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topic 7566

Measuring Anodic Coating Thickness


We manufacture audio equipment and we buy the anodized aluminum faceplate from several vendors. I would like to know how to measure thickness of anodic coating. Is there any easy way? If a tool/equipment is required, could someone advise make/model?

Sittichai Viriyayudhakorn
-Bangkok, Thailand


There are a number of instruments for measuring anodic coating thickness, Eddy Current, X-Ray etc...I prefer one brand (Fischer Instruments) but there are a number of internationally accepted companies.

Bill Grayson
- Santa Cruz, California, USA


This can be done with FTIR in reflectance mode also quite quickly and easily once a calibration is done. Really what you get is coating weight though.

Terry Tomt
- Auburn, Washington

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