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METALNASTRI 1
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METALNASTRI 1
Product catalog summary
Introduction
Corrosion is a significant factor in the deterioration of reinforced and pre-stressed concrete structures globally. As the number of such structures increases, there is a growing need for cost-effective maintenance solutions. Cathodic protection (CP) has proven effective over the past 30 years in preventing corrosion caused by chlorides and carbonation in concrete.
Corrosion is a significant factor in the deterioration of reinforced and pre-stressed concrete structures globally. As the number of such structures increases, there is a growing need for cost-effective maintenance solutions. Cathodic protection (CP) has proven effective over the past 30 years in preventing corrosion caused by chlorides and carbonation in concrete.
Corrosion Mechanism
Chloride salts in concrete can compromise the passivation layer on steel reinforcement, leading to local corrosion cells. Anodic locations, where corrosion occurs, convert steel into iron oxides, causing pressure and potential cracking of the concrete cover, ultimately weakening the structure.
Chloride salts in concrete can compromise the passivation layer on steel reinforcement, leading to local corrosion cells. Anodic locations, where corrosion occurs, convert steel into iron oxides, causing pressure and potential cracking of the concrete cover, ultimately weakening the structure.
Standards and Procedures
The European standard ISO 12696 outlines the principles of CP for steel in concrete. CP aims to suppress steel corrosion by applying an external current. This can be achieved through impressed current cathodic protection (ICCP) or galvanic anodes.
The European standard ISO 12696 outlines the principles of CP for steel in concrete. CP aims to suppress steel corrosion by applying an external current. This can be achieved through impressed current cathodic protection (ICCP) or galvanic anodes.
Galvanic Cathodic Protection (GACP)
GACP uses zinc anodes to provide the necessary current for protection. The concrete's pore solution acts as an electrolyte, allowing ion flow. GACP systems are simple, reliable, and require less maintenance compared to ICCP, as they do not need extensive wiring or power supplies.
GACP uses zinc anodes to provide the necessary current for protection. The concrete's pore solution acts as an electrolyte, allowing ion flow. GACP systems are simple, reliable, and require less maintenance compared to ICCP, as they do not need extensive wiring or power supplies.
Conclusion
GACP systems offer a viable alternative to ICCP, with advantages in simplicity and reduced maintenance needs, making them an attractive option for protecting steel in concrete structures.
GACP systems offer a viable alternative to ICCP, with advantages in simplicity and reduced maintenance needs, making them an attractive option for protecting steel in concrete structures.
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Catalog excerpts
GALVANIC CATHODIC PROTECTION OF STEEL IN CONCRETE METALNASTRI ANTICORROSION SYSTEMS
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Corrosion is recognized as one of the major contributors to the deterioration of reinforced and pre-stressed concrete structures worldwide. The amount of reinforced concrete structures world-wide is growing rapidly and therefore so is the increasing necessity of easily applied low-cost maintenance programs. Over the last 30 years, cathodic protection (CP) has been shown to be a highly effective technique in preventing concrete deterioration from chloride induced and carbonated concrete corrosion. The presence of chloride based salts within the concrete can be a threat to the passivation layer...
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