Why do some repairs accelerate corrosion instead of preventing it? When a reinforced concrete structure is partially restored without proper precautions, corrosion can resume right next to the repaired areas. This well-known phenomenon, called induced anode or halo effect, is a major threat to infrastructure durability.
While traditional repair methods are not always enough, cathodic protection (CP), as defined by the EN ISO 12696 standard, provides a reliable barrier against corrosion and ensures long-term structural integrity. At BlueSpine, we design and manufacture high-performance cathodic protection systems, ranging from galvanic cathodic protection (GCP) to impressed current cathodic protection (ICCP).
⚠️ Induced Anode (Halo Effect): a hidden corrosion risk
Repairing a corroded area without protecting the entire structure creates a galvanic cell, accelerating the degradation of adjacent steel reinforcements.
During a conventional repair:
1️⃣ Damaged concrete is removed and replaced, restoring a high-alkalinity environment around local reinforcements.
2️⃣ Nearby steel remains embedded in deteriorated concrete, still exposed to chlorides or carbonation.
3️⃣ An electrochemical potential difference develops between repaired and unrepaired areas.
4️⃣ Corrosion shifts to unprotected steel, accelerating its deterioration.
Within 5 to 10 years, new cracks appear around the repaired areas. The better the repair, the stronger the induced anode effect, leading to severe structural damage.
🎯 How to Stop the Induced Anode Effect?
The most effective and durable solution is cathodic protection, compliant with the EN ISO 12696 standard. Unlike non-monitored galvanic anodes, this approach maintains a stable electrochemical balance and ensures long-term corrosion prevention.
🔎 Corrosion Protection Solutions
🟡 BSP10+: A First Line of Defense Against the Induced Anode Effect
If installing a fully regulated cathodic protection system is not immediately feasible, BSP10+ sacrificial zinc anodes provide a temporary solution to limit the halo effect.
✅ Reduces corrosion risk in adjacent areas by partially neutralizing the induced anode.
✅ Operates autonomously, without an external power supply, through natural galvanic action.
✅ Extends the lifespan of repairs, serving as a bridge before a more comprehensive solution is implemented.
However, this approach has limited long-term effectiveness and does not replace a fully standardized cathodic protection system.
🟢 What type of protection should you choose?
For durable protection over several decades, a cathodic protection system compliant with the EN ISO 12696 standard is essential.
BSP20+, BSP30+ and BSP50+ solutions allow those following results:
✅ Stops active corrosion and prevents further migration.
✅ Provides real-time performance monitoring, ensuring long-term efficiency.
✅ Significantly extends the lifespan of infrastructures, reducing maintenance costs over time.
🚀 Protect Your Structures with BlueSpine!
Don’t let your repairs accelerate corrosion! Discover BlueSpine’s cathodic protection solutions:
BSP10+ for immediate, easy-to-install protection.
BSP20+, BSP30+, and BSP50+ for long-lasting, standardized corrosion prevention.
📩 Contact us today to choose the best solution for your structure!
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