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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Apparatus and Materials 5. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend.
Last previous edition D — A superscript epsilon e indicates an editorial asm since the last revision or reapproval.
Because the substrate and its surface preparation or 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 2 3 1. 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.
Extremes in temperature or relative humidity may affect the adhesion of the tape or the coating.
After immersion, clean and wipe the surface with an appropriate solvent which will not harm the integrity of the coating. 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.
When making successive single cuts with the aid of a guide, place the guide on the uncut area. Several factors that contribute to these differences include coating composition and topology: 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.
These effects are related as they re?
ASTM D | Leonardo Gonçalves –
Then dry or prepare the surface, or both, as agreed upon between the purchaser and the seller. The unique functional requirements of coatings on plastic substrates cause the usual tape tests to be unsatisfactory for measuring adhesion performance in practice. NOTE 5—If desired or speci? If the peel angle and rate vary, the force required to remove the tape can change dramatically.
For large structures make sufficient tests to ensure that the adhesion evaluation is representative of the whole surface. 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.
Variation in pull rate and peel angle can effect large differences in test values and must be minimized to assure reproducibility 9. Then dry or prepare the surface, or both, as agreed upon between the purchaser and the seller.
Procedure for X-CUT TAPE TEST METHOD-ASTM D3359-02
D5 Creation Powered by: The conditions and time of exposure will be governed by ultimate coating use or shall be agreed upon between the purchaser and seller.
If the substrate has not been reached make another X in a different location. ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. The color under the tape is a useful indication of when good contact has been made.
Thus both tensile and compressive forces are involved in adhesion tape testing. Summary of Test Methods 3. For tests in the?
What are the hazards of powder coatings? More importantly, in this instance the test is being applied beyond its intended scope. Users of it should, therefore, check whether current material gives comparable results to previous supplied material. Criteria deemed essential for a test to warrant large-scale acceptance are: Posted in Powder Coating News Tags: Some commercial tapes are manufactured to meet minimum standards. To ensure 3359-02 contact with the? The values given in parentheses are for information only.
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 33559-02 cohesive strength of the coating.
If the adhesion strength of the tape has not been determined, report the specific tape used and its manufacturer. Direct tests include the Hesiometer and the Adherometer 2. Both concerns are well founded: Precision and Bias 8 9. Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm.
D — 02 results with the adhesion rating s. Standard Test Method f The central issues are that the test on plastics lacks reproducibility and does not relate to the intended application. For example, when asm peel removal force of the tape from the coating used earlier by Task Group D Discard cutting tools that develop nicks or other defects that tear the?
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.
When making the incisions, use the straightedge and cut through the coating to the substrate in one xstm motion. Key steps that directly re? Smooth the tape into place by finger in the area of the incisions and then rub firmly with the eraser on the end of a pencil.