EFFECT OF ANODE SHAPE AND ELECTROLYTE ON THE EFFICIENCY CHARACTERISTICS OF SACRIFICE ANODE IMMERSE METHOD WITH DNVGL-RPB401

Abstract

Corrosion is a damage which occurs naturally. One method of corrosion prevention is cathodic protection using the sacrificial anoda. one standard commonly used in cathodic protection design is DnVGL-RPB401. In addition, DnVGLRPB401 method can be used to measure anoda current capacity. In this research, the variation of shape of the anode was the shape of a cylinder anode, beam and cone. The variation of electrolyte is pure NaCl solution, Kitchen Salt solution and Kenjeran sea water. In the electrolyte pure NaCl solution, each anode form has an efficiency of 86%, 83%, and 78% respectively. the cylindrical anode shape has the highest efficiency because the same distance between anode and cathode at the cylindrical anode.so that the current distribution is evenly distributed. Then in the form of cylindrical anodes, each electrolyte medium has an efficiency of 114%, 86% and 83% respectively. The salt solution has the highest efficiency because of the low content of NaCl which is the cause of corrosion and the presence of potassium Iodide which is a corrosion inhibitor.