Sample preparation scratching tool Model 463

The Model 463 Scratch Stylus (Sikkens) is a handheld tool for producing defined scratching damage on coated test panels used in corrosion testing, providing repeatable, adjustable incision depth and guidance for standardized tests.


Purpose and application
The scratching stylus method is used to create defined damages (cracks) on coated test panels for corrosion tests, such as Fog Spray Test according to DIN EN ISO 9227 using ERICHSEN corrosion testing apparatus (Models 606 and 608). The lateral undercutting beneath the coating is evaluated to assess corrosion influence and coating adhesion.


Design and function
The stylus comprises a handle, a supporting knob (side support guide) and a carbide cutting blade. The cutting blade is horizontally adjustable by means of locking/adjustment screws to align with the support knob. The standard cutting blade supplied has rectangular/right-angled edges and a width of 1.0 mm. A 0.5 mm carbide cutting blade is available on request.


Execution of the test
Test panels are prepared by producing one or several straight scratch tracks across the sheet width parallel to the narrow edge, penetrating to the substrate. Where required, an St. Andrews Cross (two intersecting scratches) can be applied to evaluate undercutting and adhesion.


Scope of delivery

• Scratch Stylus acc. to Sikkens, Model 463
• Sikkens cutting edge 1 mm

Standards

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

Accessories

• Sikkens cutting edge 0.5 mm — Order number: 910926442
• Sikkens cutting edge 1.0 mm — Order number: 910926441
• Sikkens cutting edge 2.0 mm — Order number: 910926443

Characteristics / technical specifications

• Scratch profile: Sikkens 0.5 / 1 / 2 mm
• Cutting edge material: carbide
• Standard cutting edge width: 1.0 mm (rectangular/right-angled edges)
• Alternative cutting edge width: 0.5 mm (on request)
• Blade guidance: supporting knob (side support button guide)
• Adjustment: horizontal alignment by locking/adjustment screws