Abstract: An account has been given for corrosion-protection of metal constructions, e.g. in the form of a pipeline consisting of interconnected pipelines (10, 10a, 10b, 10c, 10d) and, possibly, incorporatable in a larger pipe system. Said metal construction is, for purpose of corrosion-protection, assigned one or more sacrificial anodes in the form of one or more bodies made of a metal or a metal alloy which is less noble than the metal to be corrosion-protected. In order to utilize the sacrificial anode(s) beyond its corrosion-protecting ability within said construction, said one or more sacrificial anode bodies are included in the metal construction as at least one functional part thereof, e.g. in the form of at least one pipe length (10).