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Corroded Water Tanks - Causes & Solutions

Water tanks are essential for storing and supplying clean water for various purposes, from drinking and cooking to bathing and irrigation. However, over time, water tanks can develop corrosion, which not only affects the quality of stored water but also shortens the tank's lifespan. In this blog post, we will explore the causes of corroded water tanks and provide practical solutions to address this issue. Corrosion can also lead to costly leaks and spills, so it's crucial that a solution is implemented as soon as possible.

Water Tank Corrosion

Understanding Water Tank Corrosion

Corrosion is a natural process that occurs when metal interacts with its environment. In the case of water tanks, it involves the degradation of the tank's material, which is often metal, due to chemical reactions with water and other substances. Corrosion can lead to structural damage, leaks and contamination of the stored water.

Causes Of Water Tank Corrosion

Several factors contribute to water tank corrosion:

  • Water Quality - The quality of the water stored in the tank plays a crucial role. Water with high levels of dissolved minerals, such as iron, manganese, and calcium is more corrosive. Acidic or alkaline water can also accelerate corrosion.

  • Oxygen - Oxygen in water can lead to the formation of rust (iron oxide) on metal surfaces. This process, known as oxidation, weakens the tank material over time.

  • Microbial Growth - Certain types of bacteria can thrive in water tanks and produce corrosive by-products. These microorganisms create an environment prone to corrosion.

  • Temperature Fluctuations - Rapid temperature changes can cause expansion and contraction in the tank material, creating stress and potential weak points where corrosion can occur.

  • Mechanical Damage - Physical damage to the tank, such as dents, scratches, or cracks, can expose the underlying metal to corrosion agents.

Inside Of Water Tank

Effects Of Corroded Tanks On Water Quality

Corroded water tanks can have severe consequences for water quality, including:

  • Unpleasant taste and odor.

  • Presence of rust particles in the water.

  • Discoloration of water.

  • Increased microbial contamination risk.

  • Reduced tank capacity due to rust build-up.

Solutions To Prevent Water Tank Corrosion

  • Regular Maintenance: Implement a regular inspection and maintenance schedule to identify and address corrosion issues promptly. Clean the tank, remove sediment, and repaint the exterior when needed.

  • Proper Coating and Linings: Apply corrosion-resistant coatings and linings to the interior and exterior of the tank. These coatings act as a barrier between the metal and the corrosive environment. We have over 12 years of experience carrying out this service and offer all clients a 10 year guarantee for their reline!

  • Selecting the Right Tank Material: When installing a new water tank, choose materials that are less prone to corrosion, such as stainless steel or glass-reinforced plastic (GRP).

  • Monitoring Water Chemistry: Regularly test and monitor the water chemistry inside the tank. Adjust water treatment processes as necessary to maintain optimal pH levels and prevent aggressive water conditions.

Seek Support From The UK's Leading Water Tank Experts

Don't let corrosion compromise the integrity of your water supply. By understanding the causes and implementing the right solutions, you can enjoy the benefits of a well-maintained and long-lasting water tank. For a prompt fix to your corroded water tank, our team of experts are available throughout the United Kingdom to survey your tank and implement a bespoke resolution. Whether it's relining, a repair or a full water tank replacement, we know what it takes to get the job done right. Visit our contact page to kickstart your project and get the quality you deserve!


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