The present invention relates to rolling practice. The proposed roll comprises a sleeve with a hard-alloy insert having a working surface and an element for protection of the insert against electrochemical wear. The element comprises an inductor coil located on the sleeve, and a magnet fixed stationary nearby the coil. Parts of turns of the coil located on the side of its outer surface are electrically connected to the hard-alloy insert, and parts of turns of the coil located on the side of its inner surface are adapted to be in electric contact with the coolant fluid.
