New and updated edition.
When it comes to testing the pull-off adhesion of coatings on concrete substrates, using a pull-off adhesion tester, it is similar to testing coatings on metal substrates. However, there are a number of differences in the test procedures and equipment used.
When using a pull-off adhesion tester on a coating applied to a concrete substrate as the coating adhesion values on a concrete substrate tend to be considerably lower than those on metal substrates, a 50mm diameter dolly is most commonly used. This allows for consistent and more reliable results at low pull-off values.
Gauges such as the Elcometer 106/6 are designed specifically for testing coatings on concrete, as are the Elcometer 506 and Elcometer 510, which have specially designed dolly skirts for use with 50mm dollies.
This video goes through selecting an appropriate position for the test, preparing the dolly and surface, the pull-off test, and assessing the result.
All pull-off adhesion testers follow the same principle. A properly prepared dolly, or pull stub, is glued to the prepared coating, and, once the glue has fully cured, the dolly is pulled off -perpendicularly (or 90 degrees) from the surface. The resultant tensile pull-off force, together with the dolly diameter, and the conditions of the dolly, are all recorded.
For more information on measuring pull-off adhesion on coated substrates using Elcometer's range of pull-off adhesion gauges, please contact Elcometer at sales@elcometer.com or visit our website: elcometer.com/en/coating-inspe...
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Click here to download the video script in English: www.elcometer.com/pub/media/P...
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STANDARDS:
Elcometer 106
AS 1580.408.5, ASTM D 4541, AS/NZS 1580.408.5, EN 13144, EN 24624, ISO 4624, ISO 16276-1, JIS K 5600-5-7, NF T30-062, NF T30-606
Elcometer 106/6
ASTM D 7234, BS 1881-207, DIN 1048-2, EN 1542, EN 12636
Elcometer 506
ASTM D4541, ASTM D7234, AS/NZS 1580.408.5, BS 1881-207, DIN 1048-2, EN 12636, EN 13144, EN 1542, EN 24624, ISO 16276-1, ISO 4624, NF T30-606, NF T30-062
Elcometer 510
ASTM C1583, ASTM D4541, ASTM D7234-12, AS/NZS 1580.408.5, BS 1881-207, DIN 1048-2, EN 1015-12, EN 12636, EN 13144, EN 1542, EN 24624, ISO 16276-1, ISO 4624, NF T30-606, NF T30-062