Post Overview

Compared to other metal anti-corrosion methods, the hot-dip galvanizing process possesses unparalleled and inherent advantages in the following aspects:

Electrochemical protection of the coating

Coating density

Coating durability

Maintenance-free performance

Coating-substrate bonding strength

Cost-effectiveness

Adaptability to steel components of various shapes and sizes

High production efficiency

Hot-dip galvanized steel offers additional benefits in practical applications, including:

Formability

Weldability

Paintability

Excellent ductility

Hot-dip galvanizing technology is increasingly developing toward large-scale production and cost reduction.

Zinc Coating Thickness and Service Life

The service life of galvanized coatings primarily depends on their thickness, which can be easily assessed through:

Visual inspection of surface continuity and brightness

Accurate measurement using magnetic thickness gauges to verify compliance with standards

Atmospheric exposure tests demonstrate the following service lives for an 86μm hot-dip galvanized coating:

Heavy industrial areas: 13 years

Marine environments: 50 years

Rural areas: 104 years

Urban areas: 30 years

General performance benchmarks:

Zinc coating weight of 600g/m²: Maintenance-free service life of 20-50 years

Pre-painted steel (non-galvanized substrate): 3-5 years lifespan

Pre-painted steel (galvanized substrate): 20-30 years lifespan