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ASTM D3359 Measuring Adhesion by Tape Test
When making successive single cuts with the aid of a guide, place the guide on the uncut area. If the metal has not been reached make another grid in a different 3d359-08.
Do not attempt to deepen a previous cut as this may affect adhesion along the incision. Register for a trial account.
ASTM D 3359 – 09 Standard Test Methods for Measuring Adhesion by Tape Test
Issues with plastic substrates are noted in Appendix X1. Flaking and detachment worse than Grade 1. Small flakes d335-08 the coating are detached along edges and at intersections of cuts.
The coating has flaked along the edges of cuts in large ribbons and whole squares have detached.
Discard cutting tools that develop nicks or other defects that tear the lm. For large structures make sufficient tests to ensure that the adhesion evaluation is representative of the whole surface.
Although some rather brittle coatings may exhibit cohesive failure, the tape test adhesion method does not make provision for giving failure locality 7, 8.
The conditions and time of exposure will be governed by ultimate coating use or shall be agreed upon between the purchaser and seller. Print 1 2 3 4 5 page sstarting from page current page. A axtm test method, ISOpermits tests on soft substrates for example, wood satm plaster. The coating has aked along the edges and on parts of the squares.
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: Note 3—It should be recognized that differences in adherability of the coating surface can affect the results obtained with coatings having the same inherent adhesion. Current supplies of Permacel 99 on the market at this time have a shelf life that qstm out in July For large structures make sufficient tests to ensure that the adhesion evaluation is representative of the whole surface.
Test Methods D was developed with metal astn the substrate and, in the absence of supporting precision and bias data, is so limited. Weatherization Game Print and Assembly Directions.
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 the coating.
When making successive single cuts with d3359–08 aid of a guide, place the guide on the uncut area. NOTE 1—This test method has been reported being used to measure adhesion of organic coatings on soft substrates for example, wood and plastic.
A similar test method, ISOpermits tests on non-metallic substrates for example, wood and plaster.
The coating has flaked along the edges and on parts of the squares. If the metal has not been reached make sstm grid in a different location. Also, because tapes change on storage, bond strengths of the tape may change over time 7, 8. Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm.
The color under the transparent tape is a useful indication of when good contact has been made. Test Method D3395-08 was developed with metal as the substrate and, in the absence of supporting precision and bias data, is so limited.
Nails, Spikes, and Staples.
D — 08 Standard Test Methods for Measuring Asmt by Tape Test1 This standard is issued under the xed designation D ; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision. Permission rights to photocopy the standard may also be secured from the ASTM website www. Users shall not use intermediate values for ranking adhesion tests within this method. Issues with plastic substrates are noted in Appendix X1.
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. In its simplest version a piece of adhesive tape is pressed against the paint film and the resistance to and degree of film removal observed when the tape is pulled off.