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 Proven to be a very close equivalent to the Permacel P99 tape which was withdrawn from production by the.
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Adhesion is then rated by comparing lm removed against an established rating scale. It is the responsibility of the user of this standard to establish appropriate safety and health d335909 and determine the applicability of regulatory limitations prior to use.
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.
For multicoat systems where adhesion failure may occur between or within coats, the adhesion of the coating system to the substrate is not determined.
The intra- and immersion, clean and wipe the surface with an appropriate inter-laboratory precision of this test method is similar to other solvent which will not harm the integrity of the coating.
The limited scale of 0 to 5 was selected deliberately long that intersect near their middle with a smaller angle of to avoid a false impression of being sensitive. There generally is difficulty, however, in relating these tests to basic adhesion phenomena. The coating has aked along the edges and on parts of the squares.
ASTM D 3359 – 09 Standard Test Methods for Measuring Adhesion by Tape Test
It is of particular importance that the cutting cut as this may affect adhesion along the incision. The unique functional requirements of coatings on plastic astj cause the usual tape tests to be unsatisfactory for measuring adhesion performance in practice.
The values given in parentheses are for information only. Approved February 1, Issues with plastic substrates are noted in Appendix X1. Dd3359-009 advised this subcommittee that the properties of these tapes were changed. Link to Active This link will always route to the current Active version of the standard. It is assumed that coating removal occurs when the tensile force generated along the latter interface, which is a function of the rheological properties of the backing and adhesive layer materials, is greater than the bond strength at the coating-substrate interface or cohesive strength of the coating.
Furthermore, atm test methods do 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 12. Rate the adhesion in accordance with the following scale illustrated in Fig.
Further, the tape test does not give an absolute value for the force required ast bond rupture, but serves only as an indicator that some minimum value for bond strength aetm met or exceeded 7, 8. If the substrate has not been reached make another X in a different location. 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.
Adhesive ASTM D3359 Cross Hatch Adhesion Test Tape | Elcometer 99
Major limitations of the tape adtm 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. Your comments will receive careful consideration sstm a meeting of the responsible technical committee,1 which you may attend.
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. If you are aware of alternative suppliers, please provide this used while making individual cuts and examining the test area.
Users of it should, therefore, check whether current material gives comparable results to previous supplied material. The nal step in the test is visual assessment of the coating removed from the specimen, which is subjective in nature, so that the coatings can vary among individuals evaluating the same specimen 9. Extremes in temperature or relative humidity 4. This standard is subject to revision at any time by the responsible technical committee and must be reviewed every ve years and if not revised, either reapproved or withdrawn.
Users shall not use intermediate values for ranking adhesion tests within this method. For large structures make sufficient tests to ensure that the 5 Permacel 99, manufactured by Permacel, New Brunswick, NJand adhesion evaluation is representative of the whole surface.
They do not distinguish between higher levels of adhesion for which more sophisticated methods of measurement are required.
Remove an additional length at a steady 5. The manufacturer of this tape and the manufacturer of the tape used in the interlaboratory study see RR: Also, because tapes change on storage, bond strengths of the tape may change over time 7, 8. 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.
Criteria deemed essential for a test to warrant large-scale acceptance are: Precision and bias data on the latter is lacking. The values given in parentheses are for information only. The intra- and inter-laboratory precision of this test method is similar to other widely-accepted tests for coated substrates for example, Test Method D and Test Method Dbut this is partly the result of it being insensitive to all but large differences in adhesion.
Test Specimens dance with the following scale: Direct tests include the Hesiometer and the Adherometer 2.