Local Chromium Plating as a Promising Method for Refurbishing Long Retained Mandrels in Continuous Rolling Mills

Technology and equipment based on local chromium plating have been developed for local repairing surfaces with defects on long chromium-plated mandrels of pipe rolling mills. The local refurbishing of chromium layers prevents the further defect development and, as a result, makes it possible to prolong tool service life. The applicability of the proposed technology and the qualitative characteristics of local chromium coatings have been confirmed in the course of laboratory-scale and industrial testing.