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Find Hidden Flaws, Pits,
Leaks,Cracks & Defects 
 

Inspection Penetrant Glossary
What Inspection Penetrants Do
How to Choose an Inspection Penetrant
The Products
Inspection Penetrant Classifications

Standard References

Water Washable Penetrant Test
Post Emulsification Penetrant Test
Fluorescent Penetrant Applications

 
  How to Use Flaw Finder Inspection Penetrants  

 

 

WATER WASHABLE PENETRANT TEST

1. Clean parts by washing, degreasing or etching.  Dry
2. Apply inspection penetrant to the dry surface to be inspected
3. Remove Penetrant with Water
4. Apply developer (dry, water based or solvent based)
5. Inspect (Visible or black light depending upon penetrant type)
6. Final Cleaning

POST EMULSIFICATION PENETRANT TEST

1. Surface preparation, properly clean & dry
2. Apply inspection penetrant
3. Apply emulsifier on top of penetrant
4. Surface penetrant is emulsified
5. Remove emulsified penetrant with water spray
6. Apply developer to draw penetrant out of discontinuity
7. Black light causes indications to fluoresce when viewed in the dark
8. Final cleaning to remove penetrant, emulsifier and developer

 

RECOMMENDED FLUORESCENT (TYPE I) PENETRANT APPLICATIONS

Sensitivity Level Method Remover Developer Recommended
Applications/
Materials
1
Low
A Water Washable Water a - dry powder
b - water soluable
c - water suspendable
Aluminum, magnesium & sheet castings, except precision die castings
2
Medium
A Water Washable Water a - dry powder
b - water soluable
c - water suspendable
d - nonaqueous
All other parts except fracture & durability critical parts, super alloys, liquid oxygen compatible parts & machined forgings
B or D
Post Emulsified
Hydrophilic
Lipophilic
C Solvent Removable Solvent d - nonaqueous
3
High
A Water Washable Water a - dry powder Special applications including fracture and durability testing of critical parts, liquid oxygen compatible parts & materials & machined forgings
B or D
Post Emulsified
Hydrophilic
Lipophilic
a - dry powder
b - water soluable
C Solvent Removable Solvent d - nonaqueous
4
Ultra-High
A Water Washable Water b - water soluable
c - water suspendable
d - nonaqueous
Fracture & durability testing of critical parts, super alloys & machined forgings

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