Hydropower

Restore and protect fluid handling equipment in the hydropower industry from erosion, corrosion, and cavitation.
Where to Buy

Hydropower is a key source of renewable electricity and its plants can operate for several decades when maintained efficiency to high standards.

Water storage and fluid handling components comprising of penstock, wicket gates, turbines, and inlet valves are vital organs of a hydropower plant. During sudden changes in water flow, these components can suffer from corrosion, erosion and cavitation which hinders their operation.

Replacement of this equipment can lead to extensive downtime and some traditional repair methods may also see the problems reoccur.

Belzona has gathered decades of experience servicing equipment in the hydropower industry through providing a wide range of repair and maintenance solutions that are quick and easy to apply, safe and cost-effective compared to traditional methods, such as welding or the replacement of parts.

TYPICAL PROBLEMS

Typical problems in the facilities maintenance of hydropower plants include: damage and slip hazards on flooring, weathering damage of concrete structures, slippery transit areas, and roof leaks.

POTENTIAL SOLUTIONS

Belzona 3000 Series flexible membranes for the water and weatherproofing of roofs and roofing elements. Belzona 4000 Series magma quartz materials provide safety grip and slip resistance in the facility. Belzona 5000 Series fluid-grade environmental barriers for weather, corrosion and chemicals protection of floors and structures.

TYPICAL PROBLEMS

For wicket gates, typical problems include the deterioration of wicket gate blades, erosion, and corrosion and cavitation of wicket gates.

POTENTIAL SOLUTIONS

Belzona 1000 Series 100% solids rebuild and coat wicket gates for erosion and corrosion protection. Belzona 2000 Series elastomeric solutions offer abrasion and cavitation resistance.

TYPICAL PROBLEMS

Typical problems include the internal and external corrosion of the penstock and spiral casing. Other problems include the corrosion and wear of the pipe support areas.

POTENTIAL SOLUTIONS

Belzona 1000 Series 100% solids can be used to rebuild the penstock to its original profile and dimension with no hot work or distorting the substrate. The cold-applied materials in the 1000 Series can also help ensure high adhesion for bonding pipe supports while eliminating metal to metal contact and preventing future corrosion. Belzona 5000 Series environmental solutions can offer internal and external protection of metallic surfaces.

TYPICAL PROBLEMS

For inlet valves, typical problems include damage and loss of diameter of valve shaft, erosion and corrosion of the valve body, disc, and gasket.

POTENTIAL SOLUTIONS

Belzona 1000 Series 100% solids can be used to rebuild the valve shaft to its original diameter. Belzona 2000 Series elastomers can be used to coat the metals where durability, elasticity, high adhesion, and tear resistance are required.

TYPICAL PROBLEMS

Typical problems include: cavitation erosion on Francis and Kaplan turbine impellers, erosion and impact on Pelton turbine buckets, corrosion and erosion on the turbine housing and erosion of the nozzle head of turbines.

POTENTIAL SOLUTIONS

Belzona 1000 Series paste- and fluid-grade materials are used to rebuild and protect the equipment, offering excellent erosion protection and increased fluid flow efficiency. Belzona 2000 Series 100% solids cold-applied elastomers offer high cavitation resistance and are designed for applications in confined spaces. Belzona 5000 Series environmental solutions can offer internal and external protection of metallic surfaces.

TYPICAL PROBLEMS

Typical problems on the switchgear include the failure of the sealant between bolted flanges causing SF6 gas losses.

POTENTIAL SOLUTIONS

Belzona 1000 Series 100% solids paste- and fluid-grade surface-tolerant materials can seal joints and flanges while providing corrosion protection. Belzona 2000 Series 100% solids cold-applied flexible elastomers can be used to seal equipment leaks.

TYPICAL PROBLEMS

Oil and SF6 leaks and damage of transformer fins, flanges, gaskets, and insulators.

POTENTIAL SOLUTIONS

Belzona 1000 Series 100% solids paste-grade surface-tolerant materials can be used to stop oil and SF6 live leaks and to permanently seal them. Belzona 5000 Series fluid-grade environemtnal barriers can be used to protect corrosion and chemical attack.

TYPICAL PROBLEMS

For the dam, spillway and stilling basin, typical problems include: damage of the bearing surface, cracking, spalling of concrete substrate due to environmental impact, water ingress, and freeze-thaw cycles.

POTENTIAL SOLUTIONS

Deterioration of concrete surfaces caused by erosion can be repaired using Belzona 4000 Series non-porous magma quartz solutions which offer fast and durable repair to damaged concrete, especially for high wear areas such as baffle blocks.

Restore and protect fluid handling equipment in the hydropower industry from erosion, corrosion, and cavitation.

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