Liquid Penetrant Testing

Liquid Penetrant Testing

Surface-breaking defects in products can mean a shut down in production and a loss of revenue.
To help you stay up and running, as part our defect testing services, TÜV Rheinland provides liquid penetrant testing, an inspection method used to locate surface defects in all types of materials – metals, plastics, or ceramics. It can be applied to all non-ferrous materials and ferrous materials.

Benefits at a Glance

Using TÜV Rheinland liquid penetrant testing services, you get:

  • Lower cost compared to other methods
  • Fast turnaround time
  • TÜV Rheinland’s exclusive one stop service

Our Services for Liquid Penetrant Inspection

Our liquid penetrant inspection follows this simple procedure:

  • A liquid with high surface-wetting characteristics is applied to the part’s surface and is given enough time to seep into surface defects.
  • The excess liquid is removed from the part’s surface.
  • A developer is applied to pull the trapped penetrant out of the defects and spread it on the surface where it can be seen.
  • A visual inspection is performed.
  • The penetrant used can be loaded with a fluorescent dye, and the inspection is done under UV light to increase test sensitivity.

Products Covered

Liquid penetrant testing services are for machinery, parts and components in the automotive, casting, and forging industries. Liquid penetrant testing can also be done in the field as well.