Extension of Cathodic Protection effect to Steel Piles At tidal and Splash Zone *Dr.Mohamed Ahmed M. Khalil** Dr.A.M .Abdel-Gaber*Ras Lanuf Oil & Gas Processing Co.Technical Services Department Corrosion Engineering DivisionFax : 00218 21 3605174Mobile:00218913804797/+218924084797E-mail : kalil.mohamed95@yahoo.com OR m.khalil@raslanuf.ly**Chemistry Department Faculity of Scince Alexandria universityE-mail:ashrafmoustafa@yahoo.com : AbstractThe effectiveness of cathodic protection system has been studied at the tidal- inter-tidal and splash zone areas by laboratory simulation test. Different electrolyte conducting material have been used in order to select the most suitable condition for achieving the most important factor for operating the cathodic protection at the splash zone area. Different sizes of both bare and coated steel have been tested in natural sea water. Fully submersed and above water potential (splash zone) measurements have been performed at all executed experiments. The obtained results raveled that the cathodic protection has been achieved on both bare & coated steel at above water (splash zone). The obtained results have been confirmed by both ultrasonic and visual observation after long term test exposure time. Optical photographic photos before and after exposing test samples are presented. Structure to Sea water Potential vs. exposure time as well as vs. splash zone up ward distances were recorded and presented. The simulation tests have been repeated in different environmental conditions and reproducible results have been obtained. Keywords :Cathodic protection splash zone tidal zone conducting materials protection potential.