The Galvashield VP embedded galvanic anode is used to mitigate ring anode corrosion or the halo effect when repairing reinforced concrete. The halide-activated (Type 1H) anode is comprised of high purity zinc cast around two steel tie wires with a cement-based mortar that keeps the zinc active over the life of the anode. Once installed, the zinc anode corrodes preferentially to protect the adjacent reinforcing steel.
Galvanode® VP anodes are halide activated and contain substances that are corrosive to both the high purity zinc core and reinforcing steel and these substances will will remain in the structure over time. The anode units should be installed a sufficient distance away from reinforcing steel using the anode stand offs to minimize corrosion risk after the anodes are consumed or if the anodes become electrically disconnected from the reinforcing steel.
Unit Size (diameter x length)
Zinc Mass (g)
Galvanode VP 60
35 x 80 x 40 mm
(1.3 x 3.1 x 1.6 in.)
Galvanode VP 100
35 x 110 x 40 mm
(1.4 x 4.3 x 1.6 in.)
1 - Installed in Concrete Repairs
2 - Installed in Drilled Holes in Sound Concrete
A - Alkali-activated using High pH
H - Halide-activated using Corrosive Salts
Repair Material Properties
For optimum performance, use Galvashield® Embedding Mortar when grouting anodes in drilled holes to provide an ionically conductive path to the substrate.
- Mitigates ring anode corrosion (halo effect) in concrete repairs
- Bridge deck repairs, expansion joint repairs, widenings and other structure modifications
- Parking deck, beam or column repairs, slab replacements and other interfaces between new and existing concrete
- Repairs to wharf slabs, beams, piles and pile caps
- Repair of pre-stressed and post-tensioned concrete
- Protects chloride contaminated or carbonated concrete and structures with epoxy-coated rebar
This product has been used to solve corrosion problems across these markets.