an anode arrangement for use in the internal cathodic protection of a pipe includes a hollow anode - carrier member to be connected along the length of the pipe and to form a continuation of the channel defined by that pipe and further includes an anode mounted in the recess of the carrier member , the anode being offset from , but communicating with , the channel of the pipe so that the anode lies substantially wholly within the recess and does not obstruct the flow in the pipe . in a preferred construction the anode is mounted on a cover plate of the carrier member so that the anode can be removed from externally of the channel of the pipe .