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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After wstm, clean and wipe the surface with an appropriate solvent which will not harm the integrity of the coating. Both concerns are well founded: If the peel angle and rate vary, the force required to remove the tape can change dramatically.
Originally published as D — When making the incisions, use the straightedge and cut through the coating to the substrate in one steady motion.
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. In its simplest version a piece of adhesive tape is pressed against the paint?
Extremes in temperature or relative humidity may affect the adhesion of the tape or the coating. Further, the tape test does not give an absolute value for the force required for bond rupture, but serves only asrm an indicator that some minimum value for bond strength was met or exceeded 7, 8.
More importantly, in this instance the test is being applied beyond its intended scope. NOTE 5—If desired or speci? NOTE 4—Coatings should be applied in accordance with Practice Dor as agreed upon between the purchaser and the seller. Criticism of these tests arises when they are used to quantify the strength of adhesive bonding.
Rate the adhesion in accordance with the following scale illustrated in Fig. When making the incisions, use the straightedge and cut through the coating to the substrate in one astn motion. These test methods were designed for relatively ductile coatings applied to metal substrates, not for coatings often brittle applied to plastic parts 7.
Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend.
Remove an additional asttm at a steady that is, not jerked rate and cut a adtm about 75 mm 3 in. If the metal has not been reached make another grid in a different location. Cohesive failure within the coating? For large structures make sufficient tests to ensure that the adhesion evaluation is representative of the whole surface. The central issues are that the test on plastics lacks reproducibility and does not relate to the intended application. A number in parentheses indicates the year of last reapproval.
However, the precision values given in Your comments will receive careful consideration at a meeting of the responsible technical committee,1 which you may attend. For coatings on soft 335-902, issues include how deep should this cut penetrate, and is it possible to cut only to the interface?
It is assumed that coating ast 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 or cohesive strength of the coating. Discard cutting tools that develop nicks or other defects that tear the film.
D5 Creation Powered by: A superscript epsilon e indicates an editorial change since the last revision or reapproval. For tests in the field, ensure that the surface is clean and dry.
In actuality, however, this force is distributed over a discrete distance O-A in Fig.
Precision and Bias 9. Then dry or prepare the surface, or both, as agreed upon between the purchaser and the seller. 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.
Procedure for X-CUT TAPE TEST METHOD-ASTM D3359-02
If the adhesion strength of the tape has not been determined, report the specific tape used and its manufacturer. Remove an additional length at a steady that is, not jerked rate and cut a piece about 75 mm 3 in. Adhesion is then rated by comparing? 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. Users of it should, therefore, check whether current material gives comparable results to previous supplied material.
The color under the transparent tape is a useful indication of when good contact has been made.
Procedure for A-X-CUT TAPE TEST METHOD-ASTM D
If the substrate has not been reached make another X in a different location. The unique functional requirements of coatings on plastic substrates cause the usual tape tests to be unsatisfactory for measuring adhesion performance in practice.
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. If 3359-022 is not possible the test method should 33590-2 used only for ranking a series of test coatings.