Abstract: A process is herein provided for coating tube plates found in condensers, coolers or heat exchangers, with an anti-corrosion medium. The process includes inserting plugs 5 into the ends 3 of the tubes. One or more shuttering elements 6 are then applied over the outside of the plugs 5 and in front of the tube plates 1 thereby forming an enclosed intermediate space 8 between the tube plates and the shuttering. Anti-corrosion medium is then fed into the intermediate space 8 to form a coating 9 over the tube plate 1. Upon hardening of the medium, the shuttering is removed and the plugs are pulled out from the ends of the tubes.