Coating Scratch Resistance Tester
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The Coating Scratch Resistance Tester is used to evaluate the scratch resistance of coatings. It is similar to conventional coating scratch tests, but this method uses an arc-shaped (ring or circular) stylus to measure the scratch resistance of single or composite coatings, including color paints, clear coatings, or related products.
Testing Method
The test material or coating system is applied to a smooth test panel with a uniform surface texture at a consistent thickness. After drying or curing, the scratch resistance is determined by moving the test panel under the arc-shaped (ring or circular) stylus. The stylus is mounted at a 45° angle to the panel surface, and the applied load is gradually increased until the coating is scratched. The minimum load causing coating damage is taken as the load that produces scratching in at least 2 out of 5 measurements.
Standard
GB/T 31591-2015: Methods for Determining the Scratch Resistance of Color and Clear Coatings
Application
Evaluate scratch resistance and surface durability of paints, varnishes, and protective coatings.
Test coatings used in automotive, aerospace, construction, and industrial applications.
Support quality control, product development, and compliance with industry standards.
Simulate real-world mechanical abrasion to assess coating performance and longevity.
Features
Movable work platform allows users to quickly switch between different test areas on the same panel.
Extra-large platform accommodates test panels of various sizes (maximum 200 mm × 100 mm).
Adjustable balance arm allows scratch testing of panels with different thicknesses (0–12 mm).
Technical Parameters
| Parameter | Specification |
|---|---|
| Power | 15 W |
| Travel Stroke | 80 mm |
| Weights | 100 g ×1. 200 g ×2. 500 g ×1. 1000 g ×2. 2000 g ×1 |
| Stylus | Ring-shaped, diameter (6.5 ± 0.1) mm, radius R0.8 ± 0.02 mm, thickness (1.6 ± 0.02) mm; hardness HRC 56–58. surface roughness |
| Stylus Movement Speed | 3–10 mm/s (adjustable in 0.5 mm increments) |
| Allowed Panel Thickness | 0–12 mm |
| Allowed Panel Width | 40–110 mm |
| Stylus Angle to Test Panel | 45° |
| Power Supply | Input 110–240 V AC, 50/60 Hz (Adapter output: 24 V, 2 A) |
| Dimensions (L × W × H) | 540 mm × 250 mm × 375 mm |
| Weight | 15 kg |
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