Metal cabinets for data centers in a marine environment: why the C5-H cycle is fundamental

When designing metal cabinets intended to contain data center equipment, the choice of the surface protection cycle is not an aesthetic detail, but a critical factor of reliability and durability over time.

This is the case of this case history, which concerns the industrial painting of metal cabinets intended to be installed in a coastal area, characterized by high humidity, presence of salt and a highly corrosive atmosphere.

The application context: cabinets for data centers in marine areas

The customer – manufacturer of metal cabinets for data centers and IT infrastructures – had a very clear need:

• installation near the sea
• continuous exposure to salt and humidity
• need for long-term anti-corrosion protection
• operational continuity of the contained equipment
• compliance with high anti-corrosion standards

In these contexts, a standard painting is not sufficient: the risk of premature corrosion, film degradation and infiltration is high.

The solution: high resistance C5-H painting cycle

To meet these needs, a painting cycle compliant with the C5-H corrosivity class was adopted, the most severe required by the ISO 12944 standard for highly aggressive industrial and marine environments.

Why the C5-H class?

The C5-H (High Durability) classification is suitable for:

• marine and coastal environments
• industrial areas with aggressive atmosphere
• installations with long useful life (over 15–25 years)
• metal products critical for safety and continuity of service

In the case of data center cabinets, this means protecting not only the enclosure, but also everything inside it.

The painting cycle adopted

The C5-H cycle applied to metal cabinets included:

• Careful preparation of surfaces
• • mechanical cleaning of the metal surface
  • chemical cleaning and phosphating with zinc salts
  • removal of contaminants that could compromise adhesion
• Basic anti-corrosion treatment (cataphoresis)
• • high resistance protective layer
  • barrier function against humidity and saline agents
• Application of Primer HE with high edge coverage
• High performance final painting (powder coating)
• • controlled thickness
  • high resistance to salt spray and climate cycles
  • mechanical and chemical protection of the product

Each phase has been monitored and verified to ensure compliance with the required C5-H cycle.

The benefits for the final application

The adoption of a C5-H cycle made it possible to obtain:

• maximum anti-corrosion protection in a marine environment
• reduction of the risk of extraordinary maintenance
• greater reliability over time of data center cabinets
• indirect protection of equipment
• increase in the useful life of the finished product

For the customer, this translates into lower lifecycle costs and a product suitable for critical installations.

C5-H painting: a design choice, not just a production one

This case history demonstrates how the C5-H industrial painting is not a simple surface treatment, but a strategic design choice, especially for:

• electrical cabinets and for outdoor data centers
• metal carpentry in the coastal area
• industrial infrastructures exposed to aggressive agents

Relying on a partner with experience in highly corrosive cycles is essential to guarantee results consistent with expected performance.

Conclusion

In marine environments, corrosion is not an eventuality, but a certainty. The difference is made by the painting cycle chosen.

For applications such as metal cabinets for data centers installed near the sea, the C5-H cycle represents the reference standard for those seeking durability, reliability and long-term protection.