How Long Does Galvanized Steel Last?

The impressive lifespan and durability of galvanized steel are responsible for its popularity. After shedding its brief experimental label in the early 1980s, the United States saw a resurgence of its use. Over time, galvanized steel has become a required standard for projects across the country.

Here’s a quick overview of the lifespan of galvanized steel, how it behaves within concrete, and why it is a solid choice for your construction project.

The Long Lifespan of Galvanized Steel

So, how long does it last? Galvanized steel has a decades-long lifespan. In various projects where galvanized rebar was re-exposed during repairs or upgrades, its condition surprised everyone. Often the protective coating had maintained like-new thickness or even became harder (more on that in the next section).

The 100 Year Bridge

Proponents of galvanized steel believe its true longevity has yet to be seen. This is because the projects which use it often need to be repaired or replaced for reasons other than the state of the galvanized materials. One of the most powerful statements about the material’s lifespan and durability came after the construction of the Governor Mario M. Cuomo Bridge across the Hudson River. The report on the project states the bridge should not need “major maintenance for at least 100 years.”

The main conclusion is that galvanized steel can last for decades without showing signs of compromise to its integrity.

How Galvanized Steel Acts in Concrete

Galvanized steel has become the preferred material for construction and transportation infrastructure projects. This is for two reasons: one is because of how easy it is to work with and transport. The other is because of how well it behaves in concrete.

Chemistry at Play in the Zinc Coating

When galvanized steel is introduced to fresh or new concrete, it forms a strong bond with it. This is different from its inferior alternative, epoxy-coated materials. Epoxy-coated materials sit within the concrete without adhering to it. Alternately, the bond the zinc coating forms with the concrete creates a partnership, rather than a resistance. This allows it to adapt better to the environment the concrete is in as well.

This adherence of the zinc coating to the surrounding concrete also strengthens the concrete. The zinc will enter the pores of the concrete which it touches and change its chemical make-up for the better.

Self-Healing Extends the Life of the Material

The self-healing property of the zinc coating makes it a good material to use within a concrete project. The properties of zinc allow it to build up extra rust resistance in compromised areas if they come into contact with water.

This is a major benefit for steel encased in concrete. It means that a compromised area will remain contained, rather than travel down the section of steel and cause greater damage. A small issue can remain a small issue without ruining the integrity of the total structure.

Galvanized Steel Materials For Your Upcoming Project

Whether a historic monument or essential portion of road, galvanized steel proves time and time again it is the best choice for structures that need to stand the test of time. It is a resilient problem-solver that will extend the life of any project that uses it.

If you need galvanized steel materials for your next construction project, we have a wide variety of the most common materials in stock. We have a simple ordering system with quick turnaround times.

Our galvanized materials include:

• Angles
• Flats
• Rounds
• Channels
• Pipe
• Tube
• Beams
• Rebar

As proud members of the American Galvanizers Association, we know how important it is to eliminate internal loading and handling costs. Save time and trips to the galvanizer by ordering pre-galvanized steel from South Atlantic. Get a quote now!