Sample preparation scratching tool HANDCUTTER 428

The HANDCUTTER 428 is a handheld scratching tool for producing defined scratches in paint and coating systems. It is supplied with a Clemen test probe and a solid aluminium adapter block for secure holding.

Purpose and application
It is used to prepare coated test panels for corrosion tests by applying defined linear scratches (vertical, horizontal or intersecting) so the resistance of the coating against under-rusting can be assessed. Depending on procedure requirements, either a Clemen test tip (included) or test tips according to Van Laar (or a single cross-hatch tip) may be used as scratch tools. These scratches are suitable for accelerated corrosion tests such as condensation water tests, gas corrosion tests, salt spray tests, continuous or alternate immersion tests and accelerated weathering tests.

Scratch performance
Scratches are produced at the start of a corrosion test and again at intervals to study progression of underrusting. The user must apply more or less force depending on coating thickness and hardness to reach the substrate and achieve slight metal deformation. A ruler is recommended for straight lines and the recommended drawing speed for a clean scratch is about 10 cm/s (4"). The scratch tool should be led as vertically as possible over the coating when through-scratching.

Scope of delivery

• HANDCUTTER 428
• Scratch tool according to Clemen (test probe)

Standards

• DIN 53 167
• VDA 621-414
• VDA 621-415
• ECCA T8
• DIN ISO 4623

Accessories (examples)

• Test tip according to Clemen (R 1.0 mm) — Order number: 02180232 — (accessory)
• Test tip according to van Laar (Ø 0.5 mm) — Order number: 05390132 — (accessory)
• Test tip for cross hatch cutting (30°) — Order number: 05640132 — (accessory)

Technical characteristics / specifications

• Order number: 02580131
• Scratch profile: Clemen, Van Laar
• Handle: high-quality, sturdy plastic, ergonomically shaped
• Adapter block: solid aluminium adapter block for holding the scratching tool
• Included test probe: Clemen
• Intended use: producing defined scratches on coatings for corrosion/accelerated ageing tests (salt spray, condensation, immersion, gas corrosion, weathering)
• Recommended scratch speed: approx. 10 cm/s (4")