How To Prevent Rust In Air Compressor Tank

how to prevent rust in air compressor tank

An air compressor is a handy household tool that can be used to inflate tires, power air tools, as well as operate other equipment. The air tank is an essential part of the machine, as it stores compressed air but over time, the air tank can develop rust. This not only compromises the structure of the tank but this rust can also weaken the tank and cause it to eventually leak which can cause problems for your air compressor.

There are a few simple steps that can be taken in order to prevent rust in an air compressor tank and I will discuss them in detail so without any further ado let's take a look at these simple steps.

How Does The Rust Forms On Your Air Compressor?

Rust is one of the most common problems that people have with their air compressors. There are a few reasons why this happens, and understanding them can help you avoid the issue altogether. One reason why rust may form on your air compressor is because of the high humidity levels in the environment where it is stored. This can cause condensation to form on the metal surfaces of the compressor, which leads to rust formation.

Another reason for rust formation is improper storage of the air compressor so if it is not stored in a dry, ventilated area, then moisture can build up and cause rusting. Finally, if you do not properly maintain your air compressor, then it can also lead to rust formation. This includes things like not changing the oil regularly or not draining the tank after each use.

Ways To Keep Air Compressor Tank From Rusting:

If you have an air compressor, it's important to take steps to prevent the tank from rusting as rust can cause the tank to fail and leak, which can be dangerous. There are some things you can do to keep your air compressor tank from rusting such as:

Let's take a detailed look at each of them.

Draining Air Tank Regularly:

One of the most important maintenance step is to regularly drain the air tank of any water that has collected inside as this can help prevent rust from forming in the compressor tank, which can eventually lead to leaks. To drain the tank, first shut off the air compressor and release any pressure that may be inside and then, open the drain valve at the bottom of the tank and allow all the water to empty out.

Once it’s all gone, close the valve and restart the compressor. It’s a good idea to do this draining procedure more often if you live in a humid climate or if you use your air compressor a lot so by taking care of your air compressor tank, you can extend its lifespan and keep it working properly for years to come.

Using A Aftercooler:

An air compressor tank rusts when moisture in the air condenses inside the tank. This moisture can come from the atmosphere or from the compressed air itself. The water condenses on the walls of the tank causing it to start rusting and the best way to prevent an air compressor tank from rusting is to use an aftercooler.

An aftercooler is a device that cools down compressed air before it enters the storage tank so it will help in preventing the formation of condensation and thus reducing the risk of air tank rusting.

Routinely Checking:

An air compressor tank that has developed rust is a cause for concern. The rust can weaken the tank as well as cause it to fail and checking the air compressor tank regularly for rust can help prevent a potentially dangerous situation. If you have an air compressor, it's important to check the tank regularly for rust as the rust can weaken the tank and cause it to fail. In a worst-case scenario, a rusty air compressor tank could rupture, causing serious injury.

Fortunately, checking your air compressor tank for rust is easy to do. Simply inspect the outside of the tank for any signs of corrosion and it is also a good idea to check inside the tank for rust if you see any, have the tank replaced immediately.

Leave the Drain Open Between Each Use:

When using an air compressor, you can also leave the drain open so that any condensation or moisture can escape otherwise, the moisture will build up and cause rust on the tank. And it is also a common cause of rust in air compressor tanks is to leave the drain open when the compressor is not in use as this allows moisture to enter the tank and condense on the metal surface.

To prevent this from happening, make sure to keep the drain closed when not using the air compressor.

Can I Fix Air Compressor Tank Rust?

There are some ways to fix air compressor tank rust however, depending on the severity of the rust, it may be best to replace the air tank or you can directly contact the manufacturer to know what you can do about it.


It is important to take care of your air compressor tank to prevent rust and this can be done by simply following the above steps. If you do find rust in the air tank, then quickly change it or try to ask the manufacturer about it as it can cause leakage as well as other issues. Be sure to follow these steps to keep your air compressor in good working condition and if you found this article helpful then kindly share it with others and have a great day.

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