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In the paint and coating industries, paint adhesion testing is often used to determine if the paint or coating will adhere properly to the substrates to which they are applied. Several tests measure the resistance of paints and coatings from substrates: cross-cut test, scrape adhesion, pull-off test , and others.
A test patch should be as clean as possible. Contamination of a patch can influence the results significantly. Bresle patch injected with 15ml water as in ISO 8502-6 Annex A. The ISO 8502-6 standard prescribes in annex A that certified patches shall be used. This annex describes a stress test to ensure patch adhesion and wash ability.
A pull-off test, also called stud pull test, is a type of test in which an adhesive connection is made between a stud and a carrier (or object to be tested) by using a glue, possibly an epoxy or polyester resin, that is stronger than the bond that needs to be tested.
ASTM provides standards for paint adhesion testing which provides qualitative measures for paints and coatings resistance to delamination from substrates. Tests include cross-cut test, scrape adhesion, [13] and pull-off test. [14]
The PSA industry is in the process of unifying the several standards presently in use. The most active organizations are: ISO International Organization for Standardization : A European AFNOR committee is currently active in the definition of international standards; some of the most common test methods, such as Peel Adhesion, Static Shear ...
In adhesion tests per ASTM D4541, in which an aluminum stud is bonded to the test surface and the stud is pulled in the direction normal to the surface, both surfaces of the failure interface were analyzed by X-ray photoelectron spectroscopy (XPS). F/C ratio was used as an indicator of the failure mode: F/C of zero corresponds to failure in the ...
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Adhesives are sometimes used as load bearing and sealing joints, which points great stress on them. In accelerated testing, factors like the temperature, moisture, vibrations, voltage, and UV light are greatly increased over a short period so long term predictions can be made about the effect of the aforementioned factors. [1] [2]
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