JT-8310 Black Cathodic Electrocoat
Composition
This product is composed of two components: emulsion and pigment paste. The main resin consists of epoxy resin, isocyanate crosslinking agent, and toughening agent, which forms an emulsion after neutralization with acid. The epoxy resin forms the dispersion resin, which is ground with pigments and fillers to produce the pigment paste.
Features
- Application Performance: Stable product with excellent anti-aging properties and fast film formation speed.
- Film Properties: Excellent coating appearance and mechanical performance.
- Environmentally Friendly: A water-based coating free of lead and other heavy metals, meeting environmental protection standards.
Applications
- Widely used for corrosion-resistant coating in automobiles, auto parts, home appliances, hardware, agricultural machinery, and various steel components.
- It has excellent compatibility with various types of iron, aluminum, and alloy substrates.
Technical Specifications
Raw Paint Specifications
| Item | Technical Specifications | Inspection Standard | ||
| Emulsion | Color Paste | |||
| State of Material in Container | Milky white liquid | Black viscous liquid, no agglomeration | Visual inspection | |
| Solids Content | 120°C / 1h / 2g, % | 32-34 | 40-42 | GB/T1725-2007 |
| Fineness | μm | ≤10 | ≤20 | GB/T6753.1 |
| pH Value | 25°C | 6.1-6.6 | —— | GB/T9724 |
| Conductivity | 25°C, μs/cm | 1400-2000 | —— | HG/T3335 |
Bath Parameters
| Item | Technical Specification | Testing Standard | |
| Solids Content | 120°C / 1h / 2g, % | 12-18 | GB/T1725-2007 |
| pH Value | 25°C | 5.6-6.1 | GB/T9724 |
| Conductivity | 25°C, μs/cm | 1000-2200 | HG/T3335 |
| Throwing Power | cm, NV = 20% | ≥20 | HG/T3334-2012 |
| Application Temperature | °C | 28-32 | Thermometer |
| Electrophoresis Time | s | Full Immersion 60–180 | N/A |
| Application Voltage | V | 100-240 | 2L Bath Solution |
| Drying Time / Temperature | °C / min | 175/25 | GB/T1728 |
| Solvent Content | % | 1.0-2.0 | QB8008 |
| Breakdown Voltage | V | ≥300 | HG/T3952 |
| Ash Content | —— | 8-14 | GB/T1747-1979 |
| Coulombic Efficiency | mg/C | ≥25 | HG/T3952 |
Film Performance Indicators
| Item | Specification | Testing Standard | |
| Appearance | —— | Smooth, flat, no pinholes | Visual Inspection |
| Film Thickness | μm | 15-35 | GB/T13452.2 |
| Hardness | —— | ≥2H | GB/T6739 |
| Erichsen Cupping | mm | ≥10 | GB/T9753 |
| Adhesion | Grade | 0 | GB/T9286 |
| Flexibility | mm | 1 | GB/T1731 |
| Impact Resistance | cm | 50 | GB/T1732 |
| Gloss | 60° | 50-90 | GB/T9754 |
| Acid Resistance | 0.05mol/L H₂SO₄,48h | No peeling, blistering, or wrinkling; slight discoloration allowed | GB/T 9274 Method A |
| Alkali Resistance | 0.1mol/L NaOH,48h | No peeling, blistering, or wrinkling; slight discoloration allowed | GB/T 9274 Method A |
| Salt Spray Resistance | h | ≥800 | GB/T1771-2007 |
*Salt Spray Resistance: Using Bonderite standard phosphated steel panel, unidirectional corrosion ≤ 2 mm*
Bath Preparation
Color paste : Emulsion : Deionized water = 1:3:4 (or 1:4:5 by weight). Add appropriate additives and neutralizing agents to adjust the parameters. Let the mixture age for 48 hours, then filter and apply.
Application Process
Pre-degreasing → Degreasing → Water Rinse → Surface Conditioning → Phosphating → Water Rinse → Pure Water Rinse → Electrophoresis → Post-rinse → Drying (Also suitable for silane or ceramic pretreatment processes)
Packaging and Storage
- Packaging
Emulsion: 50 kg/barrel, 200 kg/barrel, 1000-liter plastic IBC barrel (1000 kg/barrel)
Color paste: 50 kg/barrel, 65 kg/barrel - Storage Conditions
Store sealed in a cool, dry place at 5–35°C - Shelf Life
Emulsion: 6 months
Color paste: 6 months (If past the shelf life, the product can still be used if it passes quality inspection based on relevant standards.)
Safety and Hygiene Regulations
- This product is not listed in the "GB6944 Classification and Code of Dangerous Goods."
- Ensure proper ventilation during application.
- Avoid contact with eyes or ingestion.
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