Corrosion on Galvanized Steel Structure

 Corrosion on Galvanized Steel Structure

Today I’m sharing knowledge about the corrosion of galvanized steel structure. It’s noticed during my site surveillance that contractor installed/ erected the structure for Smoking Shelter and Workshop Shelter Buildings.

• What’s the Galvanized Steel Structure?

• Galvanizing the process to apply the protective zinc coating at the steel structure/ equipment in order to protect the steel structure/ equipment from rust and corrosion. 

Smoking Shelter ( Exapmpleof Steel Structure)

• Corrosion of Steel Structure 

Some pictures of corrosion/ rusted appear on streel structure after some time of erection/ installation, it's the different reason for corrosion/ rust. 

Steel Structure 

Steel Structure 

Steel Structure 

Steel Structure 

• Does the galvanized steel rust?

• Yes, Galvanized steel resistant to rust corrosion depends on the type and thickness of the protective galvanized coating, but the type of corrosive environment is also a big factor.

• Factors that rust/ corrosion the galvanized steel structure/ equipment

• Sodium chloride (salt) in water or air
• Wet or soaked environments
• Relative humidity above 60%
• Plaster cement containing the chloride and sulfate
• Poor zinc coating at the structure
• Rainwater containing acid
• Acidic foods and drinks 

Steel Structure