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.
|Published (Last):||4 January 2013|
|PDF File Size:||2.95 Mb|
|ePub File Size:||13.83 Mb|
|Price:||Free* [*Free Regsitration Required]|
One supplier that has assisted in the re? 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 and unexpected error in assessing adhesion. It should be noted, however, that multitip cutters10 provide good results only on test areas sufficiently plane that all cutting edges contact the substrate to the same degree.
By design it was made as simple as possible to perform, and requires a minimum of specialized equipment and materials that must meet certain speci?
There generally is difficulty, however, in relating these tests to basic adhesion phenomena. When making successive single cuts with the aid of a guide, place the guide on the uncut area. atm
ASTM D | Leonardo Gonçalves –
If this is not possible the test method should be used only for ranking a series of test coatings. ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. 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.
Extremes in temperature or relative humidity may affect the adhesion of the tape or the coating. The color under the tape is a useful indication of when good contact has been made. For large structures make sufficient tests to ensure that the adhesion evaluation is representative of the whole surface. 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 below.
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 reasonable to state that at the present time no test exists that can precisely assess the actual physical strength of an adhesive bond. Standard Test Method f Current edition approved Aug. The central issues are that the test on plastics lacks reproducibility and does not relate to the intended application.
They do not distinguish between higher levels of adhesion for which more sophisticated methods of measurement are required. For tests in the? The unique functional requirements of coatings on plastic substrates cause the usual tape tests to be unsatisfactory for measuring adhesion performance in practice.
If the substrate has not been reached make another X in a different location. Originally published as D — Both concerns are well founded: Cohesive failure within the coating?
When making the incisions, use axtm straightedge and cut through the coating to the substrate in one steady motion. Precision and Bias 9. But it can also be said that it is possible to obtain an indication of relative adhesion performance. Also, because tapes change on storage, bond strengths of the tape may change over time 7, 8. Smooth the tape into place by?
Users of it should, therefore, check whether current material gives comparable results to previous supplied material. In actuality, however, this force is distributed over a discrete distance O-A in Fig. But this, in fact, is not their purpose. The values given in parentheses are for information only.
For multicoat systems where adhesion failure may occur between or within coats, the adhesion of the coating system to the substrate is not determined. Then dry or prepare the surface, or both, as agreed upon between the purchaser and the seller.
Criteria deemed essential for a test to warrant large-scale acceptance are: Rate the adhesion in accordance with asmt following scale illustrated in Fig.
For example, when the peel removal force of the tape from the coating used earlier by Task Group D This standard is subject to revision at any time by the responsible technical committee and must be reviewed every? Discard cutting tools that develop nicks or other defects that tear the film.
NOTE 5—If desired or speci? Variation in pull rate and peel angle can effect large differences in test values and must be minimized to assure reproducibility 9.
Common methods which approach the direct tests are peel, lapshear, and tensile tests. 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.
The conditions and time of exposure will be governed by ultimate coating use or shall be agreed upon between the purchaser and seller. 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.
Procedure for X-CUT TAPE TEST METHOD-ASTM D3359-02
The manufacturer of this tape and the manufacturer of the tape used in the interlaboratory v see RR: However, the precision values given in These test methods were designed for relatively ductile coatings applied to metal substrates, not for coatings often brittle applied to plastic parts 7.
Although some rather brittle coatings may exhibit cohesive failure, the tape test adhesion method does not make provision for giving failure locality 7, 8. If the metal has not been reached make another grid in a different location. Summary of Test Methods 3. For tests in the field, ensure that the surface is clean and dry.