Standard specifications for zinc coating thickness of galvanized steel sheets:
Zinc coating standards for hot-dip galvanized steel grating products: First, for hot-dip galvanized steel gratings with a thickness greater than or equal to 6mm, the average thickness should be greater than 85 microns, and the local thickness should be greater than 70 microns.
Secondly, for hot-dip galvanized steel gratings with a thickness less than 6mm and greater than 3mm, the average thickness should be greater than 70 microns, and the local thickness should be greater than 55 microns.
Finally, for hot-dip galvanized steel gratings with a thickness less than 3mm and greater than 1.5mm, the average thickness should be greater than 55 microns, and the local thickness should be greater than 45 microns.
Advantages of hot dip galvanizing:
1. Low treatment cost: Hot-dip galvanizing anti-rust cost is lower than other paint coatings.
2. Durable: In suburban environments, the standard hot-dip galvanized rust-proof thickness can last for more than 50 years without repairs; in urban or offshore areas, it can last for 20 years without repairs.
3. Good reliability: The galvanized layer is metallurgically combined with the steel and becomes part of the steel surface, so the durability of the coating is relatively reliable.
4. The coating has strong toughness: The galvanized layer forms a special metallurgical structure and can withstand mechanical damage during transportation and use.
5. Comprehensive protection: Every part of the plated part can be coated with zinc, even in recesses, sharp corners and hidden places, it can be fully protected.
6. Save time and effort: The hot-dip galvanizing process is faster than other coating construction methods and can avoid the time required for painting on the construction site after installation.
7. Low initial cost: In general, the cost of hot-dip galvanizing is lower than applying other protective coatings, because other protective coatings such as sandblasting and painting are labor-intensive processes, while the process of hot-dip galvanizing is highly mechanized and precise. Controlled in-plant construction.
