Application
ZINGA® Application Process: Achieving Long-Lasting Steel Protection
Applying ZINGA®, a high-performance zinc-rich coating, ensures superior corrosion protection for steel structures. Proper application is essential to maximize its durability and protective properties. Follow this step-by-step guide to ensure the best results:
1. Surface Preparation
The foundation of an effective ZINGA® coating lies in thorough surface preparation. Any contamination can disrupt the cathodic protection and adhesion, so follow these key steps:
a. Cleaning the Surface
Remove contaminants such as dirt, oils, grease, salts, and mill scale using:
- Steam Cleaning: At 80°C and 140 bar for optimal results.
- Detergent Cleaning: For large-scale applications.
- Solvent Cleaning: Use Zingasolv for small or non-critical areas.
b. Surface Roughening
Create a surface profile for proper adhesion.
- Roughness Requirements: Depth of Rz 50-70 µm and Ra 12.5 µm.
- Methods: Grit blasting or slurry blasting to achieve cleanliness level SA 2.5. For small areas, use steel brushes or abrasive disks.
c. De-dusting
Ensure the surface is free of dust and chloride contamination (<50 mg/m²) using clean, compressed air.
2. Mixing ZINGA®
Before application, ZINGA® must be mechanically stirred to achieve a homogeneous consistency. Re-stir the mixture every 20 minutes during application to maintain uniformity.
3. Application Methods
ZINGA® can be applied using a variety of techniques, tailored to project requirements:
a. Brush Application
- Suitable for small areas and stripe coats.
- Dilute the first coat 5-10% with Zingasolv for smooth application and deep penetration.
- Ideal for corners, sharp edges, and bolts to ensure complete coverage.
b. Roller Application
- Use a short-fiber roller for secondary coats.
- Important: The first coat must not be applied with a roller to ensure proper penetration into the surface profile.
c. Spray Application
- Conventional Spray Gun: Dilute ZINGA® 10-20% with Zingasolv for optimal flow and finish.
- Airless Spray Gun: Dilute 5-7% with Zingasolv for large-scale, even coverage.
4. Environmental Conditions for Application
ZINGA® can be applied in a wide range of weather conditions:
- Temperature: -15°C to +40°C.
- Humidity: Up to 95%, provided the steel is at least 3°C above the dew point.
5. Recharging Existing Zinc Surfaces
For reapplication over old galvanized or ZINGA® coatings:
- Remove zinc salts (oxides and carbonates) using steam cleaning or solvent cleaning with Zingasolv.
- Roughen the surface with sweep or sponge blasting to ensure adhesion.
- Apply a diluted first coat for effective bonding.
6. Overcoating ZINGA®
ZINGA® can be overcoated with compatible topcoats for additional protection or aesthetic finishes.
- Use sealers like Zingalufer (PU) or Zingaceram HS (EP) for a smooth transition.
- Employ the mist/full coat technique to avoid bubbling or compatibility issues.
Why Follow the Application Process?
Adhering to the proper application process ensures:
- Optimal cathodic protection.
- Long-lasting performance and durability.
- Reduced maintenance and repair costs.
For detailed guidance or technical assistance, contact ZINGA Bangladesh at:
📧 Email: info@zingabd.com
📞 Phone: +8801602-122344
🌐 Website: zingabd.com
Protect your steel structures with ZINGA® – the ultimate solution for corrosion-free longevity!
