Corrosion is one of the most common reasons water tanks fail before the end of their lifespan. It affects structural integrity, contaminates stored water, increases maintenance costs, and in severe cases, leads to complete tank replacement.
For Australian facilities, where tanks operate under harsh UV exposure, temperature fluctuations, coastal salt environments, and mineral-rich water sources, corrosion prevention is essential.
This guide explains what causes corrosion in water tanks, the risks it creates, and the most effective methods to keep tanks corrosion-resistant for decades.
As a leading Australian tank specialist, Raven Tanks provides industry-grade solutions to prevent corrosion in commercial and industrial tanks of all sizes.
What Causes Corrosion in Water Tanks?
Corrosion can develop on any metal surface when environmental or chemical conditions accelerate material breakdown.
Unlike MIC corrosion (caused by bacteria), the common corrosion types below relate to chemical reactions, moisture exposure and material interaction.
- 1. Atmospheric Exposure: Moisture, oxygen, and airborne salts create ideal conditions for rust formation — especially in coastal regions of Australia.
- 2. Chemical Attack: Water containing minerals, chlorine, or cleaning agents can degrade tank surfaces over time.
- 3. Galvanic Corrosion: Occurs when two different metals come into contact in the presence of an electrolyte (such as water), causing one metal to corrode faster.
- 4. Pitting Corrosion: A highly localised form of corrosion that creates deep holes in metal surfaces, often going unnoticed until significant damage has occurred.
- 5. Protective Coating Breakdown: When tank liners, sealants, or coatings deteriorate, the exposed steel becomes vulnerable to rapid corrosion.
Risks of Corrosion in Water Tanks
Corrosion is not only a structural issue — it creates major safety and operational risks:
- Leaks and structural instability
- Contaminated potable or process water
- High repair and maintenance costs
- Loss of stored water
- Non-compliance with safety and industry standards
- Unexpected downtime and tank replacement
Early detection and professional maintenance are key to avoiding costly failures.
How to Prevent Corrosion in Water Tanks
1. Install High-Quality Tank Liners
A professionally installed tank liner creates a watertight barrier between the stored liquid and the tank’s internal structure.
Raven Tanks specialises in:
- potable water tank liners
- chemical-resistant liners
- industrial tank relining
- leak-prevention linings
Modern liners significantly extend tank lifespan and eliminate direct metal-to-water contact.
2. Apply Corrosion-Resistant Coatings
Epoxy coatings, polyurethane barriers, and industrial sealants protect internal and external tank surfaces from environmental and chemical exposure.
These coatings prevent rust formation and improve overall tank durability.
3. Routine Tank Inspections
Regular inspections help detect early signs of corrosion, coating failure, or pitting.
Raven Tanks conducts advanced inspection services including:
- internal condition assessments
- NDT (non-destructive testing)
- surface integrity checks
- leak detection
- roof and panel examinations
Routine inspections ensure issues are identified long before they become major failures.
Routine inspections also help identify less common forms of tank degradation, such as MIC corrosion, which cannot be detected through visual assessments alone. Facilities affected by this issue can refer to our dedicated resource on microbiologically influenced corrosion for detailed guidance.
4. Maintain Proper Water Quality
Imbalanced water chemistry can accelerate tank corrosion.
Proper monitoring helps stabilise:
- pH levels
- mineral content
- chlorine concentration
- temperature variation
Maintaining ideal water conditions protects your tank and extends lining lifespan.
5. Ensure Proper Ventilation and Access
Poor airflow contributes to humidity, condensation, and long-term surface deterioration. Correct ventilation design, hatches, and access systems reduce internal moisture levels.
6. Schedule Professional Reline or Refurbishment
When corrosion is identified early, refurbishment can restore tank integrity without full replacement.
Raven Tanks offers:
- tank relining
- panel replacement
- roof replacement
- structural repair
- complete refurbishment solutions
These services provide long-term protection and reduce the risk of future corrosion.
When corrosion has already compromised internal tank surfaces, early intervention is essential. In many cases, professional panel tank refurbishment restores the structure, prevents further deterioration and extends the tank’s operational lifespan.
Benefits of Corrosion-Resistant Water Tanks
Choosing corrosion-resistant materials, coatings, and liners delivers long-term value:
- extended tank lifespan
- protection from leaks and contamination
- reduced maintenance costs
- compliance with Australian standards
- safer storage for potable, process, and industrial water
- improved operational reliability
Corrosion prevention is always more cost-effective than major repairs or tank replacement.
Why Australian Facilities Choose Raven Tanks
Raven Tanks is trusted across Australia for delivering high-quality tank maintenance, lining, and refurbishment services. We work across commercial, industrial, fire, and potable water sectors.
Our team provides:
- custom corrosion-resistant solutions
- certified installation and refurbishment
- compliance with relevant Australian standards
- 24/7 availability for critical systems
- long-term warranties on materials and workmanship
Whether you need inspection, relining, or complete refurbishment, Raven Tanks ensures your water storage system remains protected for decades.
Conclusion
Corrosion is one of the leading causes of tank failure — but with the right protection methods, you can significantly extend your tank’s lifespan and improve water safety. Modern corrosion-resistant water tanks, supported by high-quality liners, protective coatings, regular inspections, and professional refurbishment, ensure long-term structural integrity and reliable performance.
For expert service across Australia, Raven Tanks provides industry-approved solutions tailored to your tank’s condition, operating environment, and long-term corrosion prevention strategy.
