measurement of coating thickness on sheet_metal
DESCRIPTION
MProbe VisHR (http://semiconsoft.com/html/download/brochure/MProbeVisVisHR_brochure2014.pdf) is used to measure coating thickness of sheet metal. Typical coatings includes, anti-finger, anti-rust and oil coatingTRANSCRIPT
83 Pine Hill Rd. Southborough, MA 01772 Phone +1.617.388.6832 Fax. +1.508.858.5473
email: [email protected] http://www.semiconsoft.com
Thin Film Measurement solution Software, sensors, custom development and integration
Measurement of coatings on sheet metal.
Varieties of specialized coatings are deposited in the sheet metal production.
Some of the most common are anti-rust, anti-finger and oil coating. Traditionally, the thickness of these coating is being measured using IR absorption. This method has two serious limitations: sensitivity to the thin films (<2 μm) is low and substrate color variation can affect the measurement results. MProbe system is free from above limitation and can easily measure thickness in these applications Example 1. Measurement of anti-rust coating thickness on zinc-dipped steel sheet. Measurements were done using MProbe VisHR system in 700-1000nm range.
Fig.1 Measurement of the thin anti-rust coating. Fit of the model to measured data Thickness 1.33µm
83 Pine Hill Rd. Southborough, MA 01772 Phone +1.617.388.6832 Fax. +1.508.858.5473
email: [email protected] http://www.semiconsoft.com
Fig.2 Measurement of the thick anti-rust coating. Peak position indicates film thickness Thickness: 10.35µm
83 Pine Hill Rd. Southborough, MA 01772 Phone +1.617.388.6832 Fax. +1.508.858.5473
email: [email protected] http://www.semiconsoft.com
Example 2. Measurement of the anti-finger film on stainless steel. The measurements were taken using MProbe Vis system (400nm -1000nm wavelength range)
Fig. 3 Reflectance spectra of two samples. Reflectance spectra are offset due to a different reflectivity of the substrate. However, the film thickness are almost the same (1.943 μm and 1.945 μm). Using IR absorption will yield significantly different results…
83 Pine Hill Rd. Southborough, MA 01772 Phone +1.617.388.6832 Fax. +1.508.858.5473
email: [email protected]
Fig. 4 Results of the measurement. Thickness:1945nm
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