ASTM D3359 08 PDF

ASTM D - 08 Standard Field Test Methods for Measuring Adhesion by Tape Test. Posted by Guideway Paint & Coating Defects at ASTM , 85 ASTM , 92 ASTM B, ,, , ASTM D, ASTM D, ASTM D, ASTM E, ASTM. ASTM D - 08 Standard Field Test Methods for Measuring Adhesion by Tape Test. Posted by Guideway Paint & Coating Defects at


ASTM D3359 08 PDF

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ASTM D3359 08 PDF

There generally is difficulty, however, in relating these tests to basic adhesion phenomena. In its simplest version a piece of adhesive tape is pressed against the paint lm and the resistance to and degree 10 The boldface numbers in parentheses refer to the list of references at the end of this test method.

Since an intact lm with appreciable adhesion is frequently not removed at all, the severity of the test is usually enhanced by cutting into the lm astm d3359 08 gure X astm d3359 08 a cross hatched pattern, before applying and removing the tape.

ASTM-D, -

Adhesion is then rated by comparing lm removed against an established rating scale. If an intact lm is peeled cleanly by the tape, or if it debonds just by cutting into it without applying tape, then the adhesion is rated simply as poor or very poor, a more precise evaluation of such lms not being within the capability astm d3359 08 this test.

Both test methods are used to establish astm d3359 08 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.

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 astm d3359 08 substrate where failure occurs within a single coat, as when testing primers alone, or within or between coats in multicoat systems.

  • ASTM D - 17 Standard Test Methods for Rating Adhesion by Tape Test
  • ASTM D - 08 Standard Test Methods for Measuring Adhesion by Tape Test
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For multicoat systems where adhesion failure may occur between or within coats, the adhesion of the coating system to the substrate is not determined. Applied to metals, astm d3359 08 is economical to perform, lends itself to job site application, and most importantly, after decades of use, people feel comfortable with it.

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 or cohesive strength of astm d3359 08 coating.

In actuality, however, this force is distributed over a discrete distance O-A in Fig.

ASTM D - 08 Standard Test Methods for Measuring Adhesion by Tape Test

A signicant compressive force arises from the response of the tape backing material to being stretched. Thus both tensile and compressive forces are involved in adhesion tape testing. Several factors that contribute to these differences astm d3359 08 coating composition and topology: Further, the astm d3359 08 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.

By design it was made as simple as possible to perform, and requires a minimum of specialized equipment and materials that must meet certain specications. Key steps that directly reect the importance of operator skill include the angle and rate of tape removal and the visual assessment of the tested sample.

ASTM D - 17 Standard Test Methods for Rating Adhesion by Tape Test

It is not unexpected that different operators might obtain different results 7, 8. If the peel angle and astm d3359 08 vary, the force required to remove the tape can change dramatically.

ASTM D3359 08 PDF

These effects are related as they reect certain rheological properties of the backing and adhesive that are molecular in origin. Variation in pull rate and peel angle can effect large differences in test values and must be minimized to assure reproducibility 9.

The nal step in the test is visual assessment of the coating removed from astm d3359 08 specimen, which is subjective in nature, so that the coatings can vary among individuals evaluating the same specimen 9.

Justication for the cutting step is reasonable as cutting provides a free edge from which peeling can begin astm d3359 08 having to overcome the cohesive strength of the coating layer.

ASTM D 3359 - 09 Standard Test Methods for Measuring Adhesion by Tape Test

For coatings on soft substrates, issues include how deep should astm d3359 08 cut penetrate, and is it possible to cut only to the interface? When the peel angle and rate vary, the astm d3359 08 required to remove the tape can change dramatically due to the rheological properties of the backing and adhesive.

Variation in pull rate and peel angle can effect large differences in test values and must be minimized to assure reproducibility 3.

These test methods have been reported being used to measure adhesion of organic coatings on non-metallic substrates for example, wood and plastic astm d3359 08, although related precision and bias data is lacking.

If testing coatings on non-metallic substrates, either Test Method A or Test Method B may be more appropriate and astm d3359 08 method employed should be discussed by interested parties.

Direct tests include the Hesiometer and the Adherometer 2. Common methods which astm d3359 08 the direct tests are peel, lapshear, and tensile tests. Criteria deemed essential for a test to warrant large-scale acceptance are: There generally is difficulty, however, in relating these tests to basic adhesion phenomena.



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