protect steel bridges

How do we protect steel bridges from corrosion?

First, to protect steel bridges from corrosion, let us understand how corrosion weakens bridges!

Corrosion often happens for steel bridges when atmospheric situations, such as salt, dampness, and oxygen, come in contact with steel. Transport agencies use a steel safety coating to prevent bridges’ deterioration.

Corrosion is an electrochemical procedure that damages as well as also destroys metal. Steel bridges include hundreds of metal elements, are subject to aspects, and are particularly vulnerable to deterioration.

The energies attached to bridges, frequently housed in custom pipes, are additionally susceptible to corrosion gradually.

Very few bridge corrosion protection strategies work for them in the long run. We have successfully tested and implemented our modern corrosion protection systems to conform to international codes.

Just look at the world’s developed countries. Their infrastructure has some of the best structural steel protection systems preventing RCC steel rust.

Their infrastructure should convey to us the importance of corrosion prevention and reinforcing our nation’s infrastructure.

When you type the query – how to protect steel bridges from corrosion on Google, you will find a list of questions appearing in its search results.

How can you protect a steel bridge from rusting?

How do you protect a bridge from corrosion?

How can you prevent steel from rusting?

What is the best rust inhibitor?

What is the best coating for steel?

What is corrosion, and how can it be prevented? 

Why are steel bridges painted and not Galvanised to protect them from corrosion?

How often do steel bridges need maintenance?

Which corrosion prevention method is used to reduce the maintenance cost of highways and bridges?

What are the ways to prevent bridges from corrosion?


You will find the answer to all the above questions below.

Given below is a 3-step simple application system to protect steel bridges from corrosion:

Application of Rust Remover:

  • Clean the steel surface by mechanical means such as shot blasting to remove all loose rust/paint, etc.
  • Apply a single-component rust converter/passivator by brush or roller.
  • After 24 hours, remove the free/loose rust particles by dusting them with a brush.

Application of epoxy coat as a primer:

  • Mix two Resin and one part of the Hardener in a clean container.
  • Mix both parts thoroughly using a slow-speed mechanical stirrer to attain uniform consistency.
  • Apply one coat of thermosetting epoxide polymer with substituted long-chain nylon reticulate-based coating/primer on the structural steel surface with the help of a brush, roller, or spray machine.

Application of High-Performance UV Resistant APR coating:

  • After the primer coat application, apply two coats of UV and chemical-resistant, two-component, acyclic polyisocyanatereticulant(APR) based polyurethane coating.
  • Mix four of the Resin and one of the Hardeners in a clean container.
  • Mix both parts thoroughly using a slow-speed mechanical stirrer to attain uniform consistency.
  • Apply the coats by brush or roller or spray at 4-6 hours intervals between each coat.
  • Ensure that the surface is dry while applying the second coat.
  • Ensure no pin holes are left out.