Water tanks are a valuable asset, indispensable for residential and commercial use. But, as with any other metal object in contact with water, they can corrode over time. Take note that a corroded water system can result in poor water quality, bad water taste, and health problems. And if not given enough attention, corrosion can eventually lead to complete water tank failure.
The good news is that corrosion in metal water storage tanks can be prevented—or at the very least, minimized—to ensure your tank remains in optimal working condition. As the saying goes, prevention is better than cure, so it’s always wise to take proactive measures. By implementing the right strategies, you can effectively protect your tank from corrosion-related damage.
In this article, we’ll explore the best ways to prevent corrosion in metal water storage tanks. Be sure to take notes on these essential tips to keep your structures well-maintained and corrosion-free!
What is Tank Corrosion?
Tank corrosion occurs when a metal surface breaks down due to electrochemical reactions between the metal and the surrounding soil or groundwater. In simpler terms, the tank material becomes dissolved in the water inside the tank and causes damage to the tank itself.
According to Environmental Protection Agency (EPA), approximately half of all underground storage tanks corrode to some degree by the time they reach 15 years of age.
What Causes Corrosion in Water Tanks?
When you think back to your chemistry lessons, you might recall that metals, including steel, undergo chemical reactions when exposed to water and oxygen. These reactions trigger chemical changes, leading to corrosion.
Here are some of the main causes of corrosion in water storage tanks with metal structures:
Oxidation
Oxidation is one of the most common reasons for metal corrosion in water tanks. It occurs when oxygen in the water reacts with the metal, causing it to deteriorate. There are two primary types of oxidation: galvanic corrosion and chemical oxidation.- Galvanic corrosion happens when dissimilar metals come into direct contact, often in the presence of an electrolyte like water.
- Chemical oxidation occurs when metal ions interact with oxygen in the air, leading to material breakdown.
Rust Formation
Rust forms when iron reacts with air or water, causing a chemical transformation into iron oxide, commonly known as rust. Over time, this rust accumulates, weakening the metal’s surface, creating holes, and leading to potential leaks and structural damage.Carbonation
Corrosion can also occur due to the presence of carbon dioxide in water. Carbonation reduces the natural alkalinity of concrete, which is commonly used in water tank structures. This process happens when carbon dioxide from the air dissolves into the concrete’s pore water, forming weak carbonic acids that break down the cement paste, potentially leading to further deterioration.
How to Prevent Corrosion in Water Tanks?
Even though there is a big chance that the tank will corrode and cause significant damage, there is always a way of preventing it from happening. You heard it right! Don’t panic, and follow these tips.
- Make sure that tank is installed correctly.
Ensure your tank’s cap is correctly sealed so that groundwater cannot leak into the tank. Also, check the seams of the tank to ensure there is no leakage.
- Always have it inspected right away.
Whenever equipment or parts are not functioning, make it a habit of letting the professionals check it.
- Keep Your Tank well-maintained
When performing routine maintenance on your tank, make sure that you follow the manufacturer’s instructions exactly and do not overfill the tank.
- Make sure that all safety valves are installed and working accurately.
The valves will prevent water from overflowing from the tank in the event of a malfunction or emergency.
- Look for bulging or leaking joints.
Look for any stains around your tanks or any bulging or leaking joints. Always note this because this indicates a clear sign of corrosion. You should always regularly inspect your tanks.
To prevent any further damage from occurring and make sure that you can keep your tank in tip-top shape, always be vigilant and responsible!
Storage Tank Preservation? We got You Covered!
Protecting your tank from any damage is such a huge responsibility. There is a lot to consider, and there is a lot to adhere to. If you think tank inspection and maintenance is too daunting of a task for you to tackle on your own, worry not though because there’s always a professional water tank service company that can efficiently do the job for you.
Here at Raven American Tanks, we make sure to prioritize our client’s satisfaction. We have provided quality service over two decades regarding industrialized and commercial tanks and tank liners. As licensed providers, we can guarantee that we meet the requirements of the international standard for protection and safety.
We are always keeping up with innovations! Call us today and let us know how we can assist you!
