ASTM D – Designation: D – 08 Standard Test Methods for Measuring Adhesion by Tape Test. Buy ASTM D TEST METHODS FOR MEASURING ADHESION BY TAPE TEST from SAI Global. ASTM D Historical Standard: ASTM D Standard Test Methods for Measuring Adhesion by Tape Test. SUPERSEDED (see Active link, below).
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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. Land Use and Development. Key steps that directly reflect the importance of operator skill include the angle and rate of tape removal and the visual assessment of the tested sample. 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.
If this is not possible the test method should be used only for ranking a series of test coatings. Major limitations of the tape test are its low sensitivity, applicability only to coatings of relatively low bond strengths, and non-determination of adhesion to the substrate where failure occurs within a single coat, as when testing primers alone, or within or between coats in multicoat systems.
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. However, the precision values given in Cut through the lm to the substrate in one steady motion using just sufficient pressure on the cutting tool zstm have the cutting edge reach the substrate.
It is the responsibility of the user of this standard to establish appropriate safety d359-08 health practices and determine the applicability of regulatory limitations prior to use. Last previous edition approved in as D — Applied to metals, it is economical to perform, lends itself to job site application, and most importantly, after decades of use, people feel comfortable with it.
Link to Active This link will always route to the current Active version of the standard. Although some rather brittle coatings may exhibit cohesive failure, the tape test adhesion method does not make provision for giving failure locality 7, 8.
Both test methods are used to establish whether the adhesion of a coating to a substrate is at an adequate level; however they do not distinguish between higher levels of adhesion for which more sophisticated methods of measurement are required.
These test methods were designed for relatively ductile coatings applied to metal substrates, not for coatings often brittle applied to plastic parts 7.
ASTM D Measuring Adhesion by Tape Test
Current edition approved Feb. These test methods were designed for relatively ductile coatings applied to metal substrates, not for coatings often brittle applied to plastic parts 7. Users shall not use intermediate values for ranking adhesion tests within this method.
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. Extremes in temperature or relative humidity may affect the adhesion of the tape or the coating. But this, in fact, is not their purpose.
Rate the adhesion in accordance with the following scale illustrated in Fig. If the metal has not been reached make another grid in a different location. The accuracy and precision of the test result obtained by using these methods depends largely upon the skill of the operator and the operator’s ability to perform the test in a consistent manner. They do not distinguish between higher levels of adhesion for which more sophisticated methods of measurement are required.
The values given in parentheses are for information only. Precision and Bias5 If the metal has not been reached make another grid in a different location. When making the incisions, use the straightedge and cut through the coating to the substrate in one steady motion. NOTE 1—This test method has been reported being used to measure adhesion of organic coatings on soft substrates for example, wood and plastic. Do not attempt to deepen a previous cut as this may affect adhesion along the incision.
Individual reprints single or zstm copies of this standard may be obtained by contacting ASTM at the above address or at d3359-80faxor service astm. Major limitations of the tape test are its low sensitivity, applicability only to coatings of relatively low bond strengths, and non-determination of adhesion to the substrate where failure occurs within a single coat, as when testing primers alone, or within or between coats in multicoat systems.
ASTM D 3359 – 09 Standard Test Methods for Measuring Adhesion by Tape Test
xstm D — 08 Standard Test Methods for Measuring Adhesion by Tape Test1 This standard is issued under the xed designation D ; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision. Precision and Bias5 9.
Common methods which approach the direct tests are peel, lapshear, and tensile tests. Direct tests include the Hesiometer and the Adherometer 2. By design d3359-088 was made d33559-08 simple as possible to perform, and requires a minimum of specialized equipment and materials that must meet certain specifications.
As Mittal 1 9 has pointed out, the answer is both yes and no. As such, no single tape is likely to be suitable for testing all coatings.
Variation in pull rate and peel angle can effect large differences in test values and must be minimized to assure reproducibility 9. A similar test method, ISOpermits tests on soft substrates for example, wood and plaster. Apparatus and Materials 5. Note 2Subject to agreement between the purchaser and the seller, Test Method B can be used for thicker films if wider spaced cuts are employed. If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown below.
Because the substrate and its surface preparation c3359-08 lack of it 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 and treatment, is of considerable usefulness in the industry.