Page 45 - Liquid Penetration Inspection

Diploma in Mechanical Engineering (Material)

LIQUID PENETRATION INSPECTION

www.pis.edu.my

Principles of liquid penetrant inspection

1. Temperature control

2. Penetrant quality control

3. Dwell quality control

4. Emulsifier path quality control

5. Wash quality control
Lipophilic emulsifiers mix with penetrants but when the

6. Drying process quality control
concentration of penetrant contamination in the emulsifier

7. Developer quality control
becomes too great, the mixture will not function effectively
as a remover. Standards require that lipophilic emulsifiers

be capable of 20% penetrant contamination without a

reduction in performance.

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