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Coating and Wall Thickness Analysis

By imaging objects in 3D, X‑ray CT (computed tomography) can analyze coating and wall thickness distribution. Owing to its non-destructive nature, internal coatings and walls that cannot be accessed from the outside can be analyzed. This technique is applied to sub-micron to millimeter-thick walls and coatings, including golf ball shells, tablet coatings, bottle caps, foam cell walls, etc.
XCT metrology application golf ball
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How does it work?

Analysis procedure

The coating and wall thickness analysis involves the following steps:

  1. Obtain a CT scan of the object with coatings or walls.
  2. The surface of the coatings or walls is defined by the ISO-50 surface determination or image segmentation technique to generate a surface mesh.
  3. The thickness is calculated as the shortest distance between the two surfaces (for relatively uniform walls) or as the largest sphere that can fit between the walls (for irregularly shaped walls.)

Learning resources

To learn more about ISO-50 surface determination:

To learn more about general image segmentation:

To learn more about X‑ray micro-CT:

Coating and wall thickness application examples

Explore application examples to see if this technique can help you with your research or production challenges.

What is micro-CT?

How does it work? How much does it cost? Do I need It? What are the common problems?
To learn everything you need to know about micro-CT, you can start here: What is micro-CT?

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