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D2792-17 – Standard Test Method Technical Guide
📐 Specimen Geometry and Preparation
ASTM D2792-17 specifies a laboratory procedure requiring precise test substrate and coating dimensions to ensure reproducible results. The substrate consists of bright tin plates with tightly controlled mass and size parameters.
| ⬛ Parameter | 📏 Specification |
|---|---|
| Panel Material | Bright Tin Plate |
| Panel Weight per Area | 19 g/dm² to 25 g/dm² |
| Panel Dimensions | 75 mm × 130 mm (approx. 3 in. × 5 in.) |
| Wet Film Thickness Options | 76 µm (3 mil) or 142 µm (6 mil) |
| Required Replicates | Minimum of 3 panels per paint tested |
💡 Preparation Tip: Thoroughly clean the tin panels with a suitable solvent and buff them lightly with fine steel wool prior to coating to ensure proper adhesion and uniform film application.
⚙️ Test Procedure and Exposure Parameters
The test paint must be examined for skins, stirred thoroughly to loosen settled pigment, and drawn down onto the prepared panels using a film applicator set to the specified wet film thickness. The coated panels are then air-dried for the time specified by the purchaser, which is typically 90 hours. Following the drying period, the panels are immersed to half their length in a covered glass beaker containing the selected hydrocarbon test fluid. A separate beaker must be used for each paint tested.
| 🟦 Fluid Type | 📄 Standard Reference | 🌡️ Immersion Temperature |
|---|---|---|
| Type I | Reference Fuel A (Fed. Spec. TT-S-735, ASTM D471) | 21 °C to 32 °C (70 °F to 90 °F) |
| Type III | Reference Fuel B (Fed. Spec. TT-S-735, ASTM D471) | 21 °C to 32 °C (70 °F to 90 °F) |
⚠️ Critical Safety Alert: Hydrocarbon test fluids are highly flammable and volatile. Always use a covered beaker and conduct the immersion procedure in a well-ventilated area or fume hood following all applicable safety, health, and environmental regulations.
📊 Key Measured Properties and Recovery
© 2026 TNLab — This article is a technical interpretation for reference only. The original standard as published by ASTM International takes precedence.