In general, galvanised steel is less expensive than stainless steel. ... While the galvanisation process helps protect against rust and provides corrosion resistance, it's important to note that it eventually wears away, particularly when exposed to high levels of acidity or to salt water.

How long does it take for galvanized steel to rust?

The zinc coating of hot-dipped galvanized steel will last in the harshest soil is 35 to 50 years and in less corrosive soil 75 years or more. Although humidity affects corrosion, temperature itself has less of an impact.

How do you keep galvanized steel from rusting?

Galvanizing

Galvanizing is a method of rust prevention. This is accomplished through hot-dip galvanizing or electroplating. The iron or steel object is coated in a thin layer of zinc. This stops oxygen and water from reaching the metal underneath but the zinc also acts as a sacrificial metal.