The invention discloses a
composite coating material for repairing the inner
diameter corrosion surface of a
hydraulic cylinder and a preparation method of the
composite coating material, belongs to the field of
metal anti-
corrosion coatings, can effectively solve the problems that the inner
diameter of the
hydraulic cylinder is corroded, a matched sealing ring is seriously abraded and the like, and has the advantages that thermal stress is not introduced, the repairing efficiency is high and the
accessibility is good. A
corrosion inhibitor is stably combined on the surface of a porous polyether-
ether-
ketone nano-
particle material by adopting a layer-by-layer self-
assembly method to obtain polyether-
ether-
ketone nano-particles loaded with the
corrosion inhibitor, and then the polyether-
ether-
ketone nano-particles loaded with the
corrosion inhibitor are mixed with
epoxy resin to obtain a uniform and stable modified
epoxy resin anticorrosive
coating. The obtained modified
epoxy resin coating has excellent mechanical performance, corrosion resistance and
machinability, can effectively inhibit the corrosion of the inner
diameter of the cylinder body, maintains the
dimensional precision and surface quality of the inner diameter of the cylinder body through
machining, meets the service requirements of cylinder body parts, is simple and rapid in repairing process, can effectively repair damage caused by corrosion, and has a good application prospect. And the maintenance time and cost are reduced.