Using Sacrificial Zinc Anodes to Inhibit Corrosion
When repairing concrete damage caused by embedded steel corrosion, it may not be enough to simply remove and replace. In applications where the existing steel, after being cleaned and coated, will come into contact with both old concrete and new patch material, accelerated corrosion is possible due to the differences in electrical potential between the old and new materials. To prevent corrosion, zinc anodes can be installed prior to new concrete placement. The zinc, which has a higher corrosion potential than steel, will corrode in preference to the more noble metal, steel.