Adhesion
Pull-Off Test

Pull-Off Test in Progress

ATS performs many test methods for analyzing coatings, including ASTM adhesion pull testing. We provide accurate test results in a quick turn-around time.

Why use Coatings?

Coatings are used to protect equipment (especially outdoor equipment) from environmental hazards like moisture and salinity. Unprotected equipment stands likely to fail sooner due to corrosion than pieces outfitted with a solid, unbroken coating. That said, not all coatings adhere to their substrates in the same way, due to the various chemical reactions that occur between the initial application and the finished product.

Many companies subject their products and equipment to adhesion testing to make sure that their coating will remain intact and effective. Third-party testing companies, like Applied Technical Services, Inc., will use methods like the adhesion pull test to analyze the effectiveness of your coatings.


What is Adhesion, exactly?

Adhesion is a qualitative value that expresses how well the coating stuck to its substrate. This can be used to find the failure point of the coating, a quantifiable value that conveys the amount of force needed to separate the coating from its substrate. The adhesion pull test is a popular method of testing both a coating’s adhesion and failure point.

About the Method

Although applicable to almost any type of coating, the method can only be performed on a flat sample due to the procedure involved; a technician glues an object (known as a dolly or stud) onto the coating, and uses a machine to pull on it at a perpendicular angle while applying increasing, uniform pressure.

Depending on the type of desired results, the machine will either pull until the stud detaches completely (to determine the absolute failure point) or stop when it reaches a predetermined force without causing breakage to the surface layer of the coating (to apply a pass/fail judgment according to industry standards).

The process is covered in more detail by ASTM standard D4541 and ISO standard 4624. ATS’ technicians are thoroughly experienced in performing this test method to both of the above, internationally recognized standards.


ATS and Adhesion Testing

For over 50 years, ATS has provided esteemed testing, engineering consulting, and inspection services to clients from a variety of industries. Our technicians perform two other types of adhesion testing as appropriate for the circumstances, and our lab offers nearly two dozen other testing methods (for which we are A2LA accredited) related to coatings. ATS offers accurate results within a quick turn-around window because of our finely calibrated tools handled by veteran technicians. Our lab is particularly qualified to handle your adhesion testing needs – find out what we can do for you today.

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