Fe Si Anodes W Are the most common impressed current anodes W Are used in soil, water or sea water W Come in two grades; FeSi and FeSiCr for sea water applications W Anode typical chemical composition as well as electrochemical properties are shown in the coming slide. W Anodes could be a single head type or double head, solid or tubular. W Cable connection to anode shall be handled with great care. W There are numerous methods of cable connections to anode. PreviousNext1234 Composition, ASTM A518 Grade 3 Silicon14.20 - 14.75% Chromium3.25 - 5.00% Manganese1.50% max Carbon0.70 -1 .10% Copper0.50% max Molybdenum0.20% max Electrochemical properties Average soil resistivity along grounded, Ohm cm Maximum Amps per anode in a coke breeze column, 12" OD by 60"Equivalent current density on surface of coke breeze column, Milliamps/sq ft Less than 10002.00127 (see note) 1000 - 15001.75111 (see note) 1500 - 20001.5096 2000 - 30001.2580 Over 30001.0064
