Designation: D – 02 Standard Test Methods for Measuring Adhesion by Tape Test1 This standard is issued under the?xed designation D. ASTM D Uploaded by. Leonardo Gonçalves. Loading Preview. Sorry, preview is currently unavailable. You can download the paper by clicking the. ASTM D Pull Off Test Standard. Uploaded by. vlong ASTM D MEK Test (Zinc Test). Uploaded by. vlong ASTM D Eng Cross-cut.
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Procedure for X-CUT TAPE TEST METHOD-ASTM D3359-02
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. The color under the tape is a useful indication of when good contact has been made. Cohesive failure within the coating?
This standard is subject to revision at any time by the responsible technical committee and must be reviewed every? These effects are related as they re? NOTE 2—It should be recognized that differences in adherability of the coating surface can affect the results obtained with coatings having the same inherent adhesion.
Users of it should, therefore, check whether current material gives comparable results to previous supplied material.
Precision and Bias 9. The unique functional requirements of coatings on plastic substrates cause the usual tape tests to be unsatisfactory for measuring adhesion performance in practice.
For large structures make sufficient tests to ensure that the adhesion evaluation is representative of the whole surface. This standard has been approved for use by agencies of the Department of Defense.
If the adhesion strength of the tape has not been determined, report the speci? Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters.
Variation in pull rate and peel angle can effect large differences in test values and must be minimized to assure reproducibility 9. 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 color under the transparent tape is a useful indication of when good contact has been made.
Criteria deemed essential for a test to warrant large-scale acceptance are: Also, because tapes change on storage, bond strengths of the tape may change over time 7, 8. If the substrate has not been reached make another X in a different location.
These test methods were designed for relatively ductile coatings applied to metal substrates, not for coatings often brittle applied to plastic parts 7. For coatings on soft substrates, issues include how deep should this cut penetrate, and is it possible to cut only to the interface? The manufacturer of this tape and the manufacturer dd the tape used in the interlaboratory study see RR: When making the incisions, use the straightedge and cut through the coating to the substrate in one steady motion.
To ensure good contact with the? Also, Test Method B is not considered suitable for? Dhave advised f subcommittee that the properties of these tapes were changed. Although some rather brittle coatings may exhibit cohesive failure, the tape test adhesion method does not make 3359-002 for giving failure locality 7, 8.
NOTE 4—Coatings 33590-2 be applied in accordance with Practice Dor as agreed upon between the purchaser and the seller.
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 – 02 standard test methods for_百度文库
When making successive single cuts with the aid of a guide, place the guide on the uncut area. D — 02 results with the adhesion rating s.
One supplier that has assisted in the re? It is not unexpected that different operators might obtain different results 7, 8.
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 aatm unexpected error in assessing adhesion. A superscript epsilon e indicates an editorial change since the last revision or reapproval.
The conditions and time of exposure will be governed by ultimate coating use or shall be agreed upon between the purchaser and seller. Extremes in temperature or relative humidity may affect the adhesion of the tape or the coating.
Do not attempt to deepen a previous cut as this may affect adhesion along the incision. In its simplest version a piece of adhesive tape is pressed against the paint? 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 33359-02 7, 8.
Apparatus and Materials Thus both tensile and compressive forces are involved in adhesion tape testing. Do not attempt to deepen a previous cut as this may affect adhesion along the incision.
The central issues are that the test on plastics lacks reproducibility and does not relate to the intended application. What are the hazards of powder coatings? If this is not possible the test method should be used only for ranking a series of test coatings.
Adhesion is then rated by comparing? 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 astk. Precision and Bias 8 Both concerns are well founded: Apparatus and Materials 5. More importantly, in this instance the test is being applied beyond its intended scope.