Distributed Anode System Embedded in Concrete Overlays, Encapsulated Inside Reinforced Concrete Jackets, or used in Conjunction with Stay-in-Place Forms to Provide Corrosion Control or Cathodic Protection When two dissimilar metals are coupled together in an electrolyte, the metal with the higher potential for corrosion (more electronegative) will corrode in preference to the more noble metal. In concrete applications, the Sika Galvashield DAS anode unit corrodes in favour of the reinforcing steel and produces an electrical current that mitigates corrosion activity. Sika Galvashield DAS is a Distributed Anode System that is quickly and easily installed to provide corrosion protection for a variety of applications, such as installation in new concrete, embedded in concrete overlays, encapsulated inside reinforced concrete jackets, or used in conjunction with stay-in-place forms for column protection. The Sika Galvashield DAS System comprises of a high-purity zinc core cast inside alkali-activated mortar with an internal pH >14 which keeps the zinc active over the life of the anode. The anode size, electrical components and installations procedures are customised to meet specific project requirements. These long strip anodes are quickly and easily distributed over the surface of a concrete or masonry structure and connected to the reinforcing steel using tie wire connections. They can also be used for targeted protection, such as bridge widening and at new and old concrete interfaces. Once installed, the zinc anode corrodes preferentially to protect the adjacent reinforcing steel. For applications where anodes will be submerged, or subjected to todal conditions (e.g. marine piles), use Sika Galvashield DAS-X anodes. - Proven technology - supported by independent testing.
- High capacity - can provide more zinc and more current output than many other galvanic anode systems.
- Design flexibility - anode design and spacing can be customised to meet project specific cathodic protection performance requirements and service life objectives.
- Versatile - can be used for both conventionally reinforced, prestressed or post-tensioned concrete.
- User friendly - installation is quick and easy, requiring no specialised equipment.
- Low maintenance - requires no external power source or system monitoring.
- Measurable - system performance can be easily monitored if required.
- Embedded system - provides more uniform performance, eliminates risk of vandalism.
- Long lasting - 10 to 40 year service life, reduces maintenance and the need for future repairs.
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Usage - Bridges, piers and wharves.
- Power and industrial plant rehabilitation.
- Concrete jacketing / section enlargement.
- Galvanic jackets for columns.
- Galvanic jackets for walls.
- Joints repairs and widening.
- Service life extension in severe service conditions.
- Conventionally reinforced, prestressed and post-tensioned concrete.
- New construction.
- New / old concrete interfaces.
Advantages - Proven technology - supported by independent testing.
- High capacity - can provide more zinc and more current output than many other galvanic anode systems.
- Design flexibility - anode design and spacing can be customised to meet project specific cathodic protection performance requirements and service life objectives.
- Versatile - can be used for both conventionally reinforced, prestressed or post-tensioned concrete.
- User friendly - installation is quick and easy, requiring no specialised equipment.
- Low maintenance - requires no external power source or system monitoring.
- Measurable - system performance can be easily monitored if required.
- Embedded system - provides more uniform performance, eliminates risk of vandalism.
- Long lasting - 10 to 40 year service life, reduces maintenance and the need for future repairs.
Packaging Custom-packaged based on project requirements. For additional information, contact Sika Technical Services. |
Technical Information Design Considerations Sika Galvashield DAS Distributed Anode System can be used for corrosion prevention, corrosion control or cathodic protection applications. Anode unit design and spacing are varied to meet project objectives. Anode spacing can vary from 150 mm to 750 mm on center depending on project objectives, the severity of the service environment, and expected service life of the anode components. In environments with average annual temperatures higher than 15oC, or more corrosive conditions (e.g. marine environments), Sika Galvashield DAS-X anodes are receommended. For assistance with system design, please contact Sika Technical Services.
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The above design is only a sample of the options available, for reference purposes only. Our policy of continuous improvement may result in a change of specifications without notice. If any discrepencies might be between the data sheet values and standards, we reserve the rights to make technical changes. Our company will not be held responsible, as all or any of pictures, drawings, weights and dimensions details or other elements in this document are only indicative and must not be considered contractual. Contact our sales team for other specifications or custom made products.
Contact our sales team for other specifications or custom made products.
