Galvanised steel water tank reline recently completed at a hotel in Bournemouth.
Our Galvanised Steel Water Tank Reline Process
The storage tanks existing epoxy coating had completely failed which exposed heavy corrosion deposits underneath.
Our operatives initially ensured the water tanks internal surfaces were extensively prepared by completely removing the existing epoxy coating.
All corrosion deposits were also removed, which in some areas exposed holes in the water tanks surface which required repairing as part of our preparation work.
With the storage tanks internal surfaces now fully prepared all critical areas such as joints and weakened areas were stripe coated and reinforced to help increase the water tanks structural integrity.
The final step involved the application of two coats of WRAS approved polyurethane which was applied to all internal surfaces of water tank.
Once cured, the storage tank was cleaned and disinfected prior to placing sites cold water services back online.
The Difference Between Epoxy Tank Coatings And Polyurethane Tank Coatings?
Epoxy coatings and polyurethane coatings are both popular choices for protecting and enhancing the surfaces of various materials, but they have distinct differences in terms of their properties, applications, and performance. Here’s an overview of the key differences between epoxy and polyurethane coatings:
Chemical Composition
Epoxy Coating: Epoxy coatings are made from epoxy resins and a curing agent (usually a hardener). When these two components are mixed, a chemical reaction occurs, forming a cross-linked, rigid polymer structure. This results in a tough and durable coating.
Polyurethane Coating: Polyurethane coatings are derived from polyurethane polymers. These coatings also undergo a chemical reaction between two components: a polyol and an isocyanate. The reaction produces a flexible, elastomeric polymer structure that can withstand a wide range of environmental conditions.
Appearance and Finish
Epoxy Coating: Epoxy coatings typically have a glossy finish that is smooth and visually appealing. They provide a high-gloss surface and are often used for decorative purposes.
Polyurethane Coating: Polyurethane coatings come in various finishes, including glossy, satin, and matte. They can provide a more versatile range of aesthetic options, and the finish can be customized based on the desired look.
Durability
Epoxy Coating: Epoxy coatings are known for their exceptional durability and resistance to abrasion, chemicals, and impact. They are commonly used in industrial and commercial settings where heavy traffic and harsh conditions are expected.
Polyurethane Coating: Polyurethane coatings are also durable but tend to be more flexible. They are particularly well-suited for applications where some degree of flexibility is required, such as for surfaces that may experience temperature variations or substrate movement.
Flexibility
Epoxy Coating: Epoxy coatings are relatively rigid and can become brittle over time when exposed to UV radiation. They may not perform as well on surfaces that experience constant flexing or movement.
Polyurethane Coating: Polyurethane coatings are more flexible and resilient. They can better accommodate substrate movement and expansion, making them suitable for applications where flexibility is important.
UV Resistance
Epoxy Coating: Epoxy coatings are generally less resistant to UV exposure and may yellow or degrade when exposed to sunlight. They are better suited for indoor or protected environments.
Polyurethane Coating: Polyurethane coatings have better UV resistance, making them suitable for both indoor and outdoor applications. They are less likely to yellow or deteriorate when exposed to sunlight.
In summary, epoxy coatings are known for their hardness and excellent chemical resistance, making them ideal for industrial and decorative applications in controlled environments. Polyurethane coatings, on the other hand, offer more flexibility, a wider range of finishes, and better UV resistance, making them versatile choices for both indoor and outdoor applications where some flexibility and durability are required. The choice between epoxy and polyurethane coatings depends on the specific needs of the project and the environmental conditions the coating will be exposed to.
If you require help with a similar galvanised steel water tank relining project, please do not hesitate to contact our team.
