A. Hot-Dip Galvanizing
Hot-dip galvanizing is the best surface treatment way for steel grating&stair tread, steel stanchions. Under the environment ranging from PH6 to PH12.5, the protective layer will be formed on the zinc coating, which has good corrosion resistance. It could reach 100μ thickness and steel grating with 100μ hot-dip galvanizing has a anticipated life time of 40-100 years according to different environment.
B. Powder Coating
Powder coating is available for steel grating&stair tread, but it is usually used for aluminum grating&aluminum louver. There are many colors for your reference, and 10 years or 15 years warranty is generally adopted.
C. Clear Anodizing
Clear anodizing is the most common way for aluminum products, like swaged aluminum grating&swaged aluminum louver, aluminum fin louver, aluminum stair tread, aluminum railings&stanchions and so on. 20μ-25μ thickness anodizing is usually recommended.