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Testing adhesion of multi-coat systems

From JPCL, October 2013

More items for Quality Control

When should the adhesion of an applied coating or lining multi-coat system be tested?...
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Tagged categories: Adhesion; Certifications and standards; Coating failure; Site/field testing

Comment from pratap kumar g, (11/26/2013, 5:19 AM)

can u differenciate rust and rust scale

Comment from Mark Collins Jr, (6/26/2014, 11:37 AM)

We were required to do an adhesion test for a client on about 9 vessels. All vessels were new construction and the coating system was the standard IOZ, Epoxy, Polyurethane 3 coat system. The products specified have been used for various projects for the same client before. We had to prepare 3 test panels of the same material the vessels were constructed of and apply the coating system in steps. Panel 1 just IOZ. Panel 2 IOZ and Epoxy. Panel 3 all coats of the system. Each panel needed to have a minimum pull of of about 725 psi. Has anyone ever done anything like this on new construction?

Comment from milagros morantes, (7/10/2014, 5:11 PM)

I am in similar situation. But, I’m going to perform adhesion test by ASTM D3359 method B in the Panel 1 (only IOZ) and ASTM D3359 method A and ASTM 6677 in panel 2 (IOZ+Epoxy) and panel 3 (IOZ+Epoxy+Polyurethane). It's also new construction. I'd like to know if anyone has a done this before.

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