Powder Coating Tape Test

8 4 if the adhesion strength of the tape has been determined in accordance with test methods d 1000 or d 3330 report the results with the adhesion rating s.

Powder coating tape test.

A special pressure sensitive tape is then applied to the crosshatched area and then removed quickly at close to a 180 degree angle. Pull the tape off aggressively and look at the tape and the part. Generally the pass fail is graded on a progressive scale. Pressed down real good and then the tape is removed.

The most common areas to test for basic powder coating functionality are. The x cut tape test is primarily intended for use at job sites. Note 4 permacel p99 tape previously identified as suitable for this purpose was withdrawn from manufacture in july 2009. The more paint that is removed the worse the overall grade would be.

By far the most prevalent test for evaluating coating adhesion is the tape and peel test which has been used since the 1930 s. If a square or two of coating is removed adhesion can be. Apply any sticky tape then remove slowly. The x cut tape test and the cross hatch tape test.

No coating removal is a good pass. Last angle the tape at approximately 45 degrees then firmly holding the end of the tape give it a fast pull off the surface. If this is not possible the test method should be used only for ranking a series of test coatings. The test is performed by making a series of cuts through the coating.

In its simplest version a piece of adhesive tape is pressed against the paint film and the resistance to and degree of film removal observed when the tape is pulled off. This test is easy and a must for checking powder coating adhesion. Results should be no lifting of the cured powder between scribe lines. There are two variants of this test.

It s performed by cutting a crosshatched grid pattern into the coating all the way down to the substrate. That area is then judged to see if any paint was removed from the cross sections that were cut. 5 chemical resistance test astm d1308 place approximately 10 drops of test solvent consisting of 95 by weight toluene and 5 by weight methal ethyl keytone on the surface of the coating. An acceptable result will show only a little of the powder coming off from the grid cuts.

I usually test 2 3 surface areas on the specimen to determine an overall average. 8 3 for test panels report the substrate employed the type of coating the method of cure and the environmental conditions at the time of testing. Tapes and adhesion testing for powder coating. On metal substrates a more formal version of the knife test is the tape test.

The crosshatch test is designed to test the adhesion of the powder coating to the metal substrate. Allow to stand for 30 seconds.