DeFelsko PosiTest AT Guia De Incio Rapido página 4

Dolly Preparation
1. To remove oxidation and contaminants, place the included
abrasive pad on a flat surface and rub the base of the dolly
across the pad 4-5 times.
2. As required, remove residue left from the abrading process
using a dry cloth or paper towel.
Coating Preparation
1. Lightly roughen the coating using the included abrasive pad.
NOTE:
As coating abrasion may introduce flaws, it should
only be used when necessary to remove surface contaminants,
or when the bond strength between the glue and the coating
is insufficient for pull testing.
2. To promote the bond between the dolly and the coating,
degrease the area of the coating to be tested using alcohol or
acetone to remove any oil, moisture or dust.
NOTE:
Ensure that any alternative abrasion techniques,
degreasers or adhesives do not alter the properties of the coating.
Test by applying a small amount of degreaser or glue to a sample
area and observing effects.
Glue Selection
The glue included in the PosiTest Adhesion Tester kit has been
selected due to its versatility. This glue has minimal impact on a
variety of coatings and has a tensile strength exceeding the
maximum performance capabilities of the pressure system under
ideal conditions. Other glues may be preferred based on
requirements such as cure time, coating type, working temperature
and pull-off strength. Quick curing one-part cyanoacrylates (super
glues) may be sufficient for painted surfaces, but two-part epoxies
are preferred for porous or rough coatings.
Dolly & Coating Preparation
Glue & Dolly Application
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