6.2 General: Non-destructive tests
Non-destructive test (NDT) methods provide information about defects in the bonded joint at the moment of testing.
Examples of NDT methods:
- Visible inspection
- Knock test
- Ultrasound test
- X-ray test
- Thermography
Classification of defects
![einteilung_defekte](https://leitfaden.klebstoffe.com/wp-content/uploads/2019/04/einteilung_defekte-1.png)