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NOTE 1—This test method has been reported being used to measure adhesion of organic coatings on soft substrates for example, wood and plastic.
ASTM D – 08 Standard Test Methods for Measuring Adhesion by Tape Test
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.
Check for flatness with a straight edge such as that of the tempered steel rule Direct tests include the Hesiometer and the Adherometer 2. F Standard Specification for Driven Fasteners: As such, no single tape is likely to be suitable for testing all coatings. The color under the transparent tape is a useful indication of when good contact has been made. A similar test method, ISOpermits tests on soft substrates for example, wood and plaster. If the metal has not been reached make another grid in a different location.
It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
It is not unexpected that different operators might obtain different results 7, 8.
ASTM D 3359 – 09 Standard Test Methods for Measuring Adhesion by Tape Test
Issues with plastic substrates are x3359-08 in Appendix X1. If the peel angle and rate vary, the force required to remove the tape can change dramatically.
They do not distinguish between higher levels of adhesion for which more sophisticated methods of measurement are required. This standard has been approved for use by agencies of the Department of Defense. Contract Law in Higher Education. Do not attempt to deepen a previous cut as this may affect adhesion along the incision.
Also, Test Method B is not considered suitable for lms thicker than 5 mils m.
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.
Precision and bias data on the later is lacking. They do not distinguish between higher levels of adhesion for which more sophisticated methods of measurement are required. After drying or testing the coating, conduct the tape test at room temperature as defined in Specification D, unless D standard temperature is required or agreed.
ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard.
Precision and Bias5 9. If the adhesion strength of the tape has not been determined, report the specific tape used and its manufacturer.
Enter your account email address to request a password reset: Differences in tapes used can lead to different results as small changes in backing stiffness and adhesive rheology cause large changes asrm the tension area.
Issues with plastic substrates are noted in Appendix X1. Remember me for one month. Permission rights to photocopy the standard may also be secured from the ASTM website www. Extremes in temperature or relative humidity may affect the adhesion of the tape ashm the coating.
Register for a trial account. Justification for the cutting step is reasonable as cutting provides a free edge from which peeling can begin without having to overcome the cohesive strength of the coating layer.
Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility. Also, because tapes change on storage, bond strengths of the tape may change over time 7, 8. NOTE 1—This test method has been reported being used to measure adhesion aastm organic coatings on soft substrates for example, wood and plastic.
However, the precision values given in It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
Liberty University School of Education M. It is assumed that coating removal awtm 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.