Formula 1
5.5 Anode to cathode area ratio. Geometries where the area of the cathodic material is larger than the area of the anodic material shall be avoided. Data collected in this standard was collected in a 1:1 anode-to-cathode ratio. The specific anode-to-cathode ratio (A/C) required for compatibility depends on the corrosion rate (CR) between any given galvanic couple, and is given by the following relationship: