Page 49 - Liquid Penetration Inspection

Diploma in Mechanical Engineering (Material)

LIQUID PENETRATION INSPECTION

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Principles of liquid penetrant inspection

The function of the developer is very important in a
1. Temperature control
penetrant inspection. In order to accomplish its functions, a

2. Penetrant quality control
developer must adhere to the part surface and result in a
3. Dwell quality control
uniform, highly porous layer with many paths for the

4. Emulsifier path quality control
penetrant to be moved due to capillary action. Developers
are either applied wet or dry, but the desired end result is
5. Wash quality control

always a uniform, highly porous, surface layer.
6. Drying process quality control

7. Developer quality control

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