ZHY Automatic Scratch Tester
| Origin | Shanghai, China |
|---|---|
| Manufacturer Type | Distributor |
| Origin Category | Domestic (China) |
| Model | ZHY |
| Price | Upon Request |
| Power Supply | 60 W, 220 V, 50 Hz |
| Weight Range | 50 g to 2500 g |
| Indenter Ball Diameter | 1 mm |
| Dimensions (L×W×H) | 380 × 300 × 180 mm |
| Net Weight | 25 kg |
Overview
The ZHY Automatic Scratch Tester is an electromechanically driven instrument engineered for standardized assessment of scratch resistance and coating integrity in organic coatings—including paints, varnishes, and related single- or multi-layer film systems. It operates on the principle of controlled mechanical indentation under precisely regulated normal load, where a hardened steel spherical indenter (1 mm diameter) is drawn across the coated substrate at constant speed and defined geometry. The resulting damage—ranging from surface marring to complete film penetration—is evaluated visually or microscopically against standardized failure criteria. This method conforms to fundamental tribological test paradigms used in industrial quality control and R&D laboratories, delivering reproducible, load-dependent performance data essential for formulation optimization, batch release, and regulatory compliance.
Key Features
- Automated linear traverse mechanism ensures consistent scratch velocity and path alignment, minimizing operator-induced variability.
- Adjustable vertical loading system with calibrated stainless-steel weights (50 g to 2500 g), enabling stepwise evaluation of critical load thresholds (e.g., onset of cracking, delamination, or substrate exposure).
- Interchangeable 1 mm diameter hardened steel ball indenter, compliant with ISO 12137-1:1997 geometric specifications and hardness requirements (≥60 HRC).
- Robust aluminum-alloy frame and precision-machined guide rails ensure long-term dimensional stability and mechanical repeatability.
- Integrated power supply (60 W, 220 V, 50 Hz) supports stable motor operation without external voltage regulation.
- Compact footprint (380 × 300 × 180 mm) and 25 kg net weight facilitate benchtop deployment in QC labs, pilot plants, and accredited testing facilities.
Sample Compatibility & Compliance
The ZHY tester accommodates flat, rigid substrates up to 200 mm × 200 mm, including metal panels (steel, aluminum), glass slides, and polymer sheets coated with liquid-applied or powder-coated finishes. It supports both qualitative pass/fail assessments and semi-quantitative ranking of coating systems under identical test conditions. The instrument fully implements the procedural requirements of GB/T 9279–1988 (“Determination of Scratch Resistance of Paints and Varnishes”) and ISO 12137-1:1997 (“Paints and Varnishes — Determination of Scratch Resistance — Part 1: Constant Load Method”). Its mechanical design and operational protocol are aligned with general principles referenced in ASTM D7027 (Standard Test Method for Scratch Resistance of Polymeric Coatings Using an Instrumented Scratch Tester), though it does not incorporate force-sensing or acoustic emission modules required for full ASTM D7027 compliance.
Software & Data Management
As a manually operated, non-instrumented mechanical tester, the ZHY model does not include embedded firmware, digital interface, or proprietary software. All test parameters—including applied load, scratch length, substrate identification, and visual evaluation results—are documented manually using laboratory notebooks or LIMS-integrated electronic forms. Users may integrate test records into GLP- or GMP-aligned workflows by applying standardized templates compliant with ISO/IEC 17025 documentation requirements. Audit trails, calibration logs, and maintenance histories must be maintained externally per organizational quality management system (QMS) procedures. Optional accessories—such as calibrated weight sets traceable to national standards and certified reference panels—support metrological traceability during routine verification.
Applications
- Quality assurance of automotive OEM and refinish coatings for resistance to keying, stone-chip abrasion, and assembly-line handling damage.
- Formulation screening of architectural paints to optimize binder-resin crosslink density and pigment dispersion stability.
- Comparative evaluation of anti-graffiti, antimicrobial, or self-healing topcoats under controlled mechanical stress.
- Pre-qualification testing of powder-coated aluminum extrusions for façade applications per EN 13523-12 (Coil Coated Metals — Test Method for Scratch Resistance).
- Educational use in polymer science and surface engineering curricula to demonstrate coating adhesion mechanics and failure mode taxonomy (e.g., cohesive vs. adhesive fracture).
FAQ
Does the ZHY Automatic Scratch Tester meet FDA or ISO 13485 requirements for medical device coating validation?
No—the instrument is not designed or validated for use in regulated medical device manufacturing environments. It lacks force feedback, real-time data logging, or 21 CFR Part 11-compliant electronic records.
Can the indenter be replaced with diamond-tipped or conical geometries?
No—the system is mechanically configured exclusively for 1 mm spherical steel indenters per ISO 12137-1. Non-standard tips would invalidate conformance to referenced standards.
Is calibration certification included with purchase?
Calibration certificates are not supplied by default; however, users may commission third-party metrology providers to verify weight accuracy and mechanical travel linearity against ISO/IEC 17025-accredited references.
What substrate preparation guidelines apply?
Substrates must be cleaned per ISO 8501-1 (visual assessment of surface cleanliness) and conditioned at 23 ± 2 °C and 50 ± 5 % RH for ≥24 h prior to testing, as specified in ISO 12137-1.
How frequently should maintenance be performed?
Lubrication of linear guides and verification of weight stack integrity are recommended every 200 test cycles or quarterly—whichever occurs first—to ensure mechanical fidelity and measurement consistency.
