Loose particles on blast cleaned surfaces will reduce coating adhesion, leading to premature coating failure. Paul N. Gardner Co.’s SP3200 dust test kit is designed to assess the quantity and size of dust particles on blast cleaned surfaces prior to painting following the ISO 8502-3 standard.
Operators apply an adhesive tape under specified conditions on the blasted surface, picking up any residue of dust or blasting media when removed.The kit contains all required tools to perform the test, such as adhesive tape, a pictorial standard to define dust quantity and size, an illuminated magnifier, scissors, a tape-transfer sheet and a set of report forms for permanent record keeping of sample findings.
Since these tests have to be made on-site in often harsh conditions the kit has been designed so that all separate items fit inside a special binder-case and are secured in place when not in use. The report forms also offer facilities to note other relevant parameters during pre-treatment inspection such as condensation/ dew point, roughness, salt contamination and visual cleanliness. An optional spring loaded roller is available to perform the test as described in ISO 8502-3 par. 5.3 to ensure reproducible force on the test tape.