Intro / Basics (1)

Question 1

What materials can be tested using LPI?

Answer 1

Metals
- Aluminium
- Titanium
- Copper
- Bronze
- Magnesium
- Iron
- Brass
Non Metals
- Ceramics
- Glass
- Plastics

Question 2

LPI Advantages

Answer 2

• inexpensive
• field portable
• ease of use and interpretation
• small discontinuities
• simple process

Question 3

LPI Disadvantages

Answer 3

• must be a surface defect
• extreme care when removing excess penetrant to not remove trapped penetrant
• pre-cleaning
• no porous parts
• time consuming
• temperature sensitive

Question 4

Oil and Whiting Method

Answer 4

• mid 1800s - 1930’s
• railways
• dark oils to penetrate defects
• cleaned and chalk powder was applied