THICKNESS TESTING OF 316 L COATING
02-02-2007, 01:13 PM
|THICKNESS TESTING OF 316 L COATING
Which is the best metod to check thickness of arc sprayed 316L coating on mild steel substrate
02-02-2007, 04:14 PM
|RE: THICKNESS TESTING OF 316 L COATING
The best way would be to physically measure thickness with a micrometer or vernier type instrument. Using electronic devices (see quote from another thread) will have problems with this combination of coating and substrate. You may initially think that a non-magnetic 316 stainless steel wire would produce a non-magnetic coating and thus be suitable for measurement using a magnetic method as you would with a zinc coating. Unfortunately, 316 stainless often becomes slightly magnetic after spraying. The magnetic testing method can be used, but you need to be very careful to calibrate the instrument using known coating samples and not just relying on the plastic calibration shims.
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