Question

Explain in detail how galvanization works to prevent rusting.

Answer 1

Galvanization is the process of applying a protective zinc coating to steel or iron in order to prevent premature rust and corrosion. Proponents of galvanized steel, who may use it to construct or repair steel structures, for example, benefit from lower maintenance and repair costs because of its special properties.Without protection, steel will rust due to atmospheric conditions over time.

The corrosion of zinc is very slow, which gives it an extended life while it protects the base metal. Due to the alloying of the Zinc to the iron, cathodic protection occurs. This ensures that small areas of steel which may be exposed through damage are not compromised by rust. Unlike organic coatings, small damaged areas need no touch up. The cathodic protection will last as long as the zinc layer is present.

The primary advantages for using Galvanized are:

1. Lower cost than stainless.
2. Less maintenance/Lowest long term cost.
3. Long life expectancy.
4. Coating life and performance are reliable.
5. Outstanding resistance to mechanical damage.
6. Protection to small areas of steel exposed through damage.
7. No other coating can provide the same protection.
8. No lost time in surface preparation, painting and inspection.