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Corrosion Mitigation

Corrosion Mitigation

Corrosion Mitigation for Durable Structures

Corrosion mitigation plays a vital role in preserving the structural integrity and durability of reinforced concrete structures. In concrete, steel reinforcement is normally protected by the highly alkaline environment created by the cement paste. However, when this protective environment is disturbed which occurs due to reduced pH levels, moisture ingress, oxygen exposure, or the presence of chloride ionsβ€”the steel reinforcement becomes vulnerable to corrosion. Over time, it results into cracking and spalling of concrete, exposing the corroded steel and gradually the structure becomes weak.

Effective corrosion mitigation focuses on identifying early stages of deterioration and taking timely protective measures to prevent the damage in future. By using scientifically developed protection systems and suitable treatment methods, corrosion control helps to maintain structural safety, extend the service life and protect valuable infrastructure assets.

TECHNIQUES

TECHNIQUES

Corrosion Mitigation

Advanced Corrosion Protection Techniques

Protecting reinforced concrete from corrosion requires a specialised technology that helps in preventing deterioration and preserve structural stability. Our approach to corrosion protection is to combine electrochemical systems, protective coatings, and advanced material technologies to effectively control and reduce corrosion in reinforced concrete structures. These solutions help in protecting the steel reinforcement from changing environmental conditions while limiting the effects of moisture and chloride penetration that can initiate corrosion.

By selecting the most suitable protection methodology for each structure, it helps to slow down corrosion. This approach helps in improving the durability and supports the long-term performance of the vital infrastructure.

Corrosion Mitigation

Our Approach to Corrosion Mitigation

Our approach to corrosion mitigation usually starts with a detailed assessment of the structure in order to understand the extent of reinforcement deterioration and what are the factors that contribute to it. Based on these findings, development of targeted protection strategies is made that address both the visible damage and the underlying causes of corrosion.

By combining advanced protection systems, advanced materials, and proven engineering practices, we help safeguard reinforced concrete structures from further deterioration. This approach improves durability, protects structural stability, and significantly extends the service life of the structure.

Corrosion Risk Assessment
SSPL’s team conducts a systematic electrochemical survey mapping corrosion activity, contamination levels, and exposure severity. Half-cell potential mapping identifies zones of active and passive corrosion. Concrete resistivity testing quantifies ionic transport rate. Chloride profiling at multiple depths establishes the ingress front and residual time to corrosion initiation in unaffected zones. Carbonation depth is measured to assess depletion of the concrete’s passivating alkalinity.
Survey data is interpreted to determine the active corrosion mechanism: chloride-induced pitting corrosion, carbonation-induced general corrosion, or stray current corrosion. This distinction governs the selection and design of the protection system. Incorrect mechanism identification is the most common cause of protection system underperformance.
SSPL engineers design the protection system around the confirmed mechanism, the extent of active corrosion, the structural geometry, and the target service life. For chloride-contaminated structures, ICCP or SACP systems are designed to the current density criteria of BS EN ISO 12696. For carbonated concrete, re-alkalisation is specified. For at-risk but unaffected structures, surface-applied inhibitors or barrier systems may be designed as a cost-effective preventive intervention.
All protection system installation is carried out by SSPL’s in-house teams. ICCP anode systems are installed to ensure uniform current distribution across the protected reinforcement zone. Reference electrodes are embedded at critical monitoring points. On completion, the system is commissioned with current output adjusted to achieve the specified protection criteria across the full reinforcement network.
Cathodic protection systems require active monitoring to confirm protection criteria are sustained and to allow for adjustments as the electrochemical environment changes over time. SSPL provides structured monitoring programmes covering potential decay measurements, instant-off potential readings, and current output recording, evaluated against BS EN ISO 12696 acceptance criteria and reported to the asset owner with recommendations.

PROJECTS

Highlights

NAVI MUMBAI

Largest Marine Structure Repair Project in India

From diagnostics, repairing, retrofitting to fireproofing, SSPL has been actively reinforcing Indian infrastructure for over 30 years. Having successfully completed over 1000 projects across India..