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- Title
Integrated Electric Spark Testing of Continuity and Unacceptable Thinning of Dielectric Coatings.
- Authors
Syas'ko, V. A.; Litvinov, B. Ya.; Musikhin, A. S.
- Abstract
At present, the main method for detecting continuity defects in dielectric coatings is the electrospark method of nondestructive testing (NDT). However, minimum coating thickness requirements are applied to most modern coatings. It seems promising to carry out tolerance control of the testing of dielectric coatings in one technological process with control of their continuity due to changes in the existing testing methods and the method of forming the test voltage. Theoretical and experimental analysis of the processes of sparking occurring upon detection of through and nonthrough defects in dielectric coatings on electrically conductive substrates has been carried out. The minimum control voltages have been measured and calculated for the studied dielectric coatings, taking into account the detection of both through defects and unacceptable thinning. The application of a probabilistic approach to the detection of the above defects is proposed. It is shown that with a known value of the electrical strength of the coating, it is possible to detect both through and nonthrough defects with a calculated probability in coatings with a given test voltage.
- Subjects
ELECTRIC testing; NONDESTRUCTIVE testing; SURFACE coatings; DIELECTRICS; ELECTRIC spark; CONTINUITY; VOLTAGE control
- Publication
Russian Journal of Nondestructive Testing, 2022, Vol 58, Issue 9, p814
- ISSN
1061-8309
- Publication type
Article
- DOI
10.1134/S106183092209008X