▎ 摘　　要

NOVELTY - The utility model claims a high corrosion resistant cobalt base alloy screw element, comprising a screw element main body, outer screw thread, a connecting rod; an extension rod and a locating bolt; the surface of the screw element main body is provided with equidistant outer screw thread; and the two ends of the screw element main body are provided with a connecting rod; the inner part of the connecting rod is provided with an adjusting cavity; and the inner wall of the adjusting cavity is provided with an inner spiral groove with equal distance; the inner part of the adjusting cavity is provided with an extending rod; and the outer wall of the extending rod is provided with an outer spiral strip with equal distance; the outer spiral strip and the inner spiral groove are engaged with each other; the surface of the screw element main body is coated with a chromium alloy layer; the surface of the chromium alloy layer is provided with a graphene covering layer; and the surface of the graphene covering layer is provided with a corrosion-proof coating. The utility model not only can adjust the length of the screw rod element, has high corrosion resistance, but also has skid-proof effect, providing convenience to the mounting and dismounting of the bolt element.