What Is Galvanizing?

What Is Galvanizing?

Galvanizing is a process used to protect metal, typically steel or iron, from corrosion by coating it with a layer of zinc. This protective zinc layer prevents rust and oxidation, extending the lifespan of the metal. The coating is bonded metallurgically to the steel and this coating helps to protect the surface against corrosion.

Types of Galvanizing

• Hot-Dip Galvanizing (HDG): The metal is submerged in molten zinc, forming a thick, durable coating.
• Electro-Galvanizing: A thin layer of zinc is applied using an electric current, providing a smoother finish.
• Sherardizing (Vapor Galvanizing): The metal is heated with zinc powder, creating a diffusion coating.
• Mechanical Galvanizing: Zinc powder is applied using mechanical impact in a tumbling process.

Benefits of Galvanizing

• Corrosion Resistance – Protects against rust and environmental damage.
• ‍Longevity – Extends metal lifespan (often 50+ years).
• ‍Low Maintenance – No need for frequent repainting or upkeep.
• ‍Cost-Effective – More affordable in the long run compared to other coatings.

If the coating is scratched and scuffed, will it last as long?

Hot dip galvanized coatings have excellent abrasion resistance. In fact, the outer zinc layer is soft enough to absorb impact and abrasion while the alloy layers that are metallurgically bonded to the steel, are harder than the steel substrate. Minor abrasion will have little impact on the life of the coating.