coatings

galvanizing

Steel is a mainstay in modern construction and has been since the beginning of the industrial revolution. Engineers, architects and construction professionals trust the strength and durability steel provides; however, as soon as steel is exposed to the environment, it begins to corrode. Hot dip galvanizing protects steel from corrosion due to a metallurgical bond that occurs when steel is submerged in molten zinc. The reaction creates inter-metallic layers, harder than the base steel itself, resulting in an extremely abrasion resistant coating that can last for decades.

The hot-dip galvanizing process consists of three steps: surface preparation, galvanizing, and inspection.

Surface Preparation:
For high quality hot-dip galvanizing, steel must be properly prepared prior to being immersed in a bath of molten zinc. During the surface preparation stage, material going through degreasing/caustic cleaning, pickling, and fluxing.

Galvanizing:
Following surface preparation, the steel will be immersed in a bath of molten zinc. The zinc kettle contains at least 98% pure zinc and is maintained at a temperature between 815ยบ-850ยบ F (435ยบ-455ยบ C). While steel is immersed in the kettle, the zinc reacts with the iron in the steel to form a series of metallurgically bonded zinc-iron alloy layers with the final top layer 100% zinc.

Inspection:
The inspection process of galvanized steel is fairly simple. Zinc will not react with unclean steel, therefore a visual inspection of the product will provide a good assessments of the quality of the coating. Tests for coating thickness and adherence to ASTM standards will also be performed.

Halol Factory Kettle Size: 12.5m(L) x 1.5m(W) x 2.5m(H)
Indapur Factory Kettle Size: 16.3m(L) x 2.5m(W) x 3.3m(H)

Contact Bombay Tubes & Poles Co. to learn more about our Stadium Masts, or send an inquiry to request information or a quote.

download brochure