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):||16 October 2017|
|PDF File Size:||15.27 Mb|
|ePub File Size:||10.42 Mb|
|Price:||Free* [*Free Regsitration Required]|
Procedure for X-CUT TAPE TEST METHOD-ASTM D3359-02
D — 02 results with the adhesion rating s. These effects are related as they re? Rate the adhesion in accordance with the following scale illustrated in Fig.
These test methods were designed for relatively ductile coatings applied 3359-022 metal substrates, not for coatings often brittle applied to plastic parts 7. 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.
Smooth the tape into place by? 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.
Current edition approved Aug. Precision and Bias 8 The color under the transparent tape is a useful indication of when good contact has been made. But this, in fact, is not their purpose. After drying or testing the coating, conduct the tape test at room temperature as de? In its simplest version a piece of adhesive tape is pressed against the paint?
For large structures make sufficient tests to ensure that the adhesion evaluation is representative of the whole surface.
Adhesion is then rated by comparing? As Mittal 1 12 has pointed out, the answer is both yes and no.
However, with the tape test, failures within the substrate or coating layers are rare because the tape adhesive is not usually strong enough to exceed the cohesive strengths of normal substrates and organic coatings.
Originally published as D — Variation in pull rate and peel angle can effect large differences in test values and must be minimized to assure reproducibility 9. Criteria deemed essential for a test to warrant large-scale acceptance are: Thus both tensile and compressive forces are involved in adhesion tape testing.
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. 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.
Some commercial tapes are manufactured to meet minimum standards. Both concerns are well aatm Differences in tapes used can lead to different results as small changes in backing stiffness and adhesive rheology cause large 335-902 in the tension area.
It is of particular importance that the cutting edges be in good condition. When making successive single cuts with the aid of a guide, place the guide on the uncut area.
This standard has been approved for use by agencies of the Department of Defense. Also, because tapes change on storage, bond strengths of the tape may change over time 7, 8. If the 3359-022 has not been reached make another grid in a different location. Extremes in temperature or relative humidity may affect the adhesion of the tape or the coating. The central issues are that the test on plastics lacks reproducibility and does not relate to the intended application. Several factors that contribute to these differences include coating composition and topology: Summary of Test Methods 3.
For tests in the field, ensure that the surface is clean and dry.
astm d – 02 standard test methods for_百度文库
Criticism of these tests arises when they are used to quantify the strength of adhesive bonding. Applied to metals, it is economical to perform, lends itself to job site application, and most importantly, after decades of use, people feel comfortable with it.
This standard is subject to revision at any time by the responsible technical committee and must be reviewed every? After immersion, clean and wipe the surface with an appropriate solvent which will not harm the integrity of the coating.
In actuality, however, this force is distributed over a discrete distance O-A in Fig. 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.
Do not attempt to deepen a previous cut as this may affect adhesion along the incision.
There generally is difficulty, however, in relating these tests to basic adhesion phenomena. D5 Creation Powered by: NOTE 5—If desired or speci?
Procedure for A-X-CUT TAPE TEST METHOD-ASTM D
Users of it should, therefore, check whether current material gives comparable results to previous supplied material. One supplier that has assisted in the re? If the substrate has not been reached make another X in a different location. If the peel angle and 335-02 vary, the force required to remove the tape can change dramatically. For coatings on soft substrates, issues include how deep should this cut penetrate, and is it possible to cut only to the interface? Also, Test Method B is not considered suitable axtm