Steel Galvanization is a process used to protect metal components and improve their appearance. It involves the electrolytic deposition of thin metal layers onto other materials, primarily metals. This process relies on electrochemical phenomena and requires proper preparation of materials before applying the new coating.
How does the metal galvanization process work?
Galvanization involves preparing a galvanic bath in which electrodes are immersed, and a current flows between them. Materials undergoing galvanization must be properly cleaned to ensure the durability of the new layer. After cleaning, the material is submerged in an electrolyte solution containing metal ions—commonly nickel, gold, chrome, or zinc.
Direct current is applied, which makes the coating durable and well-adhered. More than one metal layer can be applied in a single process.
What characterizes the new layer created through galvanization?
The thickness of the coating depends on the current and its density. Too low density results in coarse crystalline coatings; too high leads to undesirable deposits. The composition of the bath solution, metal types, and electrolyte temperature are also important factors.
When is galvanizing steel used?
Galvanization is widely used in industry to create protective coatings that resist weather and mechanical damage. For example, galvanizing steel—prone to rust—is both effective and cost-efficient, also enhancing the material’s appearance.
Is galvanized steel rust-resistant?
Yes, galvanized steel does not rust unless the zinc coating is damaged. Under good conditions, it can last up to 50 years.
Does zinc-coated steel rust?
If hot-dip zinc-coating is properly done, the material should not corrode, offering similar durability to electro-galvanized steel.