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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Rate the adhesion in accordance with the following scale illustrated in Fig.
Although some rather brittle coatings may exhibit cohesive failure, the tape test adhesion method does not make provision for giving failure locality 7, 8. By design it was made as simple as possible to perform, axtm requires a minimum of specialized equipment and materials that must meet certain speci? Both concerns are well founded: Summary of Test Methods 3.
Procedure for A-X-CUT TAPE TEST METHOD-ASTM D
Smooth the tape into place by? For example, when the peel removal force of the tape from the coating used earlier by Task Group D 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.
Flaking and detachment worse than Grade 1. It is reasonable to state that at the present time no test exists that can precisely assess the actual physical strength of an adhesive bond. 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. When making the incisions, use the straightedge and cut through the coating to the substrate in one steady motion.
If the metal has not been reached make another grid in a different location. If the adhesion strength of the tape has not been determined, report the speci? ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. It is of particular importance that the cutting edges be in good condition.
Cohesive failure within the coating?
Extremes in temperature or relative humidity may affect the adhesion of the tape or the coating. Precision and Bias 8 9.
Thus both tensile aatm compressive forces are involved in adhesion tape testing. Discard cutting tools that develop nicks or other defects that tear the? If the substrate has not been reached make another X in a different location. When making successive single cuts with the aid of a guide, place the guide on the uncut area.
For coatings on soft substrates, issues include how deep should this cut penetrate, and is it possible to cut only to the interface? 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.
Common methods which approach the direct tests are peel, lapshear, and tensile tests. Differences in tapes used can lead to different results as small changes in backing stiffness and adhesive rheology cause large changes in the tension area.
ASTM D | Leonardo Gonçalves –
Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. For multicoat systems where adhesion failure may occur between or within coats, the adhesion of the coating system to the substrate is not determined. Discard cutting tools that develop nicks or other defects that tear the film.
The color under the tape is a useful indication of when good contact has been made. As Mittal 1 12 has pointed out, the answer is both yes and no.
Procedure for X-CUT TAPE TEST METHOD-ASTM D3359-02
One supplier that has assisted in the re? Apparatus and Materials 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 astn Test Method Dbut this is partly the 33599-02 of it being insensitive to all but large differences in adhesion.
Then dry or prepare the surface, or both, as agreed upon between the purchaser and the seller.