CT578 Metal Repair Compound
Performance Indicators
| Glass Transition Temperature Tg, DSC (℃) | Shore Hardness | Elongation at Break (%) | Weight Mixing Ratio (A:B) |
Working Time （200g，25℃，min） |
|---|---|---|---|---|
| 67 | 86 | 0.35 | 7.25:1 | 35 |
| Tensile Strength（MPa） | Compressive Strength（MPa） | Adhesion Strength（MPa） | Shear Strength（MPa） | Maximum Service Temperature（℃） |
| 27 | 134 | 11 | 19.5 | 100 |
Application Areas
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Rapid repair of worn componentsIt repairs workpiece damage resulting from mechanical impact or corrosion. Typical applications include restoring dimensional tolerances of worn shafts, repairing worn keyways and mending damaged housings. -
Silicon-iron filledIt cures into a metal-like finish, which can fill pitted areas on worn mechanical surfaces and restore fitting clearances of bearing housings.
Application Method
Surface Preparation
Proper surface preparation is critical to the long-term performance of this product. Exact requirements vary according to service severity, expected service life and the initial condition of the substrate.
1.Remove dirt, oil, grease and other contaminants with a suitable cleaner, such as a high-pressure water washing system equipped with detergent/degreaser.
2.Blast all surfaces with sharp-edged abrasive media to achieve a surface profile depth of 75–100 μm, and a cleanliness grade of near-white metal (SIS Sa 2½ / SSPC-SP 10).
3.Immediately after blasting and before oxidation or contamination occurs, clean the metal surface with an anhydrous solvent cleaner.
4.Metals exposed to salt solutions (e.g. seawater) shall undergo abrasive blasting and high-pressure water blasting, then be left to stand for 24 hours to allow any chlorides within the metal to migrate to the surface. Conduct a chloride contamination test. Repeat the procedure until the surface chloride concentration is below 40 ppm.
5.Mix resin and hardener at a volume ratio of 4:1 (weight ratio 7.25:1), and stir thoroughly until a uniform color is achieved.
6.Apply the product onto the pre-prepared substrate.
7.Follow the below procedures for shaft repair:
- Machine the worn area to a depth of 3 mm (0.125 in) to form a square shoulder on the component. Square edges deliver more reliable performance than feathered edges with this material.
- Machine a spiral undercut at the base of the repair zone to create a mechanical interlock for enhanced surface bonding.
- Apply excess repair compound to avoid surface depressions caused by minor shrinkage during curing.
- Machine the repair layer back to the original dimension prior to full curing, as the cured material features exceptional wear resistance.
Application Instructions
1.Keep substrate temperature at least 3 °C (7 °F) above the dew point to prevent moisture condensation on components. Working time and cure time are temperature- and mass-dependent; higher temperatures accelerate curing.
2.Larger material volumes result in faster curing. To accelerate epoxy curing at low temperatures:
3.Pre-warm the epoxy resin at ambient temperature before mixing, and preheat the repair surface until warm to the touch, while ensuring the work area meets appropriate environmental conditions.
4.Preheat the repair surface until warm to the touch.
5.Maintain suitable environmental conditions within the work zone.
Precautions
1.This product shall not be used in pure oxygen or oxygen-enriched environments, and cannot be applied as a sealing material for chlorine gas or other strong oxidizing substances.
2.Refer to the Material Safety Data Sheet (MSDS) for safety handling information of this product.
3.Store at room temperature in a cool and dry place.
Shelf Life
24 months
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