Liquid Penetrant Testing

Question 1

pt advantages

Answer 1

Advantages:
a.) It has a relatively low cost.
b.) It is very portable.
c.) Is quick and easy to test.
d.) Are sensitive to fine surface cracks.

Question 2

PT disadvantages?

Answer 2

Disadvantages:
a.) Parts that are being tested must be exceedingly clean and dry.
b.) Liquid Penetrant Testing cannot detect sub-surface defects.
c.) It is very difficult to test on porous materials
d.) PT is used to locate discontinuities based on its capillarity action, which are the ability of a liquid to be drawn into a discontinuity and to be drawn out during the developing phase.

Question 3

Steps of PT?

Answer 3

1. Surface Preparation(pre Cleaning )
   2.Penatrent application
   3.Dwell Time PT
2. Removal of excess penetrant
   5.Developer application
   6.Developer Dwell time
   7.Remove excess Developer
   8.Evaluation
   9.Post Cleaning