a method and apparatus for the corrosion protection of tank soil side bottoms is achieved by providing equipment to an existing storage tank as by installing a chime delivery system about the perimeter of the storage tank bottom plate , and introducing an appropriate amount of a corrosion inhibitor into the chime delivery system , whereby the corrosion inhibitor is readily admitted into the spaces between the substrate and the tank bottom plate . the system avoids any refurbishment of the tank and allows for easy introduction and replenishment of inhibitor without interruption of tank operations . the system also does not require any renovation of the tank , and does not require any replacement of the tank bottom plate panels .