Frequently Asked Questions (FAQ) – Unigalv
1. What is Unigalv?
Unigalv is a one-component coating system containing 96% zinc in the dry film, providing cathodic protection to ferrous metals. It serves as an alternative to hot-dip galvanization, a primer in duplex systems, or a recharging system for existing galvanized surfaces.
2. How does Unigalv protect metal surfaces?
Unigalv offers cathodic protection by forming a zinc layer that actively prevents corrosion on ferrous metals. It can be used on its own or as part of a duplex system with compatible topcoats.
3. How does cathodic protection work?
Cathodic protection works by using a sacrificial anode (such as zinc) to prevent the corrosion of a more reactive metal, like steel. The zinc in Unigalv acts as the anode and corrodes preferentially, protecting the underlying steel from rust and deterioration.
4. What are the application methods for Unigalv?
Unigalv can be applied by brushing, rolling, or spraying onto a clean and rough surface. It is also available in an aerosol format for convenient application.
5. What surfaces can Unigalv be applied to?
Unigalv is suitable for bare steel, previously galvanized surfaces, and worn hot-dip galvanized or metallized surfaces. Proper surface preparation is necessary for optimal adhesion and performance.
6. Is Unigalv environmentally friendly?
Yes, Unigalv is non-toxic once dry and complies with environmental safety standards. It has excellent UV resistance and is free from hazardous heavy metals.
7. What is the recommended drying time for Unigalv?
Unigalv dries through solvent evaporation. At 20°C in a well-ventilated environment, it is:
- Touch dry: 10-20 minutes
- Dry to handle: 90 minutes
- Fully cured: 24 hours
8. Can Unigalv be overcoated with other paints?
Yes, Unigalv can be overcoated with a wide range of compatible paints. To ensure proper adhesion, a mist coat followed by a full coat is recommended. A sealer may be applied to improve topcoat performance.
9. How should Unigalv be stored?
Store Unigalv in a cool, dry place at temperatures between 5°C and 25°C. If stored properly, it has an unlimited shelf life.
10. What safety precautions should be taken when applying Unigalv?
Ensure proper ventilation during application. Use gloves, goggles, and a respirator if applying Unigalv in confined spaces. Follow the safety data sheet for further guidelines.
11. How do I clean application tools after using Unigalv?
Use Unisolv for cleaning spray guns, brushes, and rollers after application. Do not use white spirit, as it may affect performance.
12. How do I thin Unigalv for application?
To thin Unigalv, you must use Unisolv. This ensures proper consistency without affecting the protective properties of the coating.
13. How long will the metal be protected if Unigalv is applied at 60 microns (one coat)?
The period of protector protection depends on the number of layers and the operating conditions of metal structures. For example, a zinc layer of 40-60 microns retains its anti-corrosive properties for up to 20 years.