Rajan Wilcox
Fuel tank corrosion can be a serious issue, causing engine failure and costly repairs. It is important to address the problem as soon as it is identified to prevent further damage. This can be done by using a tank cleaner to remove dirt, debris, and old fuel, followed by a rust remover to eliminate rust and leave the tank ready for sealing. The sealant is a crucial step as it provides a protective layer, preventing future rusting. It is also important to regularly dewater tanks to prevent water build-up, which can lead to corrosion.
How to Remove Corrosion from a Fuel Tank
| Characteristics | Values |
|---|---|
| Prevention | Keep the tank full, especially during the summer months, to reduce the space for air, humidity, and condensation. Dewater the tank every six months to prevent water build-up, which can lead to corrosion. |
| Tools | Fuel storage tank cleaner, rust remover, sealant, repair kit, pump, bucket, gloves, eye protection |
| Rust Removers | Vinegar (30% strong or diluted), Evaporust, diluted muriatic acid, KBS Coatings' KBS Tank Sealer System (includes KBS Klean, RustBlast, and Gold Standard Tank Sealer) |
| Process | Remove existing fuel using a pump and store it in a bucket. Fill the tank with rust remover and water, and let it soak for 45 minutes to a few hours. Drain the tank and fill it with loose nuts, bolts, or gravel, add water, and shake the tank to scrub off rust. Repeat the process for a second soak if needed. Rinse the tank with clean water and baking soda to neutralize the acid, then thoroughly dry the tank. |
| Post-Treatment | Apply a sealant to provide a protective layer and prevent future rusting. |
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What You'll Learn
Use a rust remover to clean the tank
Rust in your fuel tank can cause serious damage and lead to fuel contamination, so it is important to use a rust remover to clean the tank. Firstly, you will need to remove the tank and drain it of any fuel. It is important to have a bucket ready to safely capture this fuel. You can then begin the process of removing the rust.
There are a few different rust removal products available. One option is to use a KBS Coatings Tank Sealer System, which includes KBS Klean, RustBlast, and Gold Standard Tank Sealer. To use this system, you will first need to mix the KBS Klean with water and pour it into the tank. Then, place some metal objects, such as nuts and bolts, into the tank and shake it up. Let the solution soak for 45 minutes, then flush with water. Repeat this process as many times as needed. The next step is to use RustBlast, which will dissolve rust and corrosion from the inside of the tank. Pour RustBlast into the tank and leave the metal agitators inside. Shake the tank thoroughly and let it soak for about 45 minutes, rotating the tank every 10 minutes or so.
Another option for a rust remover is to use vinegar or muriatic acid. Fill the tank with vinegar or diluted muriatic acid, add water, and let it sit for a couple of hours. After the first soak, drain the tank and fill it with loose nuts and bolts or gravel. Add some water and shake the tank to scrub off any remaining rust. Drain the tank again and refill it with vinegar or acid for a second soak. Finally, drain the tank and refill it with clean water and baking soda to neutralize the acid. Drain and rinse the tank, then verify the amount of rust removed.
After using a rust remover, it is important to thoroughly dry the tank before applying a sealant to prevent future rusting.
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Seal the tank to prevent future rust
To prevent future rust, it is important to seal the tank after removing corrosion. This can be done using a sealant product such as Gold Standard Tank Sealer, which is designed to coat the inside of metal, aluminium, and fibreglass tanks. The sealant forms a tough, fuel-impervious seal, preventing the fuel from touching the inside walls of the tank and creating a barrier against rust and corrosion.
Before applying the sealant, it is crucial to ensure that the tank is thoroughly cleaned and dried. This includes removing any residual fuel, dirt, debris, and old fuel using a tank cleaner. A rust remover can then be used to eliminate rust and corrosion, leaving the tank ready for the sealant application. It is important to follow the manufacturer's instructions for the specific sealant product being used, as application methods may vary.
One recommended product is the KBS Tank Sealer System, which includes KBS Klean, a powerful cleaner that removes soil and varnish without leaving harmful residues. The system also includes RustBlast, a rust remover that dissolves rust and corrosion and leaves a zinc phosphate coating to ensure a strong bond with the tank sealer. This two-step process prepares the tank for sealing, ensuring that all contaminants are removed and the surface is properly etched for a durable finish.
After the cleaning and rust removal process, the tank should be thoroughly dried using a heat gun or blow dryer to ensure no moisture remains. Once the tank is completely dry, the sealer can be applied. It is important to follow the manufacturer's instructions for the specific sealer product, as application methods may vary. The sealer should be left in the tank for the recommended amount of time, frequently rolling or rotating the tank to ensure that all interior surfaces are coated.
Additionally, it is important to take preventive measures to avoid future corrosion. This includes keeping the tank full, especially during the summer months, to reduce the amount of air and the chances of humidity and condensation. Regular maintenance and inspections can also help detect early signs of corrosion, allowing for prompt repair and preventing further damage.
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Regularly dewater the tank to prevent water build-up
Dewatering a fuel tank is a crucial step in preventing water build-up and subsequent corrosion. This process should be done regularly, ideally every six months, to proactively address any potential issues. Here's a detailed guide on how to do it:
First, it's important to understand that water often accumulates in fuel tanks during warmer months due to heat gain and evaporation. This can lead to bacterial contamination and corrosion, especially in steel tanks. To remove this water build-up, you can use a valve system. Ensure that the valve remains shut unless you are removing uncontaminated water from the tank. Another method is to dewater at outlet pipes, such as using a bung fitted ¼ inch from the bottom of the tank. This allows water to escape while keeping the oil contained.
Additionally, it is recommended to keep your fuel tanks full, especially during the summer. This reduces the space for air, thereby decreasing the chances of humidity and condensation. By minimizing condensation, you directly reduce the likelihood of water build-up, which can lead to corrosion.
If you notice any signs of corrosion or contamination, it's crucial to address them immediately. Source the issue, diagnose the problem, and make the necessary repairs. This proactive approach can prevent further complications and ensure the longevity of your fuel tank.
Finally, consider using a fuel tank sealant product, such as the KBS Fuel Tank Sealer System, to protect your tank from future corrosion. This system includes a cleaner, a rust remover, and a sealant to thoroughly clean, de-rust, and seal your fuel tank, preventing future issues.
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Use a tank cleaner to remove dirt, debris, and old fuel
To remove corrosion from a fuel tank, you will need to use a tank cleaner to get rid of dirt, debris, and old fuel. This is a crucial step in the process as it ensures that contaminants and loose debris, such as rust and sediment, are removed before the next steps. If left in the tank, these contaminants can cause serious issues, such as clogging the filter, jamming the turbine pump, or reducing fuel flow due to build-up.
Firstly, disconnect the tank from the motorcycle or other machinery. For lawnmowers and similar items, you will need to remove the fuel line and spark plugs. For motorcycles, remove the petcock, gas cap, and all hoses attached to it. Seal the fuel line to prevent residual gasoline, dirt, or other objects from entering the fuel line and causing engine problems.
Next, drain the tank of all fuel. If your tank has a drain cock, you can drain the fuel through that. Otherwise, you can drain the fuel by removing a gas line or by siphoning it. Place the drained fuel into an approved container or fuel caddy.
Now, you can begin the cleaning process. You can use a product like Berryman B-12 Chemtool Fuel System Cleaner, or KBS Klean, which is a powerful cleaner that removes dirt, debris, and old fuel without leaving harmful residues or emitting noxious fumes. KBS Klean is designed to be diluted with hot water and left to soak in the tank for 45 minutes. Then, flush the tank with water until suds stop coming out. Repeat this process as many times as needed.
After cleaning, it is important to dry the tank completely before reattaching it. You can use compressed air or a heat gun/blow dryer to ensure the tank is completely dry.
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Prevent condensation by keeping the tank full
Keeping your fuel tank full is a great way to prevent condensation and water build-up, which can lead to corrosion. This is especially important during the summer months when heat gain and evaporation cause tanks to "breathe", resulting in water and bacterial microbial contamination. By keeping your tank full, you reduce the amount of air inside, which in turn reduces the chances of humidity and condensation.
This method is simple yet effective and can help to prevent the need for more intensive measures to remove corrosion. It is a proactive approach to corrosion prevention, ensuring that your fuel remains stable and less likely to become contaminated.
It is worth noting that this method is most effective when combined with other corrosion prevention strategies. For example, it is important to regularly dewater your tank to remove any water build-up that may occur. This can be done by fitting a valve or outlet pipe to remove uncontaminated water from the tank. Additionally, early detection of contamination is key, so regular checks and maintenance are recommended.
By keeping your fuel tank full and implementing these additional measures, you can effectively prevent condensation and reduce the risk of corrosion. Taking these proactive steps will help to maintain the integrity of your fuel and ensure the optimal performance of your equipment.
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Frequently asked questions
Removing corrosion from a fuel tank is a multi-step process. First, remove the existing fuel from the tank. Next, fill the tank with a rust remover such as vinegar, diluted muriatic acid, Evaporust, or a product like KBS Klean. Let the solution sit for at least 45 minutes, then drain the tank and fill it with loose nuts and bolts or gravel. Add some water and shake the tank to scrub off any remaining rust. Drain the tank again, then refill it with clean water and baking soda to neutralize the acid. Finally, dry the tank thoroughly using a heat gun or blow dryer.
There are several products available to remove corrosion from fuel tanks. Some common options include:
- Vinegar
- Muriatic acid
- Evaporust
- KBS Fuel Tank Sealer System (which includes KBS Klean, RustBlast, and Gold Standard Tank Sealer)
- Gold Standard Tank Sealer
To prevent corrosion in your fuel tank, it is important to regularly remove rainwater and detect and repair any issues early on. Keeping your fuel tank full, especially during the summer months, can also reduce the chances of humidity and condensation, which can lead to corrosion.
