HANDCUTTER 428

Order number: 02580131

Defined scratch damage of painted surfaces, scratching point according to Clemen

452.00 €

Net price plus sales tax. Sale exclusively to commercial buyers

Delivery time 3-4 weeks

Description

Scratching tool according to Clemen, Model 428 – with a high-quality, sturdy plastic handle, ergonomically shaped, for generating the necessary scratching force without fatigue, even on most hard paint surfaces, there is a solid aluminium adapter block made for holding the scratching tool. The HANDCUTTER 428 comes with the test probe (according to Clemen) as a scratching tool. It is also possible to use the above mentioned test probes according to the Van Laar principle, or for cross-cut 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 has to meet, these test tips used as scratch tools are appropriate tools to produce defined scratches on coating surfaces provided for accelerated corrosion tests, such as condensation water tests, gas corrosion tests, salt spray tests, continuous or alternate immersion tests and accelerated weathering tests etc.

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 of the metal. Advantageously, a ruler should be used to obtain a straight scratch line. For drawing a clean scratch should be about 10 cm/s (4").

It is important that during the through-scratching procedure the appropriate scratch tool is lead as vertically as possible over the coating to be scratched through.