Abstract: A sacrificial anode and a protective coating for cathodically protecting a pipeline against corrosion especially in underground installation. The preferred anode includes a tubular shell of sacrificial anodic material electrically contacted by integral or intermediate contacts with the pipe andd having a longitudinal seam for opening and closing the anode to place it around the pipe with corrosion and electrical resistant coating material between the anode and pipe. The outer surface of the anode can have a coating of a salt material suitable for forming an electrolyte with water in the surrounding soil. In a preferred and easily installable form, the anode comprises a pair of shell halves having a coating material secured to the inner surface thereof and extending longitudinally beyond the shell halves to overlap the coating material of pipe sections at a ends of the mill-wrap coating cut-back.