. The CCT, as determined in this International Standard, can be used as a relative index of performance, for example, to compare the relative performance of different grades of stainless steel. The test described in this International Standard is not intended to determine the temperature at which crevice corrosion will occur in service. This method is not intended for materials with critical pitting temperature (CPT) values below 20 °C measured in accordance with ISO 17864, when measured in the same test solution and at the same potential