Improvement of penetrant-testing methods

A study has been made of the influence of different factors (characteristics of technological stages of testing, roughness of the tested surface, and thermal effects) on the sensitivity and efficiency of nondestructive-penetrant-testing methods. Facilities for quantitative evaluation of the sensitivity of sets of flaw-detector materials and indicator liquids and the technological regime of testing with blowing of the tested surface with warm air, in which the sensitivity and efficiency of flaw detection of penetrant-testing methods increase significantly, have been developed.