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Vector Corrosion Services

Galvashield® DAS

Distributed Anode System for Controlling Corrosion on Reinforced Concrete Structures

Galvashield® DAS is a distributed galvanic anode system designed to protect reinforced concrete decks, columns, beams and walls. The cathodic protection anodes are installed in new concrete, embedded in concrete overlays, encapsulated inside reinforced concrete jackets or stay-in-place forms for column protection, and at new/old concrete interfaces for targeted repairs such as joint repairs and bridge widening.

Galvashield® DAS Type C (Cast) anodes contain alkali-activated mortar cast around a high purity zinc core. Galvashield® DAS Type F (Foil) anodes are alkali-activated zinc with an exterior zinc foil wrap to provide a high burst of initial current.  For applications where anodes will be installed in submerged or tidal conditions i.e. piles, use Galvashield® DAS Marine anodes.

Type F (Foil Wrapped) and Type C (Cast Mortar) Anodes: Weights and Lengths
Zinc Weights 25 = 0.25 lb/ft 37 = 0.37 kg/m
60 = 0.6 lb/ft 89 = 0.89 kg/m
120 = 1.2 lb/ft 180 = 1.8 kg/m
Lengths 36 to 78 in 100 to 200 cm

Galvashield® DAS Marine anodes provide galvanic cathodic protection to concrete piles in submerged and tidal marine environments. Galvashield® DAS Marine anodes can be used in saltwater, brackish water, and fresh water where the anodes may be submerged during and after installation.  Galvashield® DAS Marine anodes are used as part of the Galvashield Jacket System to protect corroding concrete and steel piles on bridges, wharfs and other marine structures.

Galvashield® DAS Type M (Marine) anodes are alkali-activated zinc anodes with an exterior layer of portland cement mortar. Because these anodes are self-activated, they can provide excellent protection to concrete elements exposed to a range of humidity conditions  (submerged, splash zone, periodic spray and atmospheric). Galvashield® DAS Type W (Wicking) anodes are high purity zinc anodes surrounded with a special wicking fabric that provides for direct saltwater exposure to the zinc core within the jacket and excellent long-term performance.

Galvashield® DAS Marine Product Options
Types Type M
(alkali-activated marine)
Type W
(seawater wicking)
IMPERIAL METRIC
Zinc Weight Type M = 2lb/ft
Type W = 1.6lb/ft
Type M = 3kg/m
Type W = 2.4kg/m
Anode Length 36 to 90 in 100 to 230 cm

The anode shape, quantity of zinc, electrical components and installation procedures are customized to meet specific project requirements. Individual anode units are typically square, rectangular or circular in cross section and can be supplied in lengths up to 7.5 ft (2.3 m).

Applications:

  • Bridge and marine structures
  • Bridge widening
  • Concrete jacketing/section enlargement
  • Galvanic jackets for columns and piles
  • Galvanic deck overlays
  • Service life extension in severe service conditions
  • Conventionally reinforced and prestressed/post-tensioned concrete
  • Galvanic Encasements

  • Galvashield DAS Marine Type M Anode on Concrete Pile
  • Galvashield DAS Type F Anode on Bridge Pier
  • Galvashield DAS Type F Anode on Building Column
  • Galvashield DAS Type F Anode at Stadium Renovation
  • Galvashield FAS Type F Anode on Shipping Pier
  • Galvashield DAS Type C Anode on Bridge Deck Overlay
  • Galvashield DAS Type F Anode on Bridge Deck Overlay
  • Galvashield DAS Type F Anode on Bridge Abutment Repair
  • Galvashield DAS Type C Anode on Marine Pile Cap Repair
  • Galvashield DAS Type C Anode on Marine Pile Cap Repair
  • Galvashield DAS Type F Anode on Bridge Deck Repair
  • Galvashield DAS Type F Anode in Expansion Joint Repair
  • Galvashield DAS Type F Anode in Bridge Deck Overlay
  • Galvashield DAS Marine Type M Anode on Concrete Bridge Pile Repair
  • Galvashield DAS Type F Anode on Concrete Column Repair
  • Galvashield DAS Type F Anode on Bridge Parapet Replacement
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