Measure thickness of coating film on Zinc Plating Steel

[Khoa]

Hi All,

I'm searching for the possible method to determine organic coating thickness cover on steel tole was plated by thin zinc layer. Additionally, I also want to measure thickness zinc plating layer in between these layers (coating on top & steel on bottom) without destructing them.
Please kindly advice me a possible device to do this and How does this device work ?

Nice weekend!,

Khoa

 

[tech99]

I believe there is a magnetic device like a pen which will measure coating thickness.

 

[jim mcnamara]

This:
http://www.qualitymag.com/articles/...nd-coating-thickness-measurement-test-methods

talks about various methods for non-ferrous (organic, zinc, powders, etc) coating depth determinations on ferrous substrates.

@tech99 is talking about the devices that use ultrasound(I think, correct me if I'm wrong) - like this one
http://www.testequipmentdepot.com/extech/coating-thickness/cg204.htm