In this book we collect the information of cathodic protection for pipeline in practical fields, to obtain data base to understand and optimize the design which is made by simulation for the environmental factors and cathodic protection variables also soil resistivity and recording the anodes voltage and its related currents for the protection of underground pipelines. Modeling enables the designer to build cathodic protection for buried structure and predicting the places of anodes sites and its operating voltages and currents under various operational conditions, and comparing it with those...