Page 46 - Liquid Penetration Inspection
P. 46
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
Hydrophilic emulsifiers have less tolerance for penetrant
6. Drying process quality control
contamination. The penetrant tolerance varies with
7. Developer quality control
emulsifier concentration and the type of contaminating
penetrant. In some cases, as little as 1% (by volume)
penetrant contamination can seriously affect the
performance of an emulsifier.
peneraju • ilmu • sejagat
