Chemical Protection of Concrete Tank Base within Secondary Containment

KHIA ID: 10354
Industry: Power (POWR)
Application: TCC-Tanks and Chemical Containment Areas (TCC)
Substrate: Concrete
Customer Location: Fort Pierce, Florida
Application Date: September 2026
Products: Belzona 4311 (Magma CR1),Belzona 4911 (Magma TX Conditioner)
Problem: The concrete base supporting a 98% sulfuric acid tank is located within the secondary containment area and required additional chemical protection. In the event of a leak or spill, concentrated sulfuric acid could attack and deteriorate the unprotected concrete, potentially affecting the integrity of the tank base and the surrounding containment area.
Prepared concrete tank base inside secondary containment before Belzona 4911 and 4311 application.

Prepared concrete tank base within the secondary containment area prior to application of the Belzona chemical protection system. The surface was prepared in accordance with the Belzona 4311 IFU before conditioning with Belzona 4911.

Belzona 4911 conditioner being applied to prepared concrete before Belzona 4311 coating.

Belzona 4911 being brushed into the prepared concrete substrate to condition the porous surface prior to application of the Belzona 4311 chemical-resistant coating system.

First coat of Belzona 4311 applied to the conditioned concrete tank base.

First coat of Belzona 4311 applied over the conditioned concrete tank base, creating the initial chemical-resistant barrier within the secondary containment area.

Completed Belzona 4311 protection on the concrete tank base inside the sulfuric acid secondary containment.

Completed application of the Belzona 4311 chemical-resistant coating system on the concrete tank base, providing continuous protection within the secondary containment area beneath the 98% sulfuric acid tank.

Application Situation
The objective was to provide a chemical-resistant protective barrier over the existing concrete tank base, which forms part of the secondary containment area. Because the base is located beneath a 98% sulfuric acid tank, the Belzona system was selected to provide additional chemical protection against potential leaks or spills while allowing the existing concrete structure to remain in service.
Application Method
Surface preparation was completed strictly in accordance with the Belzona 4311 IFU requirements. The concrete substrate was prepared to provide a clean, firm, dry, and well-roughened surface. The prepared concrete was then conditioned with Belzona 4911, which was thoroughly worked into the porous substrate. Following conditioning, two coats of Belzona 4311 in the same color were applied to create a continuous chemical-resistant protective barrier over the concrete tank base.
Belzona Facts
Belzona 4911 was used to properly condition the porous concrete substrate before coating, as required by the Belzona 4311 IFU. Two coats of Belzona 4311 were then applied to provide chemical protection to the concrete base located beneath the 98% sulfuric acid tank, enhancing the chemical protection provided within the existing secondary containment area.
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