Post-Tension Corrosion Protection | Prevent Cable Deterioration & Strengthen Concrete

The Problem: Corrosion in Post-Tension Cables & Structural Weakening

Post- and pre-tension reinforcement cables are vulnerable to corrosion at cable points and tensioned end plates. Despite protective grouting and concrete cover, moisture infiltration and chloride exposure lead to steel degradation, reduced load-bearing capacity, and hidden structural risks.

The Solution: Surtreat’s Post-Tension Corrosion Protection System

Surtreat provides a multi-step corrosion prevention and concrete strengthening system to ensure post-tension cables remain structurally sound:

TPS II: Penetrating silicate-based solution that strengthens concrete and protects embedded steel.
TPS XII: Vapor-phase corrosion inhibitor that migrates through concrete to prevent rebar and cable corrosion.
TPS XV DTM: Solvent-based vapor-phase inhibitor for deep penetration into ducts and cables.
Repel WB: Silane/siloxane water repellent that prevents moisture ingress and chloride attack.

Application Process: How to Protect Post-Tension Reinforcement Cables

Step 1: Tensioned Cable End Plate Treatment
- Inspect for concrete damage or steel corrosion.
- Remove rust and repair any damaged concrete.
- Apply TPS XII to concrete surfaces at 200 ft² per gallon and allow it to dry.
- Apply TPS II at 100 ft² per gallon to strengthen concrete and protect embedded steel.
- Apply Repel WB at 200 ft² per gallon to prevent future moisture ingress.
- Apply TPS XV DTM to steel end plates, focusing on high-risk areas.
- After drying, coat the steel surface with a two-part polyamide epoxy paint for extra protection.

Step 2: Bonded Cable Treatment
- Inject TPS XV DTM through injection ports at cable ends.
- If needed, drill small holes down to rigid plastic ducts and inject through metal tubes to reach cable surfaces.
- Treat the entire structure with TPS II, TPS XII, and Repel WB to strengthen surrounding concrete and prevent future moisture ingress.

Step 3: Unbonded Tensioned Cable Treatment
- Open flexible shrouds around unbonded cables for inspection.
- Use a pressure-resistant seal device to inject TPS XV DTM at multiple locations.
- Alternatively, drill holes to reach cable surfaces and apply inhibitor directly.

Results: Why Surtreat’s Post-Tension Corrosion Protection System Works

✅ Stopped Corrosion – TPS XII and TPS XV DTM effectively halt corrosion in steel cables.
✅ Strengthened Concrete – TPS II improves concrete density and reduces porosity.
✅ Long-Term Protection – TPS inhibitors prevent future corrosion, extending service life.
✅ Moisture Barrier – Repel WB blocks water infiltration, reducing repair frequency.
✅ Lower Maintenance Costs – Minimizes the need for emergency repairs and cable replacement.