Field guide to the installation of embedded anodes
This document provides step-by-step instructions for installing embedded galvanic anodes to protect reinforcing steel in concrete repairs. It covers preparation, material selection, equipment, safety, and installation procedures for both Type 1 and Type 2 anodes. The guide emphasizes compatibility with low-resistivity repair materials and includes safety and regulatory compliance notes.
The guide is intended for owners, engineers, and contractors involved in concrete repair projects, particularly in chloride-contaminated or carbonated concrete environments. It explains how to mitigate the 'ring-anode' effect and offers practical installation methods for different repair scenarios.
| Resistivity Requirement | Less than 15,000 ohm-cm |
|---|---|
| Minimum Clearance | 3/4 in. [19 mm] or 1/4 in. [6 mm] larger than nominal maximum aggregate size |
| Connection Resistance | Less than 1 ohm |
Embedded galvanic anodes reduce the corrosion activity of reinforcing steel in the vicinity of the installed anode.
Embedded galvanic anodes should be used only with cementitious or cementitious-polymer repair materials with resistivity less than 15,000 ohm-cm.
Basic hand tools and a DC ohm meter capable of reading 0 to 200 ohms.