Scratching Tool acc. to van Laar, Model 426 Scratching Tool, SCRATCHMARKER 427 Scratching Tool acc. to Clemen, HANDCUTTER 428 Scratch Stylus acc. to Sikkens, Model 463 Scratch Stylus acc. to Sikkens, Model 463-Pro Scratch Tool: Test Tip acc. to Clemen testing equipment for quality management Technical Description and Operating Instruction Scratch tools Compact construction Portable instruments with different to apply defined scratches through coatings

Order Informations Purpose and Application Scratching-in of the St, Andrew's cross into test panels is a well-known preparation for short-term and endurance corrosion tests, enabling the examination of the protection of the coating against rusting of the substrate underneath the coating ("underrusting"), The Sratching Tool acc. to van Laar is a handy universal tool: for producing accurately defined incisions on the surface of the coating in preparation of forced corrosion tests, such as salt spray, continuous or intermittent immersion, accelerated weathering, gas corrosion and humidtiy tests,...

Purpose and Application It is a common method to prepare coated test panels for corrosion tests by applying various linear scratches in a vertical, horizontal or intersecting manner in such a way that the resistance of the coating system against rust formation under the coating can be tested. Beside the use of a test tip according to "van Laar" as scratch tool, frequently the use of a test tip according to "Clemen" (included in the scope of supply) is specified for this procedure. Sometimes a single test tip for cross hatch cutting tests may also be used. Depending on the requirements the user...

Accessories/Spare Parts Scratch Performance For producing a specified incision in the protective coating, the test panels are scratched with the scratch tools at the beginning of the corrosion test and again at regular time intervals. These scratches are made horizontally, one above the other, the first at the bottom on the shorter side of the panel. By this method it is easy to study the progression of the "underrusting". More or less strain will have to be exerted according to the thickness and hardness of the coating in order to reach the substrate with certainty and to produce a slight deformation...