The mechanism of aging of reference articles for penetrant nondestructive testing: Part I. Effects of materials for nondestructive testing on aging of articles

Different versions of reference articles and specific features of their use for testing the working capacity of materials for penetrant nondestructive testing are described. The reasons and specific features of degradation of reference articles over time are considered. Gradual contamination of crack holes by traces of the materials for nondestructive testing and by products of metal corrosion and oxidation are the main reason for deterioration of the quality of articles. Specific features of the accumulation of contaminants, oxides, and oxidation products in crack holes, as well as the content of these substances, are presented.