Operational Steps

Question 1

1. Pre-cleaning

Answer 1

Removal of any contaminates
Cleaning Methods:
Vapor degreasing
Solvent cleaning
Alkaline cleaning
Water/detergent cleaning
Steam cleaning
Ultrasonic cleaning
Chemical cleaning (etching or acid/alkaline baths)
Mechanical cleaning

Question 2

2. Penetrant Application

Answer 2

Penetrant is applied to a part under test in a manner appropriate to the type of part

Question 3

3. Excess Penetrate Removal

Answer 3

Removal of penetrant from the surface

Question 4

Application of Developer

Answer 4

Application of developer can be spraying, dipping, or immersion depending on the developer used

Question 5

5. Inspection and Interpretation

Answer 5

The part shall be inspected and any discontinuities interpreted and evaluated to the applicable acceptance codes, standards, or specifications.

Question 6

6. Post Cleaning

Answer 6

The developer and any remaining penetrate materials shall be removed after interpretation

Question 7

Unacceptable surface preparation and processes

Answer 7

Shot peening
Shot blasting
Sand blasting
Power wire brushes

Question 8

Penetrant Dwell time

Answer 8

The penetrant is left on the surface for a sufficient time to allow as much penetrant to be drawn into a defect. Dwell time is found in the inspection procedures. Minimum shall 5-30 minutes. For temps between 40-50F, dwell time shall be a minimum of 20 minutes