Galvanizing
| Formula / Notation | Zn(s) coated on Fe; Zn → Zn²⁺ + 2e⁻ (sacrificial anode) |
|---|---|
| Also Known As | Zinc coating, hot-dip galvanising, electrogalvanising, zinc plating (related) |
What is Galvanizing?
The process of applying a protective zinc coating to steel or iron to prevent rusting. Hot-dip galvanizing immerses the metal in molten zinc. Electrogalvanizing uses electrodeposition. Zinc acts as a sacrificial anode, protecting the underlying iron even when the coating is scratched.
Formula & Notation
Other Names / Synonyms: Zinc coating, hot-dip galvanising, electrogalvanising, zinc plating (related)
Properties & Characteristics
Uses & Applications
Safety Information
Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.
Key Facts
Frequently Asked Questions
The process of applying a protective zinc coating to steel or iron to prevent rusting. Hot-dip galvanizing immerses the metal in molten zinc. Electrogalvanizing uses electrodeposition. Zinc acts as a sacrificial anode, protecting the underlying iron even when the coating is scratched.
Galvanised steel is used in: outdoor structures (corrugated roofing, fencing, street furniture), automotive body panels (underbody), construction hardware (bolts, nails, scaffold), pipelines, and highway crash barriers. Hot-dip galvanised steel can last 50+ years in moderate environments.
Hot-dip galvanising involves molten zinc (~450°C) — severe burn and explosion hazard if any moisture contacts the molten metal. Zinc oxide fumes from galvanising operations cause metal fume fever (flu-like symptoms) with short-term exposure. Adequate fume extraction is mandatory.
The formula or notation for Galvanizing is: Zn(s) coated on Fe; Zn → Zn²⁺ + 2e⁻ (sacrificial anode)