Galvanization

Definition

Galvanization is the process of applying a protective zinc coating to steel or iron to prevent rusting. It involves immersing the metal in molten zinc to form a corrosion-resistant layer.

5 Must Know Facts For Your Next Test

1. Galvanization protects metals from corrosion by forming a physical barrier and providing sacrificial protection.
2. Hot-dip galvanizing is the most common method, where the metal is dipped into molten zinc.
3. The zinc coating reacts with oxygen and carbon dioxide in the air to form a strong, stable layer of zinc carbonate.
4. Galvanized steel is widely used in construction, automotive, and electrical industries due to its durability and longevity.
5. The effectiveness of galvanization depends on factors such as the thickness of the zinc coating and environmental conditions.

Review Questions

• What are the primary methods used for galvanizing steel or iron?
• How does galvanization protect metal from corrosion?
• In what industries is galvanized steel commonly used?

Related terms

Corrosion:

The gradual destruction of materials (usually metals) by chemical reaction with their environment.

Electroplating:

A process that uses an electric current to reduce dissolved metal cations so that they form a coherent metal coating on an electrode.

Anodizing: An electrochemical process that converts the metal surface into a durable, corrosion-resistant, anodic oxide finish.