ASTM D assesses the adhesion of film coatings to metallic substrates by applying and removing pressure-sensitive tape over cuts made in the film. Documents Similar To ASTM D Eng Cross-cut. ISO Uploaded by. Quang Duan Nguyen · ISO Uploaded by. Anonymous n4bJbeLAq. This product is ASTM D compliant. Proven to be a very close equivalent to the Permacel P99 tape which was withdrawn from production by the.
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atm But it can also be said that it is possible to obtain an indication of relative adhesion performance. After drying or testing the coating, conduct the report the results with the adhesion rating s.
ASTM D 3359 – 09 Standard Test Methods for Measuring Adhesion by Tape Test
However, with the tape test, failures within the substrate or coating layers are rare because the tape adhesive is not usually strong enough to exceed the cohesive strengths of normal substrates and organic coatings.
This standard has been approved for use by agencies of the Department of Defense. The last approved version of this historical standard is referenced Films. The color under the tape is a useful indication of when good contact has been made.
Criticism of these tests arises when they are used to quantify the strength of adhesive bonding. Your comments will receive careful consideration at a meeting of the d33559-09 technical committee, which you may attend. Note 3—It should be recognized that differences in adherability of the coating surface can affect the results obtained with coatings having the same inherent adhesion. After drying or testing the coating, conduct the tape test at room temperature as dened in Specication Dunless D standard temperature is required or agreed.
Also, Test Method B is adtm considered suitable for lms thicker than 5 mils m. Asgm D cross h A given lot may surpass these standards and thus be suitable for general market distribution; however, such a lot may be a source of serious and unexpected error in assessing adhesion. Direct tests include the Hesiometer and the Adherometer 2. As Mittal 1 10 has pointed out, the answer is both yes and no.
d3359-9 More importantly, in this instance the test is being applied beyond its intended scope. Rate the adhesion in accordance with the following scale illustrated in Fig. Users of it should, therefore, check whether current material x3359-09 comparable results to previous supplied material. The limited scale of 0 to 5 was xstm deliberately long that intersect near their middle with a smaller angle of to avoid a false impression of being sensitive.
By design it was made as simple as possible to perform, and requires a minimum of specialized equipment and materials that must meet certain specications. Precision and Bias for two measurements. Dhave advised this subcommittee that the properties of these tapes were changed. It is of particular importance that the cutting cut as this may affect adhesion along the incision.
Adhesive ASTM D3359 Cross Hatch Adhesion Test Tape | Elcometer 99
Further, the tape test does not give an absolute value for the force required for bond rupture, but serves only as an indicator that some minimum value for bond strength was met or exceeded 7, 8. A number in parentheses indicates the year of last reapproval. If testing coatings on non-metallic substrates, either Test Method A or Test Method B may be more appropriate and the method employed should be discussed by interested parties.
Also, because tapes change on storage, bond strengths of the tape may change over time 7, 8. Because of the variability in adhesion strength from batch-to-batch and with time, it is essential that tape from the same batch be used when tests are to be run in different laboratories.
Test Methods D was developed with metal wstm the substrate and, in the absense of supporting precision and bias data, is so limited.
ASTM D – 09 Standard Test Methods for Measuring Adhesion by Tape Test
The limited scale of 0 to 5 was selected deliberately to avoid a false impression of being sensitive. This standard has been approved for use by agencies of the Department of Defense.
Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address ast, at phonefax xstm, or service astm. Because the substrate and its surface preparation or lack thereof have a drastic effect on the adhesion of coatings, a method to evaluate adhesion of a coating to different substrates or surface treatments, or of different coatings to the same substrate, is of considerable usefulness in the industry.
Since an intact lm with appreciable adhesion is frequently not removed at all, the severity of the test is usually enhanced by cutting into the lm a gure X or a cross hatched pattern, before applying and removing the tape. After immersion, clean and wipe the surface with astk appropriate solvent which will not harm the integrity of the coating.