Galvanic protection systems utilize dissimilar metals to provide protection to embedded reinforcing steel. When two 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 the case of concrete, zinc is used to provide galvanic protection to the steel. This type of system does not require on-going monitoring and is suitable for conventionally reinforced and prestressed/post-tensioned concrete.

The following additional information is available:

Galvashield® XP+

Downloadable files -
Data Sheet
Installation Instructions
Installation Process

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Vector Galvashield® XP+
Embedded Galvanic Anode for Corrosion Prevention and Corrosion Control

Vector Galvashield XP+ embedded galvanic anodes utilize an innovative zinc core design surrounded by a specially formulated cementitious mortar to provide high capacity, high current output performance. Galvashield XP+ is used in concrete rehabilitation to control active corrosion adjacent to completed patch repairs and to prevent the formation of new corrosion sites. The small puckshaped anode [2.5 in. (64 mm) diameter by 1.1 in. (27 mm) high] is quickly and easily fastened to the exposed reinforcing steel. Once installed, the zinc core corrodes preferentially to the surrounding rebar, thereby providing galvanic corrosion prevention to the adjacent reinforcing steel.

Applications:

Severe service conditions Concrete with high chloride content High steel density Patch repairs where concrete removal does     not extend until clean steel is encountered Bridge widening Joints between new and existing concrete Slab replacement Expansion joint repair Prestressed concrete Post-tensioning anchors Repair of epoxy-coated rebar

Features and Benefits

	High capacity - contains 60% more zinc than Galvashield XP.
	High output - typically 2 times the current output of Galvashield XP.
	Focused protection - provides localized corrosion control where it is needed the most, at the interface of the repair and the remaining contaminated concrete.
	Economical - cost method of providing galvanic corrosion control to structures in demanding service conditions.
	Versatile - can be used for both conventionally reinforced and prestressed or post-tensioned concrete.
	User friendly - installation is quick and easy, requiring no special equipment or training.
	Low maintenance - requires no external power source or system monitoring.
	Measurable - anode performance can be easily monitored if required.
	Long lasting - 10 to 20 year service life* reduces the need for future repairs.

*As with all galvanic protection systems, service life is dependent upon a number of factors including reinforcing steel density, concrete conductivity, chloride concentration, humidity and anode spacing.