金属覆盖层 孔隙率试验 铁试剂试验

[中文适用范围]： 制定了一种在测试金属涂层时显示孔隙或其他不连续性的方法，这些涂层在测试期间不受铁氰化物和氯离子的明显影响，并且对钢铁具有阴极性。 该方法对于用于耐磨的厚硬铬涂层特别有用。 [外文原描述]： Lays down a method of revealing pores or other discontinuities, when testing metallic coatings, that are not visibly affected by ferricyanide and chloride ions during the test period and that are cathodic to iron and steel. This method is especially useful for thick, hard chromium coatings used for wear resistance.