Page 44 - 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
Dwell times are usually recommended by the penetrant
5. Wash quality control
producer or required by the specification being followed.

The only real quality control required in the dwell step of the
6. Drying process quality control
process is to ensure that a minimum dwell time is reached.
7. Developer quality control

There is no harm in allowing a penetrant to dwell longer

than the minimum time as long as the penetrant is not

allowed to dry on the part.

peneraju • ilmu • sejagat