Anti-Corrosion Primer
Dachin Graphene 018
Epoxy graphene zinc rich coating
Main Components
Two-component packaging. Component A consists of medium molecular weight epoxy resin, zinc powder, pigments, rheological additives and solvents through dispersion grinding. Component B is amine-based curing agent.
Key Features
High zinc content provides outstanding anti-corrosion through electrochemical protection. Features rapid ambient curing, excellent substrate adhesion, intercoat compatibility, heat resistance and weldability preservation.
Primary Applications
Widely used for bridges, stadiums, metallurgy, shipbuilding and vehicle manufacturing. Ideal anti-corrosion coating for steel structures across industries.
Technical Specifications
| Film Color & Appearance | Gray, smooth finish free from particles, pinholes or bubbles |
|---|---|
| Density, kg/L | 1.95±0.05 |
| Adhesion (Cross-cut Test), Grade | ≤1 |
Packaging
| Net Weight / kg | Volume / L | |
|---|---|---|
| A | 30 | 13.6 |
| B | 3 | 3.3 |
| Total | 33 | 16.9 |
Basic Parameters
| Mixing Ratio |
By Weight: A︰B = 10︰1 By Volume: A︰B = 4.1︰1 |
|---|---|
| Pot Life | 6h at 5℃ | 5h at 15℃ | 4h at 25℃ |
| Theoretical Coverage | Approx. 6㎡/L at 100μm DFT |
Recoat Intervals
| Temperature | Surface Dry | Hard Dry | Recommended Overcoating Interval | |
|---|---|---|---|---|
| Minimum | Maximum | |||
| 5℃ | 120 min | 18h | 16h | 3 months |
| 15℃ | 90 min | 15h | 12h | |
| 25℃ | 60 min | 10h | 10h | |
| 40℃ | 30 min | 8h | 8h | |
Data based on standard film thickness applied on tinplate substrate.
Application
Dachin Zinc 081 Epoxy Zinc-Rich Primer can be applied via conventional spray, airless spray or brush. Requires minimum 5℃ curing temperature (max 40℃). Maintain surface ≥3℃ above dew point with RH <85%.
Main Components
Graphene-enhanced zinc-rich epoxy coating. Two-component, low-VOC, high-solids, self-curing system containing modified epoxy resin, zinc powder, pure graphene, additives and thinners.
Key Features
Long-term protection for severe corrosive environments:
- Superior corrosion resistance through graphene-enhanced zinc utilization and maze-effect barrier
- Excellent flexibility and impact resistance even at extreme thickness
- Tolerant to low-profile surfaces with exceptional adhesion
- Compliant with ISO 12944-6 Annex B cyclic corrosion testing
Primary Applications
For bridges, offshore structures, petrochemical and paper industries. Complies with JT/T 722-2023 and HG/T 5573-2019 standards.
Technical Specifications
| Film Color & Appearance | Dark gray, smooth finish |
|---|---|
| Density, kg/L | 2.5±0.1 |
| Volume Solids, % | 60±2 |
Packaging
| Net Weight / kg | |
|---|---|
| A | 32.7 |
| B | 3.3 |
| Total | 36 |
Basic Parameters
| Mixing Ratio |
By Weight: A︰B = 10︰1 By Volume: A︰B = 3.1︰1 |
|---|---|
| Pot Life | 6h at 5℃ | 5h at 15℃ | 4h at 25℃ |
| Theoretical Coverage | Approx. 8.6㎡/L at 70μm DFT |
Recoat Intervals
| Temperature | Surface Dry | Hard Dry | Recommended Overcoating Interval | |
|---|---|---|---|---|
| Minimum | Maximum | |||
| 5℃ | 100 min | 24h | 24h | 3 months |
| 25℃ | 30 min | 1.5h | 6h | |
Data based on standard film thickness applied on tinplate substrate.
Application
Dachin Graphene 018 can be applied via conventional spray, airless spray or brush. Requires:
• Minimum 5℃ curing temp (max 40℃)
• Material temperature ≥15℃
• Surface ≥3℃ above dew point
• RH <85%
• Clean/dry substrates with proper ventilation
Mixing: Use mechanical agitation to redisperse settled zinc particles before adding curing agent. Maintain continuous mixing during application. Frequent agitation required when diluted or during extended breaks.
Application: Multiple coats may be needed for brush/roller applications. Extended recoat windows available.
DFT: Adjustable from 50-100μm based on application needs, affecting coverage and curing parameters.
Thinner: Dachin Thinner X17
Recoating: Surface profiling required if exceeding max interval. Remove zinc salts (white rust) via high-pressure water jetting and stiff brushing. Consult Dachin for site-specific parameters.
Coating System
Topcoat: Dachin EP 550 Epoxy MIO Intermediate
Film Thickness
23±3μm (shop primer) | 60±20μm (anti-corrosive primer)
Surface Preparation
Steel substrate must be blast-cleaned to:
• Sa2.5 (ISO 8501-1:1988) or SSPC SP10
• Profile Rz 40-75μm
Alternative: Power-tool cleaned to St3 with degreasing
Note:
• Insufficient profile risks adhesion failure
• Excessive peaks may cause pitting corrosion
Application Methods
| Method | Thinner | Dilution Rate | Nozzle Size | Pressure |
| Airless Spray | Dachin X17 | 0-5% | 0.43-0.53mm | 22MPa |
| Conventional Spray | Dachin X17 | 0-10% | 1.8-2.2mm | 0.3-0.6MPa |
| Brush/Roller | Dachin X17 | 5-10% | - | - |
Dilution by volume ratio.